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2 AA Battery Holder Box Case with Switch New 2 AA 2A Battery Holder Box Case with Switch
 
 
Description
100% New
High Quality
Keep your batteries organized and protected.
The case can hold 2 x AA batteries.
Batteries not included.
Specifications:
Color:Transparent
Case Size: 6.8 x 3.3 x 1.8 cm
 
Package Included
1 Pcs 2 AA Batteries Case

 
650nm 5mW Red Point / Line / Cross Laser Module Head Glass Lens Focusable Industrial Class
 
 
Description
 Laser launch principle and the specificity of the production process determines the laser with ordinary light does not have the characteristics of the three good (monochromatic good, good coherence, good direction) a high (high brightness).
The use of laser orientation of the good brightness, high grams widely used in various occasions, change the series of laser tube convenient and intuitive, easy to install, stable and reliable.
Product Usage:
1.It could be used for sight positioning
2. It could be used for laser testing tools
3. It could be used for concentricity positioning
4. It could be used to make signal equipment
Product Information(Point):
Red dot point laser tube, laser module
Wavelength: 650nm
Diameter: 12MM
Weight: 13.5g
Long: 35MM
Max Power: 5MW
Voltage: DC3V-6V
Max Current: 40MA
Drive circuit: APC
Product Information(Line):
Red (adjustable Line) laser tube, laser module
Wavelength: 650nm
Diameter: 12MM
Weight: 13.5g
Long: 36MM
Power: 5MW
Voltage: 3V-6V
Current: 30-50MA
Product Information(Cross):
Red cross line laser tube, laser module
Diameter: 12MM
Weight: 13.5g
Long: 36MM
Power: 5MW
Voltage: DC3V-6V
Current: 25-50MA
 
Package Included
1 Pcs 650nm 5mW Laser Module
 

 
650nm 5mW Red Point / Line / Cross Laser Module Head Glass Lens Focusable Industrial Class
 
 
Description
 Laser launch principle and the specificity of the production process determines the laser with ordinary light does not have the characteristics of the three good (monochromatic good, good coherence, good direction) a high (high brightness).
The use of laser orientation of the good brightness, high grams widely used in various occasions, change the series of laser tube convenient and intuitive, easy to install, stable and reliable.
Product Usage:
1.It could be used for sight positioning
2. It could be used for laser testing tools
3. It could be used for concentricity positioning
4. It could be used to make signal equipment
Product Information(Point):
Red dot point laser tube, laser module
Wavelength: 650nm
Diameter: 12MM
Weight: 13.5g
Long: 35MM
Max Power: 5MW
Voltage: DC3V-6V
Max Current: 40MA
Drive circuit: APC
Product Information(Line):
Red (adjustable Line) laser tube, laser module
Wavelength: 650nm
Diameter: 12MM
Weight: 13.5g
Long: 36MM
Power: 5MW
Voltage: 3V-6V
Current: 30-50MA
Product Information(Cross):
Red cross line laser tube, laser module
Diameter: 12MM
Weight: 13.5g
Long: 36MM
Power: 5MW
Voltage: DC3V-6V
Current: 25-50MA
 
Package Included
1 Pcs 650nm 5mW Laser Module
 

 
650nm 5mW Red Point / Line / Cross Laser Module Head Glass Lens Focusable Industrial Class
 
 
Description
 Laser launch principle and the specificity of the production process determines the laser with ordinary light does not have the characteristics of the three good (monochromatic good, good coherence, good direction) a high (high brightness).
The use of laser orientation of the good brightness, high grams widely used in various occasions, change the series of laser tube convenient and intuitive, easy to install, stable and reliable.
Product Usage:
1.It could be used for sight positioning
2. It could be used for laser testing tools
3. It could be used for concentricity positioning
4. It could be used to make signal equipment
Product Information(Point):
Red dot point laser tube, laser module
Wavelength: 650nm
Diameter: 12MM
Weight: 13.5g
Long: 35MM
Max Power: 5MW
Voltage: DC3V-6V
Max Current: 40MA
Drive circuit: APC
Product Information(Line):
Red (adjustable Line) laser tube, laser module
Wavelength: 650nm
Diameter: 12MM
Weight: 13.5g
Long: 36MM
Power: 5MW
Voltage: 3V-6V
Current: 30-50MA
Product Information(Cross):
Red cross line laser tube, laser module
Diameter: 12MM
Weight: 13.5g
Long: 36MM
Power: 5MW
Voltage: DC3V-6V
Current: 25-50MA
 
Package Included
1 Pcs 650nm 5mW Laser Module
 

10A AS-10 Auto On Off Light Switch Photo Control Sensor 12V 220V
Description:
Product Name:light control switch
Model:AS-10
Rated Voltage:DC12V / DC24 / AC220V
Rated  Current:10A
Product features: dark and automatically turns off automatically open dawn
 
Package Included
1 Pcs Auto On Off Switch

 
 
32650 2*3 Battery Holder Bracket Cell Safety Anti Vibration Plastic Brackets For 32650 Batteries
 
 
Description:
32650 battery holder, Cylindrical li-ion battery bracket, For any type of battery assembly. 
Our company launch a new parts (32650 battery holder), which is mainly used for assembling 32650 li-ion battery. This battery holder is with very good flexibility. Using this holder, we can make different battery pack , such as 12 v, 24 v, 36v battery pack, which can be used as electric bike battery, electric tools battery, storage battery and electric car battery, etc. 
Material: Plastic 
Color: Black 
Size: 103.5*69MM, without the protruding part of the toothed buckle.
Diameter: 32.4MM.
 
Package Included:
1 Pcs 32650 Battery Holder Bracket
 
 

 
High Quality Humidifier Ultrasonic 20mm Atomization Amount of Fog 24V Atomizer Head DIY Fog Humidifier Parts
Description:
 
Easy operation, long service life, self protection
Amazing fog effect is added to your pool or rockery water or filtering bad smell and ultrasound technology
Suitable for indoor or outdoor fountains, water features, rockery water and office use
With functions of automatic water protection, such as water level below the sensor, the atomizer will automatically stop working.
Technical parameters:
Power: 19 (W) (plus or minus 1 W)
Atomization: > 500 cc/har
Working voltage: 24 (V) DC (direct current transformer)
Working frequency: 1700 50 (KHZ)
Change can diameter:  20 mm
Effective water: 20 mm to 75 mm
The door type high H12mm
Spray head diameter:  45 mm
High: H35mm
Black wire specifications: 3.8 mmPVC line, power cord L1400 20 mm long
Plug type:  5.5 x 2.1 mm plug
Weight:300g
Length of the cable: 110CM
 
Package includes:
1 Pcs atomize
 

 
Wireless Module CH340/CP2102/CH9102X NodeMcu V3 V2 Lua WIFI Internet of Things Development Board Based ESP8266 ESP-12E
 
 
Description
ESP8266 CH340 V3/ESP8266 CP2102
2.Interactive
3.Programmable
4.Low cost
5.Simple
6.Smart
WI-FI enabled
Ard--uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like ard--uino, but interactively in Lua script.
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.
Introduction:
ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters,
and power management module. The entire solution takes up the least amount of printed circuit board area.
This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology,
power and RF properties best, which is safe, reliable, and scalable to a variety of applications.
Features:
High performance-price ratio
Small volume, easily embeded to other products
Strong function with support LWIP protocol, Freertos
Supporting three modes: AP, STA, and AP STA
Supporting Lua program, easily to develop
ESP8266 CH9102X
1.Open-source
2.Interactive
3.Programmable
4.Low cost
5.Simple
6.Smart
WI-FI enabled
Ard--uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like ard--uino, but interactively in Lua script.
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.
Lowest cost WI-FI
 
Package Included
1 Pcs ESP8266 Module

 
Wireless Module CH340/CP2102/CH9102X NodeMcu V3 V2 Lua WIFI Internet of Things Development Board Based ESP8266 ESP-12E
 
 
Description
ESP8266 CH340 V3/ESP8266 CP2102
2.Interactive
3.Programmable
4.Low cost
5.Simple
6.Smart
WI-FI enabled
Ard--uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like ard--uino, but interactively in Lua script.
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.
Introduction:
ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters,
and power management module. The entire solution takes up the least amount of printed circuit board area.
This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology,
power and RF properties best, which is safe, reliable, and scalable to a variety of applications.
Features:
High performance-price ratio
Small volume, easily embeded to other products
Strong function with support LWIP protocol, Freertos
Supporting three modes: AP, STA, and AP STA
Supporting Lua program, easily to develop
ESP8266 CH9102X
1.Open-source
2.Interactive
3.Programmable
4.Low cost
5.Simple
6.Smart
WI-FI enabled
Ard--uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like ard--uino, but interactively in Lua script.
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.
Lowest cost WI-FI
 
Package Included
1 Pcs ESP8266 Module

 
Wireless Module CH340/CP2102/CH9102X NodeMcu V3 V2 Lua WIFI Internet of Things Development Board Based ESP8266 ESP-12E
 
 
Description
ESP8266 CH340 V3/ESP8266 CP2102
2.Interactive
3.Programmable
4.Low cost
5.Simple
6.Smart
WI-FI enabled
Ard--uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like ard--uino, but interactively in Lua script.
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.
Introduction:
ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters,
and power management module. The entire solution takes up the least amount of printed circuit board area.
This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology,
power and RF properties best, which is safe, reliable, and scalable to a variety of applications.
Features:
High performance-price ratio
Small volume, easily embeded to other products
Strong function with support LWIP protocol, Freertos
Supporting three modes: AP, STA, and AP STA
Supporting Lua program, easily to develop
ESP8266 CH9102X
1.Open-source
2.Interactive
3.Programmable
4.Low cost
5.Simple
6.Smart
WI-FI enabled
Ard--uino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like ard--uino, but interactively in Lua script.
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.
Lowest cost WI-FI
 
Package Included
1 Pcs ESP8266 Module

 
 
ESP32 ESP32S For Wemos For Raspberry Pi 18650 Battery Charge Shield Board V3 Micro USB Port Type-A USB 0.5A For Arduino Charge
 

 
Description
Battery protection(Over charge or Over discharge)
Micro USB port Input
Type-A USB Output
0.5A current charging
1 switch control USB output
5~8V Input Voltage
3V & 1A Output
5V & 2A Output
LED indicate(Green means full,Red means charging)
3V output port x3
5V output port x3
Be careful of " " and "-", You should follow the direction of " ""-" on the PCB.
If you put wrong direction, charging chip will be destroyed.
This product does not include 18650 battery
Size: 9.8x2.9cm/3.86x1.14inch
 
Package Included
1 Pcs Battery Shield Module (does not include 18650 battery)
 

 
 
52mm PP Liquid Water Level Sensor Horizontal Float Switch Down
 
 
Description
Float level switch is a simple structure, easy to use level control device, it does not provide power, no complicated circuit, it has a mechanical switch than the average small size, long life and other advantages. As long as the material used in the correct shape and nature of any liquid or pressure, temperature can be used, which in the shipbuilding industry, generating equipment, petrochemical industry, food industry, water treatment equipment, dyeing and finishing industry, hydraulic machinery, etc. have been widely application.
How it works: liquid level sensor magnetic reed switch by having an important and integral float, float within the magnetic material in a sealed non-magnetic metal pipe or plastic pipe set one or more magnetic reed switch, and then the catheter through a or more with magnetic float, and double-loop control using a fixed float and reed switch in the relevant position, the float rises or falls with the liquid using the ball close to the beginning of the reed contacts, resulting in open and shut action for level control or direction (when the float near the reed switch is turned on; leave the switch off)
Max Contact Rating :10W
Max Switching Voltage:AC/DC110V
Max Switching Current:0.5A
Max Breakdown Voltage:AC/DC110V
Max Contact Resistance:100mohm
Temperature Rating:-10~ 60
Float Ball Material:P.P
 
Package Included
1 Pcs 52mm PP Liquid Water Level Sensor

 
 
5V/12V Power Supply MP3 Decoder Board Player with Display Dual Channel Without Power Amplifier Remote Control FM Power Off Memor
Description:
This decoder board is 5-12V without amplifier can not directly connect the speaker.
 
1.About power-off memory: The power-off memory function of this decoder board can only record the song currently playing, and it cannot remember to the second!
2.Panel size: 91mm*35mm*31mm
3.Support U disk / SD card / MMC card, LIN adjustable, can control AUX external audio input volume and mute;
4.Support multiple folder music player, electronic clock;
5.Multiple EQ sound modes;
6.Infrared remote control;
7.LED digital display;
8.With memory function;
 
 
Package Included:
1 Pcs MP3 Decoder Board
 
 

 
 
5V/12V Power Supply MP3 Decoder Board Player with Display Dual Channel Without Power Amplifier Remote Control FM Power Off Memor
Description:
This decoder board is 5-12V without amplifier can not directly connect the speaker.
 
1.About power-off memory: The power-off memory function of this decoder board can only record the song currently playing, and it cannot remember to the second!
2.Panel size: 91mm*35mm*31mm
3.Support U disk / SD card / MMC card, LIN adjustable, can control AUX external audio input volume and mute;
4.Support multiple folder music player, electronic clock;
5.Multiple EQ sound modes;
6.Infrared remote control;
7.LED digital display;
8.With memory function;
 
 
Package Included:
1 Pcs MP3 Decoder Board
 
 

High Quality 0.56 Inch LCD Red / Blue / Green Light DC 0-100V Panel Meter DC Digital Voltmeter
Description:
To achieve the best measurement precision, the voltmeter will measure the voltage according to the different automatic moving the position of the decimal point
Can be used for measuring the car / battery car / motorcycle battery voltage, and other forms of voltage
Can be used in all kinds of voltage measurement purposes
Technical Parameters:
Weight:18g
Display color:Red/blue/green
Display mode:Three 0.56 LED digital tube
update rate:About 500 ms/time
Physical size: 48 x 29 x 22 mm (L*W* H)
Opening size:45 x 26 mm (L*W)
Input range :4-30V
Power supply:Need the power supply
Lead wire length:14 cm(Three wires)
The minimum input:4V
The maximum input:30V
Measurement range:DC 0-100V
Operation temperature:-10 degrees~65 degrees
Measurement accuracy:± (1% 2 Digit)
Red line : Power Supply (4-30V )     Yellow line: Measure Voltage  Black line: Power Supply -, Measure Voltage-
Package Included:
1 Pcs  0.56 LCD DC Digital Voltmeter
 

ESP32 Development Board WiFi Bluetooth Ultra-Low Power Consumption Dual Cores ESP-32S Board
Description:
ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area. This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology, power and RF properties best, which is safe, reliable, and scalable to a variety of applications.
High performance-price ratio
Small volume, easily embeded to other products
Strong function with support LWIP protocol, Freertos
Supporting three modes: AP, STA, and AP STA
Supporting Lua program, easily to develop
Development Board: https://github.com/Nicholas3388/LuaNode
Click the link for more details:http://espressif.com/en/products/hardware/esp32-devkitc/overview
https://github.com/espressif/arduino-esp32/blob/master/doc/windows.md
Package Included
1 Pcs ESP32 Development Board

DC 6-30V 6A Motor Speed Controller Reversible PWM Control Forward/Reverse Switch Board 6V-30V Max 10A Module 12V 24V CCM6N
 
Description
Material: Plastic, metal
High efficiency, high torque, low heat generating
Control the speed of a DC motor with this controller
With reverse polarity protection, high current protection
Input: DC 6~30V
Output: Max 80W
PWM range: 10% ~ 95%
Current: Max 10A (Recommend you to use in 6A)
With potentiometer
With reversible switch
All tested before shipment
Operating Instruction:
1. Connect it to the power, ensure the positive inversion switch located in the middle of the zero, and connected with a DC power supply(the DC supply voltage range is more than 6V and less than 30V). Warning: do not reverse the positive and negative terminals of DC power source, otherwise regulator may be damaged.
2. Connect it to the motor, the motor line can be positive or negative, when the running direction is not consistent with the expectative one, you can adjust the sequence of lines or switch position to change the direction.
3. Adjust the switch. Positive inversion switch is used to control the motor speed direction. When the switch is located on the zero position, the motor stops rotating.
4.Adjust the potentiometer knob. Adjusting potentiometer knob can change output duty ratio of the regulator, then motor speed change.
 
 
Package Included
1 Pcs PWM Motor Speed Controller

Digispark kickstarter development board ATTINY85 module
Description:
1. Support for the  IDE  (OSX/Windows/Linux).
2. Power via USB or External Source or 7-16 v to 5 v (automatic selection).
3. The On - board, 150 ma 5 v Regulator.
4. Built - in USB and serial was debugging).
5. 6 I/O Pins (2 are informs the for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8 k Flash Memory (about 6 k after bootloader).
7. The I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. The ADC on 4 pins.
10. The Power LED and the Test/Status leds.
 
Package Include:
1 Pcs ATTINY85 module

Pluggable Development Board For ATtiny13A/ATtiny25/ATtiny45/ATtiny85 Programming Editor Micro Usb Power Connector
 
Description:
ATTINY85-20 pu DIP - 8 feet into pluggable ATMEL
Development programming board ATtiny13A/ATtiny25 / ATtiny45 / ATtiny85 pluggable development programming board
Manufacturers selling fast and convenient programming
Development board support chip ATtiny13A/ATtiny25 / ATtiny45 / ATtiny85 and so on
Note that the default delivery without ATtiny MCU chip, chip please please buy their own.
Note: empty plate connecting plate no technical support
 
Package Included: 
1PCS Pluggable Development Board
 

1200W 20A DC Converter Boost Step-up Power Supply Module IN 8-60V OUT 12-83V
Description:
Module name: 1200W boost constant current module
Module properties: non isolated boost module (BOOST)
Input voltage: 8-60V
Input current: 20A
Quiescent operating current: 15mA
Output voltage: 12-83V continuous adjustable
Output current: MAX 12A over 20A, please strengthen the
cooling (with input and output differential pressure, the greater
the pressure difference between the output current is small)
Constant current range: 0.3-20A
Output power: = input voltage *10A
Working temperature: -40~ 85 degrees
Working frequency: 150KHz
Conversion efficiency: ≤95% (efficiency and input, output voltage,
current, pressure difference)
Installation: 4pcs 3mm column
Connection mode: welding output (please use big current and pure copper wire)
Module size: 130mmx52mmx46mm(LxWxH)
 
Features:
1.Over current protection: there is a certain range of error in the input over 30A,
automatically reducing the output voltage.
2.Short circuit protection: there is (input 40A fuse) double short circuit protection,
use more secure.
 
When using the boost power supply should pay attention to the following points:
1 input power supply voltage must be above 10V.
2 when the power supply is used for the input power supply, the input power and
the output voltage of the input power supply are the first to be unloaded. Then pick
up the load. (must ensure that the switching power supply has been working).
3 when the constant current mode is used to set the voltage, the constant voltage
must be higher than the input voltage.Do not use the way of short circuit output current,
the circuit structure of the boost module can not be adjusted in short circuit way.
Package Included:
1 Pcs 1200W boost constant current module

 
YDA138 Amplifier Board DC12V 2X10W Modulo Amplificador Dual Channel Audio Speaker Sound Placa Amplifier Board Sonorisation
 
Description
It's better then TA2024 chip. 
Work on wide range of voltage :support 9-14V DC,2A 
biger rate of power ,RMS:20W/per channel in 4Ohm speaker, 
and very Quiet back noise,you almost can not hear it. 
with 4 model GAIN parts.can auto work on different voltage. 
this amplifier using TDK inductance filiter output. 
it's HiFi parts.clean and without any noise output. 
YAMAHA YDA138-E chip.is with headphone OP function, 
so you can using is as a headphone amp also. 
PCB size:70x50mm
 
Package Included
1 Pcs YDA138 Amplifier Board

12V1A \ 5V1A fully isolated switching power supply / AC-DC modules / 220V switch 12v 5v dual output
for whole isolation type industrial-grade built-in power supply module, temperature protection, over current protection and short circuit protection, AC 85 ~ 265v wide voltage input, high and low voltage isolation, 5v1A\DC12V1A dual output voltage isolation, 431 voltage, output EMI filter circuit, with light, with mounting holes, high cost performance
 
Use Environment:
- Working temperature:-20 ~ 60
- Relative humidity 40  ~ 90% RH
Technical requirements
- Input voltage range:85~ 265v
- Input current:0.027A(AC110V)
                0.0136A(AC220V)
- Input Inrush Current: 20A
- Output voltage range:11.80~12.5V 0~1A
                       4.90~5.1V 0~1A
- Output power:0 ~18.5 W
- Output efficiency:84%
- Size:7.5*4.0*2.8(cm)
 
Package Include:
1 Pcs Switching Power Supply Module

DC DC Boost Converter Constant Module Current Mobile Power Supply 250W 10A LED Driver Module Non-isolated Step Up Module
Features:
1. Module Properties: non-isolated step-up module (BOOST)
2. Input voltage :8.5-48V
3. Output voltage: 12-50V (adjustable)
4. Output Current: 10A (MAX) (Please enhance heat dissipation if more than 6A)
5. Output constant Current: 0.2 - 8A (please don't short the output to adjust the current)
6. Easy to drive 65W 90W dual-core notebook.
7. Conversion efficiency: 96%
8. working frequency: 150KHZ
9. Output Ripple: 2% (MAX) 20M-bandwidth
10. Operating Temperature: Industrial (-40C to 85C) (ambient temperature exceeds 40C,
lower power use, or to enhance heat dissipation)
11. Dynamic response speed: 5% 200uS
12. Over circuit protection: yes
13. Input Reverse Polarity Protection: yes
14. Size: 70*42mm
Note: 
Please pay attention to the Voltage/Current/Power of your own devices.
To ensure product safety,check whether this item is compliant with
your own devices before you buy it!
Package includes:
1 Pcs 250W DC-DC Boost Converter

XH 2.54 connecting line (Each line with 2 seats)

 
XH-M401 DC-DC Step Down Buck Converter Power Supply Module XL4016E1 PWM Adjustable 4-40V To 1.25-36V Step Down Board 8A 200W
 
Description
Product name: DC step-down module Converter 
Voltage regulating mode: PWM modulation 
Input voltage: DC4-40V 
Output voltage: DC1.25-36V 
Max output current: 8A (more than 5A for long time use,need Fan if over 5A) 
Max power: 200W 
Conversion efficiency: 94%  
Switching frequency: 180KHZ 
Dimensions: 61*41*27mm 
Chip: switching regulator Regulating chip XL4016 with Over current protection, Over temperature protection,Short circuit protection.
When reach maximum output current 8A, need to add fan. Long term work recommended about 5A.
Panel Mounting: 
1. Drill holes in the Panel 7mm 
2. Extended potentiometer handle 
3. Lock screw sleeve upper knob
 
Package Included
1 Pcs XH-M401 DC-DC Step Down Buck Converter Power Supply Module

Description:
Using a unique material 7 cm fan, high wind pressure.
Mute design, effectively reduce the temperature of the system.
Scope of application:
Chassis cooling.
Power dissipation.
Product specifications:
Product size: 70X70X15mm
Fan size: 70X70X15mm;
Product net weight: 52g
Bearing type: Hydro Bearing
Rated voltage: 12VDC
Operating voltage: 10.8 ~ 13.2VDC
The starting voltage: 7VDC
Rated current: 0.12 ± 10% A
Input power: 1.44W
Fan speed: 3000 ± 10% RPM
The maximum air volume: 25.62CFM
Noise: 20dB (A)
Package included:
1 Pcs 7015 Cooling Fan

Description:
Using a unique material 7 cm fan, high wind pressure.
Mute design, effectively reduce the temperature of the system.
Scope of application:
Chassis cooling.
Power dissipation.
Product specifications:
Product size: 70X70X15mm
Fan size: 70X70X15mm;
Product net weight: 52g
Bearing type: Hydro Bearing
Rated voltage: 12VDC
Operating voltage: 10.8 ~ 13.2VDC
The starting voltage: 7VDC
Rated current: 0.12 ± 10% A
Input power: 1.44W
Fan speed: 3000 ± 10% RPM
The maximum air volume: 25.62CFM
Noise: 20dB (A)
Package included:
1 Pcs 7015 Cooling Fan

Dear buyer friends, thank you for your support, the connection method of this battery box is parallel, but because the shell is modified by series (so there is a series mark). When you receive the battery box, be sure to use it in parallel connection.
 
18650 Power Bank Cases  3 18650 Battery Holder Storage Box Case 18650 Parallel Battery Box
 
Description
Model: high quality 18650 boxes, 3 sections, 3.7V
Material: PP soft rubber material
Spring: nickel plated steel
Rivet: Brass
Wire: 1007 × 24awg
Exposed wire length: 150 mm
Color: Black
Note: 3 18650 lithium batteries can be installed. The output voltage is 3.7V. After the battery is installed, please do not touch the red and black together. It can be fixed with screws. Screws are not included.
 
Package Included
1 Pcs 18650 Parallel Battery Box
 

 
 
DC-DC Boost Power Supply Module Converter Booster Step Up Circuit Board 3V to 5V 1A Highest Efficiency 96% Ultra Small
Description
1. Module Properties:  non-isolated step-up module (BOOST)
2. Input voltage:  1-5V
3. Output voltage:  5.1~5.2V
4. Output Current:  Rated 1A~1.5A (Single lithium battery input)
5. Conversion efficiency:  up to 96% ( input voltage, the higher the efficiency )
6. Switching Frequency:  500KHz
7. Output ripple:  30mV (Max)  20M Bandwidth ( Input 4V, Output 5.1V 1A)
8. Voltage indication:  LED lights with a load (input voltage is lower than 2.7V LED indicator off )
9. Operating temperature: Industrial grade (-40 Celsius to 85  Celsius )
10. Full load temperature rise: 30  Celsius
11. Quiescent Current: 130uA
12. Load regulation:  ± 1%
13. Voltage regulation:  ± 0.5%
14. Dynamic response speed: 5% 200uS
15. Short circuit protection: None
16.Input Reverse Polarity Protection: None
17.Wiring: Welding
 

 
 
DC-DC boost converter Constant Current Mobile Power supply 10A 250W LED Driver
 

 
Description:
Module name :250W boost constant current module
Module properties: non-isolated step-up module (BOOST)
Input voltage: DC8.5V-48V
Input current: 10A (MAX) exceeds 8A please enhance heat dissipation
Quiescent current: 10mA (12V liter 20V, the output voltage, the higher the current will increase too quiet)
Output voltage: 10-50V continuously adjustable
Constant] range: 0.2-8A
Temperature: -40 to 85 degrees (ambient temperature is too high, please enhance heat dissipation)
Operating frequency: 150KHz
Conversion efficiency: up to 96%
Overcurrent protection: There
Input reverse polarity protection: Yes,
Installation: 4 3mm screw holes
Connection method: Connection Output
Module size: Length 70mm width 36mm height 13mm
Single module: 65 g
 
Applications:
1, DIY a power supply, 12V can input and output can 12-50V adjustable.
2, the power supply for your electronic device, according to your system can set the output voltage value.
3, as the car power supply for your laptop, PDA or a variety of digital products supply.
4, DIY a mobile notebook power supply: 12V coupled with high-capacity lithium battery pack, so you can go where light where books.
5, solar panel regulator.
6, to the battery, rechargeable lithium batteries.
7, driving high-power LED lights.
 
Package included:
1 Pcs 250W DC-DC Boost Converter Adjustable 10A Step Up Constant Current Power Supply Module
 

 
AA Power Bank Case 6 * AA Battery Holder Storage Box 6 Slot AAA Rechargeable Batteries Container 9v
 
 
Description
Size: 93*57*115(MM)
Voltage:9V
Material:ABS
Power:6 x 1.5V AA batteries
Color:Black
Net weight:18g
Wire length: 150mm
 
Package Included
1 Pcs 6*AA Battery Holder
 

2.13 /
 
DC 0-100V 50A Digital Voltmeter Ammeter Dual Display Voltage Detector Current Meter Panel Amp Volt Gauge 0.28" Red Blue LED
 
 
Description
100% Brand New.
Size: 48mm x 29mm x 26mm.
Display color: Red & Blue LED (dual display).
Display: 0.28" LED digital.
Operating voltage: DC 4.5 ~ 30V.
Measure voltage: DC 0 ~ 100V.
Minimum resolution (V): 0.1V.
Refresh rate: ≥500ms / times.
Measure accuracy: 1% (± 1 digit).
Minimum resolution (A): 0.01A.
Operating Current: <20mA.
Measure current: 50A (direct measurement, built-in shunt).
Operating temperature: -10 to 65°c.
Operating Humidity: 10 to 80% (non-condensing).
Mounting cutout: 45.5mm x 26.5mm.
 
Package Included
1 Pcs DC 0-100V Voltmeter Ammeter

2.13 /
 
DC 0-100V 50A Digital Voltmeter Ammeter Dual Display Voltage Detector Current Meter Panel Amp Volt Gauge 0.28" Red Blue LED
 
 
Description
100% Brand New.
Size: 48mm x 29mm x 26mm.
Display color: Red & Blue LED (dual display).
Display: 0.28" LED digital.
Operating voltage: DC 4.5 ~ 30V.
Measure voltage: DC 0 ~ 100V.
Minimum resolution (V): 0.1V.
Refresh rate: ≥500ms / times.
Measure accuracy: 1% (± 1 digit).
Minimum resolution (A): 0.01A.
Operating Current: <20mA.
Measure current: 50A (direct measurement, built-in shunt).
Operating temperature: -10 to 65°c.
Operating Humidity: 10 to 80% (non-condensing).
Mounting cutout: 45.5mm x 26.5mm.
 
Package Included
1 Pcs DC 0-100V Voltmeter Ammeter

SG5010 High Torque Digital Servo Motor RC Helicopter Airplane Boat For Arduino UNO R3 Sg90
Description
Coreless motor and double ball bearing.
Less noise, light weight.
Used for model airplane accessories.
Stable performance and shock proof.
Used for all remote control applications mainly R/C cars boats planes and as tail servos for helicopter
Specification
Color: Black
Connector wire length: 28.3cm
Operating speed (4.8V no load): 0.14sec/60 degrees
Operating speed (6.0V no load): 0.11sec/60 degrees
Stall torque (4.8V): (8kg/cm) (110oz/in.)
Stall torque (6.0V): (11kg/cm) (156oz/in.)
Temperature range: -30 to 60C
Dead band width: 4usec
Operation Voltage: 3.5-8.4V
Package Included
1 Pcs SG5010 Servo Motor

 
XH-M401 DC-DC Step Down Buck Converter Power Supply Module XL4016E1 PWM Adjustable 4-40V To 1.25-36V Step Down Board 8A 200W
 
Description
Product name: DC step-down module Converter 
Voltage regulating mode: PWM modulation 
Input voltage: DC4-40V 
Output voltage: DC1.25-36V 
Max output current: 8A (more than 5A for long time use,need Fan if over 5A) 
Max power: 200W 
Conversion efficiency: 94%  
Switching frequency: 180KHZ 
Dimensions: 61*41*27mm 
Chip: switching regulator Regulating chip XL4016 with Over current protection, Over temperature protection,Short circuit protection.
When reach maximum output current 8A, need to add fan. Long term work recommended about 5A.
Panel Mounting: 
1. Drill holes in the Panel 7mm 
2. Extended potentiometer handle 
3. Lock screw sleeve upper knob
 
Package Included
1 Pcs DC-DC Step Down Buck Converter Power Supply Module
 

 
XH-M401 DC-DC Step Down Buck Converter Power Supply Module XL4016E1 PWM Adjustable 4-40V To 1.25-36V Step Down Board 8A 200W
 
Description
Product name: DC step-down module Converter 
Voltage regulating mode: PWM modulation 
Input voltage: DC4-40V 
Output voltage: DC1.25-36V 
Max output current: 8A (more than 5A for long time use,need Fan if over 5A) 
Max power: 200W 
Conversion efficiency: 94%  
Switching frequency: 180KHZ 
Dimensions: 61*41*27mm 
Chip: switching regulator Regulating chip XL4016 with Over current protection, Over temperature protection,Short circuit protection.
When reach maximum output current 8A, need to add fan. Long term work recommended about 5A.
Panel Mounting: 
1. Drill holes in the Panel 7mm 
2. Extended potentiometer handle 
3. Lock screw sleeve upper knob
 
Package Included
1 Pcs DC-DC Step Down Buck Converter Power Supply Module
 

 
XH-M401 DC-DC Step Down Buck Converter Power Supply Module XL4016E1 PWM Adjustable 4-40V To 1.25-36V Step Down Board 8A 200W
 
Description
Product name: DC step-down module Converter 
Voltage regulating mode: PWM modulation 
Input voltage: DC4-40V 
Output voltage: DC1.25-36V 
Max output current: 8A (more than 5A for long time use,need Fan if over 5A) 
Max power: 200W 
Conversion efficiency: 94%  
Switching frequency: 180KHZ 
Dimensions: 61*41*27mm 
Chip: switching regulator Regulating chip XL4016 with Over current protection, Over temperature protection,Short circuit protection.
When reach maximum output current 8A, need to add fan. Long term work recommended about 5A.
Panel Mounting: 
1. Drill holes in the Panel 7mm 
2. Extended potentiometer handle 
3. Lock screw sleeve upper knob
 
Package Included
1 Pcs DC-DC Step Down Buck Converter Power Supply Module
 

 
XH-M401 DC-DC Step Down Buck Converter Power Supply Module XL4016E1 PWM Adjustable 4-40V To 1.25-36V Step Down Board 8A 200W
 
Description
Product name: DC step-down module Converter 
Voltage regulating mode: PWM modulation 
Input voltage: DC4-40V 
Output voltage: DC1.25-36V 
Max output current: 8A (more than 5A for long time use,need Fan if over 5A) 
Max power: 200W 
Conversion efficiency: 94%  
Switching frequency: 180KHZ 
Dimensions: 61*41*27mm 
Chip: switching regulator Regulating chip XL4016 with Over current protection, Over temperature protection,Short circuit protection.
When reach maximum output current 8A, need to add fan. Long term work recommended about 5A.
Panel Mounting: 
1. Drill holes in the Panel 7mm 
2. Extended potentiometer handle 
3. Lock screw sleeve upper knob
 
Package Included
1 Pcs DC-DC Step Down Buck Converter Power Supply Module
 

 
 
220V TO 3.3V 5V 9V 12V 15V 24V 2.6W/3W Supply Module AC-DC 220 to 3.3V Small Volume Isolated Switching Power PLB03A X4421
 
 
 
Description
1. The product is easy to install, can be used directly on the motherboard board.
2. Universal universal input voltage: 85-264V AC or 110-370V DC.
3. High output voltage accuracy.
4. Input and output high isolation.
5. Overcurrent protection, short circuit protection and temperature protection.
Product parameters:
AC input (VAC): 85-264
DC input (VDC): 110-370
Frequency range (Hz): 47-63
Input current (A): 0.3 / 115VAC 0.15 / 230VAC
Surge current (A): cold start 10A / 230VAC
Standby power consumption (mW) ≤100mW / 230VAC
Output voltage: 3.3V
Output voltage accuracy: ± 1%
Rated current: 1.2A
Rated power: 3W
Working temperature: -30-70 ℃
Working humidity: 20-90% , no condensation
Switching frequency: 5-65
Product Size: 4 * 1.5 * 1.8cm
 
Package Included
1 Pcs 3.3V1.2A Switching Power Supply Module
 

3 AA Battery Holder Box Case with Switch New 3 AA 4.5V Battery Holder Box Case with Lead Transparent Box
 
 
 
 
Description
Material: Hard plastic
Battery type: 3 pcs AA Battery Case Holder
AA Battery Holder Case with wire leads for soldering / connecting
Keep your batteries organized and protected
With ON/OFF switch
Size: app.6.6cmx4.7cmx1.8cm/2.6''x1.9''x0.7''
Color: Transparent
 
Package Included
1 Pcs Battery Box Holder (Batteries are not included.)
 

Dear buyer friends, thank you for your support, the connection method of this battery box is parallel, but because the shell is modified by series (so there is a series mark). When you receive the battery box, be sure to use it in parallel connection.
 
18650 Power Bank Cases  2 18650 Battery Holder Storage Box Case 18650 Parallel Battery Box
 
Description
Model: high quality 18650 boxes, 2 sections, 3.7V
Material: PP soft rubber material
Spring: nickel plated steel
Rivet: Brass
Wire: 1007 × 24awg
Exposed wire length: 150 mm
Color: Black
Note: two 18650 lithium batteries can be installed. The output voltage is 3.7V. After the battery is installed, please do not touch the red and black together. It can be fixed with screws. Screws are not included.
 
Package Included
1 Pcs 18650 Parallel Battery Box
 

 
WS2812B Module Strip 24 Bits 24 X WS2812 5050 RGB LED Ring Lamp Light With Integrated Drivers Ws2812 RGB 24
 

 
Description:
Voltage:DC4-7V
Communication  interface:Single-wire communication
LED Chip:WS2812B
Inside Diameter :7.2 cm
Outside Diameter: 8.5 cm
 
Conncetion:
5V to 5V
pin 6 to DI
GND to GND
 
Package Included:
1 Pcs 24 X WS2812 5050 RGB LED
 

 
ESP8266 ESP-01 5V WiFi Relay Module Things Smart Home Remote Control Switch For Phone APP ESP01 Wireless WIFI Module
 
 
Description:
Plus a ESP-01 Module, the intelligent relay module based on ESP-01 WIFI module design, can be used for DIY their own smart switch, you can remotely through the mobile APP control, providing APP and LUA source. Easy to use, easy to use.
 
Features:
* Module operating voltage: DC 5V
* Relay load capacity: 10A 250VAC 10A 125VAC 10A 30VDC 10A 28VDC
 
Application:
1. Wiring: Connect the relay terminals to the equipment to be controlled, such as lights and fans. The The The
2. burn program: use the site to provide the downloader, a key to download. Andrews and LUA Source:
https://pan.baidu.com/s/1pLwkH3X
3. mobile phone connected to ESP-01S issued a hot spot, open the phone APP: ESP8266 Controller, set the IP address: the default 192.168.1.1
 
Package Included:
1 Pcs ESP8266 5V Wifi Relay Module TOI APP Controled For Smart Home ESP-01
 

 
XH-M145 original high resolution digital amplifier in class D audio amplifiers DC12V HD YDA138-E
Stereo amplifier board 12W 12 W, the overall layout is neat and reasonable, beautiful appearance. Sound sweet, very suitable for making small amplifiers. Strong ability to hands-on friends can choose to install their own active crystal oscillator LC capacitance, the upgrade potential is very large, cost-effective!
Description:
1.The power amplifier board imported original chip YD138-E chip, the chip has over-current protection, thermal protection, noise reduction and so on.
2.Wide voltage range, DC 9-14V, current 2A and above can work normally.
3.Power powerful, large dynamic range, small cries, as large as cannon, can be very good performance, very small distortion. 8 European load is 2 * 8W, 4 European load is 2 * 12W.
Package included:
1 Pcs XH-M145 power amplifier board
 
 

 
2S 18650 Lithium Battery Heat Holder Bracket 18650 Spacer Assembly Group Module DIY Battery Box Case Pack Splicing Bracket
 
Description
Commodity name: 18650 error bracket
Specification: 2 units
Length: 39MM
Size: Pitch: 19.5MM, Aperture: 18.4MM, Row pitch: 16.8MM, Thickness: 8MM
Purpose: Mainly used for battery packs with 18650 dislocation arrangement, suitable for battery packs with limited space and limited size, or battery packs with irregular shapes.
Features: 18650 dislocation bracket occupies a small space and makes full use of space. Compared with the battery pack without a bracket, it has strong integrity, simple operation, convenient spot welding, time-saving and labor-saving, convenient spot welding, no need for other fixtures to fix, the nickel strip can be used as a whole The nickel strip is flat and spot welded to make the battery pack stronger.
Others: In order to save more space, the wall thickness of the dislocation bracket is designed to be particularly thin. The thinnest position is only 0.4mm, so it will be easy to break. It is not as strong as the ordinary bracket, and it is not because of the material. There are advantages and disadvantages.
 
Package Included
10 Pcs 18650 Lithium Battery Heat Holder Bracket

Water flow sensor flowmeter Hall flow sensor Water control 1-30L/min 2.0MPa YF-S201
 
Description:
Scope: Suitable for water heaters, credit card machines, water vending machines, and other flow measurement devices!
Product Features:
1, the product appearance lightweight flexible, small size, easy to install.
2, inlaid with stainless steel impeller shaft, always wearable.
3, the seal with the upper and lower force structure never leaks.
4, the Hall element imported from Germany, and use potting package, prevent water, never aging.
5, all the raw materials are in line with ROHS testing standards
 
Introduction:
Water flow sensor is mainly made of a plastic body, the rotor assembly and a Hall flow sensor.
Water heater which is mounted on the end, for detecting the water flow, the water passes through the water when the rotor assembly,
Magnetic rotor and change as the flow speed, the Hall sensor output corresponding pulse
Signal, the feedback to the controller, the controller determines the size of the water flow, for control.
Caution:
Non-violent shock, and chemical erosion.
Non-throwing or hitting.
Mounted vertically, does not exceed 5 degrees inclination.
Medium temperature should not exceed 120'C.
 
Output waveform: square wave
Lead by:
  Red IN connector positive
  Yellow OUT signal output line
  Black GND then negative
 
YF-S201 Frequency: F = 7.5 * Q (L / Min) error: ± 2% voltage :3.5-24VDC, current can not exceed 10mA, finished a liter of water flow pulse output 450
 
Basic parameters
1, the lowest rated working voltage DC4.5 5V-24V
2, the maximum operating current of 15 mA DC 5V
3, the working voltage range DC 5 ~ 18 V
4, load capacity ≤ 10 mA (DC 5V)
5, temperature range ≤ 80 'C
6, using the humidity range 35% ~ 90% RH (no condensation state)
7, allowing less pressure pressure 1.75Mpa
8, Storage temperature -25 ~ 80'C
9, storage humidity 25% ~ 95% RH
 
Shipping list: 
1 Pcs YF-S201

Water flow sensor flowmeter Hall flow sensor Water control 1-30L/min 2.0MPa YF-S201
 
Description:
Scope: Suitable for water heaters, credit card machines, water vending machines, and other flow measurement devices!
Product Features:
1, the product appearance lightweight flexible, small size, easy to install.
2, inlaid with stainless steel impeller shaft, always wearable.
3, the seal with the upper and lower force structure never leaks.
4, the Hall element imported from Germany, and use potting package, prevent water, never aging.
5, all the raw materials are in line with ROHS testing standards
 
Introduction:
Water flow sensor is mainly made of a plastic body, the rotor assembly and a Hall flow sensor.
Water heater which is mounted on the end, for detecting the water flow, the water passes through the water when the rotor assembly,
Magnetic rotor and change as the flow speed, the Hall sensor output corresponding pulse
Signal, the feedback to the controller, the controller determines the size of the water flow, for control.
Caution:
Non-violent shock, and chemical erosion.
Non-throwing or hitting.
Mounted vertically, does not exceed 5 degrees inclination.
Medium temperature should not exceed 120'C.
 
Output waveform: square wave
Lead by:
  Red IN connector positive
  Yellow OUT signal output line
  Black GND then negative
 
YF-S201 Frequency: F = 7.5 * Q (L / Min) error: ± 2% voltage :3.5-24VDC, current can not exceed 10mA, finished a liter of water flow pulse output 450
 
Basic parameters
1, the lowest rated working voltage DC4.5 5V-24V
2, the maximum operating current of 15 mA DC 5V
3, the working voltage range DC 5 ~ 18 V
4, load capacity ≤ 10 mA (DC 5V)
5, temperature range ≤ 80 'C
6, using the humidity range 35% ~ 90% RH (no condensation state)
7, allowing less pressure pressure 1.75Mpa
8, Storage temperature -25 ~ 80'C
9, storage humidity 25% ~ 95% RH
 
Shipping list: 
1 Pcs YF-S201

1.53 /
(Only Heat Sink)DC-AC 500W Inverter Boost Board Transformer Power DC 12V TO AC 220V Car Converter Module(Only Heat Sink)
 
  
 
Description
Size: 76*22*60mm
 
Package Included
1 Pcs Heat Sink

 
 
 
12V battery sound and light alarm against over-discharge protection board, low voltage / under voltage protection module
Description:
First,the scope of the application of this module:
Mainly used for battery (9V or 12V) voltage monitoring, simple and practical, all sound and light alarm.
Second, product function:
After the battery is under the pressure of the buzzer to send "drop" of the sound, while the red LED indicator lights up, when the battery voltage from the set up to more than the setting value, the buzzer alarm.
Two, brief description:
1, size: 2.9CM*3.0CM
2, the main chip: LM358;
9V battery: when the battery has been placed (battery voltage lower than 8V), the red indicator lights up and the buzzer is called, to achieve sound and light alarm, so as to achieve the battery discharge state, in case of battery is too discharge, damage to the battery;
12V battery: when the battery has been placed (battery voltage lower than 10.4V), the red indicator lights up and the buzzer is called, to achieve sound and light alarm, so as to achieve the battery discharge state, in case of battery is too discharge, damage to the battery;
Advantages:
1, with sound and light alarm, there is no protection of the direct and clear;
2, input module with reverse connection protection, input power supply polarity will not burn. But there is no overvoltage protection, if the input is over 15V, it will burn out the chip module.
 
Package Included:
1 Pcs 12V Battery Protection module
 

125khz RFID EM4100 TK4100 Key Fobs Token Tags Keyfobs Keychain ID Card Read Only Access Control RFID Card
Description:
 
Chip: EM4100 / TK4100
 
Weight: 5g 
 
Size:3.5 x 2.8 x 0.4cm
 
Material: Plastic abs
 
Operation frequency: 125Khz
 
Detecting distance: 3-10cm
 
Read only 
 
Compatible with Door Entry system
 
Easy to carry
 
Water resistant
 
Each token pre-programmed with unique ID which is printed on it
 
Each comes with Key ring included
 
Compatible with all 125khz RFID reader to gain access
 
No external power required.
 
Brand new key inductive card for entrance guard system.
 
It applies to access control, hotel locks, staff attendance and school campus access and payment control, identification and security systems, parking lot entry and payment, social security management, transportation payment, municipal and ancillary service payment
 
Package Include:
10 RFID Key-fobs