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Embed version of Mega 2560 CH340G/ATmega2560 - compatible with Arduino Mega 2560 board. Built on the Atmel ATmega2560 microcontroller and USB-UART interface chip CH340G.
Board have compact size 38x55mm. It is good solution, to make your final project on solder proto-board.
Board for functionality similar to the Arduino Mega 2560. It is embed board, but the same stable, and uses the original chips ATmega2560 (16 MHz).
The board used the chip CH340G as converter UART-USB. When you work in the frequency 12Mhz, giving a stable result of data exchange (need install drivers to computer).
Mega PRO (Embed) 2560 CH340G / ATmega2560 - connects to the computer via microUSB cable (used for almost all Android smartphones).
You can supply power to board through the MicroUSB connector or to power pinheaders. The voltage regulator (LDO) can deal with incoming voltage from 6V to 9V (peack 18V) DC. Output current for 5V - about 800mA, for 3.3V - about 800mA (Please note that the higher the input voltage the lower the outgoing current). That will provide a reliable power most of your initial projects.

1, the current sensor chip ACS712ELC-050; ACS712ELC - 20; ACS712ELC - 30;
2, pin 5 v power supply, the onboard power light;
3 30A plus or minus current can be measured, module, the corresponding analog output 100 mv/A;
4, no current through testing, the output voltage is VCC / 2;
5, the size of the PCB board: 31 (mm) x13 (mm);

Features:
These are high quality, general purpose, miniature electrolytic capacitors for making circuit.
Convenient and practical use, very popular in electronic enthusiasts and amateurs.
This set includes 24 most popular types of capacitors which could meet your basic needs.
Safely packed and assorted in a plastic box for convenient use and storage.
Suitable for a wide range of electronic applications, quite good accessory for DIY.
 
Specifications:
Dielectric: Aluminum
Capacitance: 0.1UF-1000UF
Withstand Voltage: 50(V)
 Frequency: Low Frequency
 
0.1uF 50V 4x7 30pcs
0.22uF 50V 5x11 20pcs
0.47uF 50V 5x11 20pcs
1uF 50V 5x11 20pcs
2.2uF 50V 4x7 30pcs
3.3uF 50V 4x7 30pcs
4.7uF 50V 4x7 30pcs
10uF 25V 4x7 30pcs
10uF 50V 5x11 20pcs
22uF 16V 4x7 30pcs
22uF 25V 4x7 30pcs
33uF 16V 4x7 30pcs
47uF 10V 4x7 30pcs
 47uF 25V 5x11 20pcs
47uF 50V 6x11 15pcs
100uF 16V 5x11 20pcs
100uF 25V 5x11 15pcs
220uF 10V 5x11 15pcs
220uF 25V 6x11 15pcs
330uF 25V 8x12 10pcs
470uF 10V 6x11 10pcs
 470uF 16V 8x12 10pcs
680uF 16V 8x12 10pcs
1000uF 16V 10x16 10pcs

GY-21 HTU21D Temperature Humidity Sensor Breakout Board Module
The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor.
This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems.
All you need is two lines for I2C communication and you'll have relative humidity readings
and very accurate temperature readings as a bonus!
There are only four pins that need to be hooked up in order to start using this sensor in a project.
One for VCC, one for GND, and two data lines for I2C communication.
This breakout board has built in 4.7k pull up resistors for I2C communications.
If you're hooking up multiple I2C devices on the same bus, you may want to disable these resistors.
It's summer and you're sweating and your hair's all frizzy and all you really want to
know is why the weatherman said this morning that today's relative humidity would max
out at a perfectly reasonable 52% when it feels more like 77% .
Enter the HTU21D-F Temperature Humidity Sensor - the best way to prove the weatherman wrong!
This I2C digital humidity sensor is an accurate and intelligent alternative to the much simpler
Humidity and Temperature Sensor - SHT15 Breakout It has a typical accuracy of ±2% with an
operating range that's optimized from 5% to 95% RH. Operation outside this range
is still possible - just the accuracy might drop a bit. The temperature output has
an accuracy of ±1°C from -30~90°C. If you're looking to measure temperature more accurately,
we recommend the MCP9808 High Accuracy I2C Temperature Sensor Breakout Board.
 
Such a lovely chip - so we spun up a breakout board that includes the
Filtered version (the white bit of plastic which is a PTFE filter to keep the sensor clean),
a 3.3V regulator and I2C level shifting circuitry. This lets you use it safely with any kind
of microcontroller with 3.3V-5V power or logic. Each order comes with one fully assembled
and tested PCB breakout and a small piece of header.
You'll need to solder the header onto the PCB but it's fairly easy and takes only a few minutes even for a beginner.
Board size:1.2x1cm(approx)

Main features of power supply module:
*10-60v wide input voltage, suitable for most power supplies on the market as the input source.
*Output constant voltage and constant current, continuously adjustable voltage and current. Can meet most of the electrical equipment.
*High output power, good ventilation and natural heat dissipation can achieve 280W/12A (note that there are output power and output current limits).
*The module adopts a step rectification scheme, which has extremely high efficiency. The output voltage is above 10V and the efficiency is as high as 92% -96% .
*There is a constant current indicator when charging the battery. The charging status is clear at a glance.
*The input has a 15A fuse, and the positive and negative poles of the input will not damage the power supply (the fuse will be burned, and the fuse needs to be replaced)
Module parameters
Product model: SZ-BK0612
Module name: 400w step-down constant voltage and constant current
Module nature: non-isolated step-down module (BUCK)
Input voltage: 10.5-60V
Output voltage range: 0-45V (must meet the step-down condition, IN input is multiplied by 0.8)
Minimum output voltage: 0V ( 1V)
The highest output voltage: approximately equal to the input *0.8 (for example, the input is 40V, 40V*0.8=32V, the highest output voltage is 32V, which will actually be a little higher and reach about 34V.35)
Output constant current: 0.2-15A (continuously adjustable, heat dissipation should be strengthened if it exceeds 12A)
Maximum output power: 400W (a fan needs to be added for forced cooling of the heat sink and magnetic ring)
Continuous maximum working power: 280W (under ventilated environment)
Continuous maximum working current: 12A (under ventilated environment)
Input under-voltage protection: Yes, (input is lower than 10.5V to turn off the output, there is an error of about 0.5V)
Input overvoltage protection: none (overvoltage is prohibited)
Working temperature: -10~ 85 degrees (enhance heat dissipation when it exceeds 65 degrees)
Working frequency: 100KHz
Conversion efficiency: up to 97% (efficiency is related to input, output voltage, current, and pressure difference)
Short circuit protection: Yes (constant current protection)
Input reverse connection protection: Yes (please be careful when short-circuiting the input and the input reverse connection will burn the input fuse)
Output anti-recharge: none (to charge the battery, output connect inductive load, for example, anti-reverse diode must be added to the motor)
Work indicator: Yes (blue LED light)
Constant current indicator light: Yes (the CC indicator red light on the small board lights up when the constant current is working, there is no current output, and the light does not light up when the voltage is constant)
Connection method: Comes with welding-free 25A terminal block
Module size: length 60 width 60mm high 45mm
Net weight: 170 grams. 180 grams with packaging.
Packing method: independent carton packaging.
Wiring: "Input/IN" is input. "Output/OUT" is output (marked in Chinese)
 
Precautions:
*It is strictly forbidden to connect the input and output positive and negative poles (the fuse will be burnt if the input is reversed, and the control board will be damaged if the output is reversed. The damage of the small board cannot be repaired and can only be replaced.
*The control panel is a little rainproof glue, if it is damaged, it can only be replaced. Mind shooting carefully
*When charging the battery, when the output is connected to an inductive load, the output should be equipped with an anti-reflow diode
 
Voltage and current adjustment method: (use tool multimeter, flat-blade screwdriver)
Voltage adjustment: Turn the "CV" blue potentiometer on the power supply board according to the voltage you need to increase the voltage clockwise and decrease it counterclockwise
Output current adjustment: Set the multimeter to the 20A or 10A current position, adjust the power supply voltage to 5V, turn the constant current potentiometer "CC" 20 times counterclockwise, adjust the current to the minimum, use the multimeter to short-circuit the output, and then adjust clockwise The "CC" potentiometer adjusts the current to the required current value. (Note: When the constant current potentiometer "CC" rotates 20 times counterclockwise, the power supply may have no output voltage. At this time, the current is adjusted to 0A. No need Regardless of him, turn the current clockwise to increase the output and there will be output.)
The module's current detection is low-end detection. Please do not short-circuit the negative input and output negative directly with a wire. Short-circuit the negative power supply without constant current, which will damage the power supply and electrical equipment that requires constant current.
The module is a step-down power supply that can only step down but not up. The input voltage must be higher than the output voltage.

MQ-135 Air quality and hazardous gas detection sensor alarm module MQ135 module

DFPlayer Mini is a small and cheap MP3 module, can be directly connects the speaker. Module with battery power supply, speaker, keys can be used alone, can also be via a serial port control, as the UNO or anything with a serial port of single chip microcomputer a module. Perfect integration module itself hard to decode MP3, WAV, WMA. Software support TF card drive at the same time, support the FAT16, FAT32 file system. Through a simple serial port can play the specified music instruction, and how to play music, and other functions, without tedious underlying operating, easy to use, stable and reliable.
 
Introduction
1, support the sampling rate (KHz) : 8/11.025/12/16/22 05/24/32/44.1/48
2, 24 bits DAC output dynamic range support: 90 db, SNR support: 85 db
3, fully support the FAT16, FAT32 file system, the largest support 32 gb TF card, support 32 gb usb flash drive, 64 m byte NORFLASH
4, a variety of optional control mode. IO control, serial port, AD button control mode
5, radio call waiting function, there is background music can be suspended. Advertising is back in the background continue to play
6, audio data according to the folder, maximum 100 folders, every folder can be allocated 255 tracks
Class 7, 30 volume is adjustable, 6 EQ is adjustable
 
Feature
1, vehicle-mounted navigation speech
2, highway transportation inspection, toll station voice prompt
3, railway station, bus station security check voice prompt
4, electric power, telecommunication, finance, business hall voice prompt
5, vehicle into and out of channel to verify voice prompt
6, * * voice prompt frontier inspection channels
7, multi-channel voice alarm or equipment operation guide voice
8, electric sightseeing car security speech notices
9, electrical and mechanical equipment failure alarm automatically
10, fire fighting voice alarm prompt
11, automatic broadcasting equipment, broadcast regularly

Amplifier Chip:TPA3110
Output Power:15W x 2
Working Voltage: DC 8-18V
Working Current: 
Max:3A 
Static state:8mA
Efficiency:≥90%
SNR:100dB
Frequency Range:20Hz-20KHz
Size: 33 x 25 x 3.5mm
Speaker:4-8Ω
Net Weight:about 4g

Wireless Standard:802.11b/g/n
Frequency Range:2.4GHz-2.5GHz(2400M-2483.5M)
Data Interface:UART/HSPI/I2C/I2S/Ir Remote Control/GPIO/PWM
Operating Voltage:3.0-3.6V(We recommended 3.3V)
Operating Current:Average 80mA
Operating Temperature:-40~125°
Wireless Network Mode:station/softAP/SoftAP station
Safety Mode:WPA/WPA2
Encryption Type:WEP/TKIP/AES
Network Protocol:IPV4,TCP/UDP/HTTP/FTP

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www.17track.net/en

 1, Operating voltage 5V
2, Output wavelength 650 nm
3, With fixed bolt hole for easy installation

Main characteristics
* Zero false alarm rate
*Real-time response
* Correct data
* Minimum distinguishable particle diameter :0.3 micrometer
*High anti-interference performance because of the patent structure of six sides shielding
*Optional direction of air inlet and outlet in order to adapt the different design
Overview
PMS5003 is a kind of digital and universal particle concentration sensor, which can be used to obtain the number of suspended particles in the air, i.e. the concentration of particles, and output them in the form of digital interface. This sensor can be inserted into variable instruments related to the concentration of suspended particles in the air or other environmental improvement equipments to provide correct concentration data in time.
Working principle
Laser scattering principle is used for such sensor, i.e. produce scattering by using laser to radiate suspending particles in the air, then collect scattering light in a certain degree, and finally obtain the curve of scattering light change with time. In the end, equivalent particle diameter and the number of particles with different diameter per unit volume can be calculated by microprocessor based on MIE theory. Please find the functional diagram of each part of sensor from Figure 1 as follows.
 

    MPU-6500 module (three-axis gyroscope triaxial accelerometer)
 
Module Model: GY-6500
 
 
 
Use chip: MPU-6500
 
Power supply: 3-5v (internal low dropout regulator)
 
Communication: standard IIC / SPI communications protocol
 
-Chip 16bit AD converter, 16-bit data output
 
Gyroscopes range: ± 250 500 1000 2000 ° / s
 
Acceleration range: ± 2 ± 4 ± 8 ± 16g
 
The use of Immersion Gold PCB, machine welding process to ensure quality
 
2.54mm pitch
 
Module size 15mm * 25mm

The balance board is suitable for  the li-ion battery pack BMS WHICH without  balance function,so as to  equalizing charge lithium battery charge function, make the battery pack each series charge at the same time.
 
Note:The balancing board must need BMS to use together,and the BMS is without balancing function
 
Parameter:
Balance Voltage for each single cell: 4.2V
Balance current for each single cell :66mA
Size: L25mm*W22mm
Balancer is just a Auxiliary function, The balancing means when the battery charging,each series battery need with the same voltage.when ONE cell voltage get 4.2V ,the other cells not, the first cell voltage will discharge to wait the other cells rising to the same level.
 
Note:
battery internal resistance differences within 5 milliohm, voltage within 0.03 V voltage, capacity vary within 50 ma
 
Cut-off  Voltage is according to the BMS setting.
 
Note:the balancer starts balancing when the one cell get 4.2V, The Cut-off  Voltage is according to the BMS setting,but the bms cut-off voltage needs more than 4.25V which is much better.
 
4S  Cnnection instruction:
 
B4    Connect battery positive;
B3    Connect the point between battery 1 and battery 2;
B2    Connect the point between battery 2 and battery 3;
B1    Connect the point between battery 3 and battery 4
B-     Connect battery negative;

http://mh.nodebb.com/topic/44/mh-et-live-max30102-pulse-oximeter-and-heart-rate-sensor

 
Parameter: Model: XK-GK-4010A Operating voltage: Input: 12 V output: 12 V Output type: Double output Detection range: adjustable 10-50 MM Detection principle: distance Power load: 36 W Delayed off time: none Field of application: DC, constant pressure Load current: 3A optional Standby current: 10mA VIN: 12V Feature: The use of electrical appliances, such as small household appliances, KTV VOD system, Automotive industrial application systems and other electrical devices wide range of guests can accept custom special features; The sensitivity of the product can be customized, can penetrate plastic, acrylic, glass, ceramic, and other non-metallic medium, stable performance! Instruction: AC use: Need to apply reactive rectifier for it is DC, constant pressure. During installation, make sure that the medium insulation and tactile surface are tightly coupled and fixed! There shoule no gap! Installed and then power, wait 3 seconds after initialization, it may be normal operation! 2. Recommended method of installation: The first, the shell design a card slot, the touch button can be put in firmly locked. The second, the use of hot melt adhesives, the touch button and shell close to the adhesive hot melt can be used to live. The third, the use of double-sided adhesive, directly touch the stickers inside the shell.

CJMCU FT232H USB to JTAG UART/FIFO IIC I2C Typical Applications Single chip USB to UART (RS232, RS422 or RS485) USB to FIFO USB to FT1 248 USB to JTAG USB to SPI USB to I2C USB to Bit-Bang USB to Fast Serial Interface USB to CPU target interface (as memory) CJMCU-FT232H is a single channel USB 2.0 Hi-Speed (480Mb/s) to UART/FIFO IC. It has the capability of being configured in a variety of industry standard serial or parallel interfaces. The FT232H has the following advanced features: Single channel USB to serial / parallel ports with a variety of configurations. Entire USB protocol handled on the chip. No USB specific firmware programming required. USB 2.0 Hi-Speed (480Mbits/Second) and Full Speed (12Mbits/Second) compatible. Multi-Protocol Synchronous Serial Engine (MPSSE) to simplify synchronous serial protocol (USB to JTAG, I2C, SPI (MASTER) or bit-bang) design. UART transfer data rate up to 12Mbaud. (RS232 Data Rate limited by external level shifter). USB to asynchronous 245 FIFO mode for transfer data rate up to 8 Mbyte/Sec. USB to synchronous 245 parallel FIFO mode for transfers upto 40 Mbytes/Sec Supports a proprietary half duplex FT1248 interface with a configurable width, bi-directional data bus (1, 2, 4 or 8 bits wide). CPU-style FIFO interface mode simplifies CPU interface design. Fast serial interface option. FTDI's royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers eliminate the requirement for USB driver development in most cases. Adjustable receive buffer timeout.

Size: 46 mmx23mmx10mm / 1.81 \ "x0.91 \" x0.39 \ "(inch) (approx)
 
The Features:
1. The Fixed turn the lamp current to 0.1 times the value of the constant current (at the when 2 identify been the 'is full);
2. Increased input reverse polarity for protection, diode;
3. Using dedicated reference for IC, and high - precision from the resistor, so that the constant current is more stable, (20 degrees to 100 degrees, the constant current 1 a, when the temperature drift of less than 1% ).
 
Particularly suitable for the LED driver
* High - power LED constant current drive
* Lithium 'charger (o ferroelectric)
* 4 v, 6 v, 12 v, 14 v, 24 v 'charger
* Nickel cadmium, Nickel metal hydride 'pack charger
For * Solar panels and wind turbines
 
Specifications:
* the Module Properties: non - isolated constant current and voltage of the Module
* Rectification: non - synchronous Rectification
* Input voltage: 7 v - 35 v
* the Output voltage: 1.25 V - 30 V
* the Output current: adjustable maximum 3 a
* Conversion efficiency: 92% (the highest)
* Switching frequency, 150 KHZ
* the Output ripple: 50 mv (Max) 20 m bandwidth
* the Load Regulation: plus or minus 0.5%
* Voltage Regulation: plus or minus 2.5%
* Operating Temperature: - 40 ° to 85 °
 
'the use:
* Make sure of the voltage and current of the 'you need to charge
* Adjust the constant voltage potentiometer to make the output voltage same to the charge voltage
* Potentiometer Adjustment Direction: Clockwise (happens), counterclockwise (decrease)
* Use the multimeter in 10 a current scale to measure the output short - circuit current, and adjust the current potentiometer to make sure the output current to the expected charging current value
* The charge current of transfer lamp is The default 0.1 times of The charging current (constant current value)
* Connected to the 'and try to charging (for previous five steps, the module input terminal is Connected to the power source, the output load is NOT Connected to batteries).
 
LED Constant Current Driver Use:
* Make sure operating current and Max operating Voltage of the LED you need to drive.
* Adjust the constant voltage potentiometer to make sure the output voltage is up to the LED Max operating voltage.
* Use the multimeter in 10 a current scale to measure the output short - circuit current, and adjust the current potentiometer. To make sure the output current to the expected LED operating current.
* Join the LED test (For the above three steps, the module input terminal is connected to the power source, the output load is NOT connected to the LED).
 
The scope of application:
Charging for lithium ion batteries: the when the lithium ion 'voltage is low. If use the constant voltage Charging directly. Due to pressure is too large, leading to the' damage. So from the beginning to use the constant current Charging. When Charging the to a certain, automatic switch back to the constant voltage Charging.
 
Charging curve as to: red is current, blue is voltage.
 
 

NOTE:
1) this board is not suit high power electronic tools, if use for screwdrier and drill, please don't buy
2)Above 3A device,means the battry discharge rate is more than 3C.
1C rated battery, 2000mah equals 2ah*1=2A max working current.
3C rated battery means 2ahx3=6A Max working current.
Features:
1) high-accuracy voltage detection circuit;
2) terminal of the charger using high voltage device;
3) Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit);
4) MOS transistor can control the battery charge and discharge;
5) low standby current consumption.
4S LI-ION BMS ParameterS:
Over Charge Voltage:4.25-4.35v±0.05v
Over Discharge Voltage: 2.3-3.0v±0.05v
Max working current:10A
Max Peak current:20A
Working Temperature:-40--- 50
Storage Temperature:-40-- 80
Small current:6uA
Life cycle:50000hours
Resistance:45mΩ
Short cut Protection:Protectable ,change for repair Size:35*35*3.0mm

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SMD LED -5050 RGB
Full Color - Red /Green/Blue
COMMON ANODE
SIZE:5.0*5.0*1.5 mm
HUE:620-625/520-530/460-475nm
Ref: 2.0-2.6/3.0-3.4/3.2-3.6 v
Low-Mid Power LED
I(Ma):60ma 
3-CHIP LED PLCC-6
QTY:1000PCS

Features: 
The onboard two set power supply interface VCC5 5V power supply, VCC4 interface, 3.5--4.5V power supply, optional power on self starting (default) and control start.
The onboard SMA (default) and IPXmini antenna interface, SIM900A interface reserved reset.
The size of the module is 49*50, all the new and original device.
The computer can give early computer debugging USB module power supply, a very large amount of data under the condition of the recommended current more than 1A. Standby dozens of MA data can be set to provide dormancy, dormancy of 10MA low power. Support 2, mobile phone 3,4G card.
The serial port circuit: support for 3.3V single chip microcomputer. TTL serial port support
3.3 and 5V single chip microcomputer.
The SIM card circuit to increase the SMF05C ESD chip.
Antenna circuit: guarantee short and straight, so as to ensure the signal strength.
PCB display screen printing mark: each interface, convenient development two times, the SIM900/A hardware is completely follow the design when the design manual.
Two power supply interface: VCC5, 5V DC above 1A. Computer 5V power supply can be early computer USB. DC long data circuit over larger recommended 5V1A. VCC4, 3.5--4.5V power supply, ibid., suitable for lithium battery.
Control pin all leads.
A TTL level, compatible with 3.3V and 5V.
The two antenna interface, the default SMA straight head, connector for IPXmini antenna.
One way of speech interface, the way Mike interface.
The control interface of each pin description:
GND - GND
SIMR SIM900A RXD, TTL level, can not be directly connected to the 232 level
SIMT SIM900A TXD, TTL level, can not be directly connected to the 232 level
RST - SIM900A reset, active low
VCC_MCU when the SIM900A module and 5V TTL level communication, this pin is connected to DC 5V; when the level of communication of SIM900A and 3.3V TTL, this pin is connected to DC 3.3V.
VCC5----DC 5V input.
VCC4------DC3.5--4.5 input
Onboard Resources:
Serial port circuit(with protection)
Antenna interface circuit(SMA bend female port)
SIM card circuit(flip SIM slot)
4*3.5 fixture hole 4pcs
SIM900A serial port output terminal
Specifications:
Size:49mm x 47mm
Net Weight:28g
Weight: 38g 
Package Included:
1 x SIM900A V4.0 kit
1x Power Cable
1x Antenna

 
SGP30 is a metal oxide gas sensor with multiple sensors on a single chip. It integrates four gas sensors and has a fully calibrated air quality output signal. In addition, SGP is easy to integrate and can integrate metal oxide gas sensors into mobile devices, opening up new possibilities for environmental monitoring in smart home, home appliances and Internet of Things applications.
 
Specification
Working power supply voltage: upgraded version 1.8-5V, old version 1.62V-1.98V
Power consumption: 40MA
Size: 12 mm x 12 mm x 1.6 mm
Interface type: I2C

Product Introduction
    JDY-23 transparent transmission module is based on Bluetooth 5.0 protocol standard, working frequency range is 2.4GHZ range, modulation mode is GFSK, maximum transmission power is 4db, maximum transmission distance is 60 meters, adopts imported original chip design, supports users to modify equipment through AT command Instructions such as name and baud rate are convenient and quick to use.
 
The JDY-23 Bluetooth module can realize module and mobile phone data transmission. By default, BLE Bluetooth can be used for product application without configuration.
 
 Make BLE faster and easier to use in products
 
Module Parameter Details
JDY-23 product parameters                                                        
model

JDY-23
Working frequency

2.4G
Transmit power

4db(maximum)
  Communication    Interface

UART
  Operating              Voltage

1.8V - 3.6V
Operating temperature

-40° - 80°
antenna

Built-in PCB antenna
  Receiving              sensitivity

-97dbm
Transmission distance

60 meter
  Master-slave        support

Slave
Module size

19.6 * 14.94 *1.8 mm(Length, width and height)
Bluetooth version

BLE 5.0(Compatible with BLE4.0, BLE4.2)
Awakening state current

800uA(Broadcast)
Light sleep state current

<50uA (Broadcast)
  Deep sleep            current

9uA (No broadcast)
  Instruction            parameter              saving

Parameter configuration power-down data is saved
SMT soldering temperature

<260°
rf-TX/RX peak current

5mA

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MODEL   NAME :   LATWT470RELZK   LED
 Manufacturer  :   1LG
Origin :  Korea
 Package  Model:Loaded Quantity  3600PCS  Per  Reel
  Forward Current      (IF ):  400mA
  Pulse Forward  Curren t1     (IFp): 650mA
  Reverse  Current    (IR): 25mA
  Reverse Voltage   (VR):  0.8-1.2V  (5mA)
  Power Dissipation  (PD):  1460mW
  Operatin  Tgemperature   (Topr):   -30 -   90 °C
Storage Temperature   (Tstg):  -40  -   100 °C
  Soldering Temperature     (Tsld):  Reflow Soldering:260 °C
for 10secs
Hand Soldering:350 °C
for 3secs
  Junctio  Tnemperature   (Tj ):  135°C
  Forward  Voltage   (VF):   3.05-3.65V (250mA)
  Luminous Flux    (LM):     lm   (20mA)
Luminous  Intensity  ( IV ) :  23.5cd  (250mA)
  Wavelength    (nm) :  -nm       mA
  CIE : x=0.2960   y=0.2770   (250mA)
  Color Correlated Temperature    (CCT):
  CRI  :   80°
  Viewing angle :  120°
  Lead Frame Type LED Package:  3.5×2.8×0.60mm    L×W×H    d=2.0mm

Description:
Used in conjunction with the Duemilanove ProtoShield prototype expansion board, the circuit is used to build a prototype, can be directly soldered components on the board, you can also connect the above mini breadboard circuit. Bread board and circuit board via double-sided adhesive connections, sold bread board and the circuit board are separated.
 
ProtoShield prototype expansion board with two buttons and two LED circuit can be used directly, all of the pins and the power leads are very fit and build circuit prototyping with Ardui-no.

Application:
This module can be applied to fields in the input voltage is higher than the step-down output voltage, such as batteries, power transformers, DIY adjustable power supply, 24V Car T of the power equipment industry buck, 12V switch 3.3V, 12V switch 5V, 24V switch 5V, 24V switch 12V, 36V 24V turn and so on.
Parameters:
Product size: 54mm * 24mm* 15mm  (l x w x h)
Colours:Blue        Package Weight: :15g/pcs
Materials: FR4 electronic components
Name: XL4015  5A ADJ DC - DC Step-down power Module ( Step Down Adjustable )
 

5S 21V 4.2V Balance Function Protection Board 68mA 5S Li-ion Lipo Battery Lithium 18650 Batteries Balanced Module BMS PCB

Warm prompt:
 
Dear buyer, Our cheapst transportation services Econmic category logistics (SunYou Economic Air Mail , China post Ordinary Small Packet Plus) can be traced only befor it arrive your country , please choose Standard category logistics if you want a full tracking info.
 
For example:
like this

SMD LED -5050 YELLOW
SIZE:5.0*5.0*1.5mm
CAT:800-1200mcd
HUE:580-590nm
REF:2.0-2.6v
QTY:1000pcs
I(MA):60ma

Features: Electric Socket Wall AC Power Outlet Voltage Detector Sensor Tester Pen 90-1000V The next generation AC non-contact voltage testers are easy to use — just touch the tip to a terminal strip, outlet, or supply cord. When the tip glows red and the unit beeps, you know there is voltage present. Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized circuits in the workplace or at home.
A perfect tool kit for home and electric industry uses Ideal design for testing power cables, circuit breakers, wall sockets, junction boxes, fuses, etc Just press the button, white LED light can be always on when there is absence of voltage "Beep" sound and red flashing LED would indicate the presence of voltage Totally insulated, no exposed metal or conductive parts Long life and low power consumption Compact, safety, & easy to carry Specifications:
Frequency Range: 50 to 500 Hz
Test Voltage Range: 90-1000V AC
Safety Rating : CAT II 1000v Powered By: 2 x AAA Batteries (Not included)
Material: ABS Plastic Item
Size: 152*23*15mm
 

MAX7219 digital display control module
 
MAX7219 is an integrated serial input / output common-cathode display driver, which connects the microprocessor 7-segment digital LED display with 8 digits, you can connect a bar graph display or 64 independent LED. On which includes a B-type BCD encoder chip, multi-channel scanning loop, segment word driver, but also an 8 x 8 static RAM for storing each data. Only one external register is used to set the segment current for each LED.
 
A convenient four-wire serial interface can connect all the general-purpose microprocessor. Each data can be addressed in the update does not need to rewrite all of the display. MAX7219 also allows users to select each data coding or non-coding.
The entire device contains a 150μA low-power shutdown mode, analog and digital brightness control, a scan-limit register allows the user to display 1-8 bit data, there is a LED light all the detection mode.
 
Only three IO ports to drive eight digital tube! Digital flicker-free display! Support cascade!
 
PCB plate fixed to the four corners of copper studs, which can effectively prevent a short circuit accident occurs!
 
Digital tube 0.36 inches four one common cathode LED
 
This module is compatible with 5V / 3.3V microcontroller (51 / AVR / STM32 .......)
 
Wiring instructions (in program provides an example, you can access any IO ports, you can modify the port defined in the program):
 
VCC → 5V
 
GND → GND
 
DIN → P00
 
CS → P01
 
CLK → P02
 
NOTES:
 
1.VCC and GND Do not reversed, it would burn chip
 
2.51 MCU P0 port need pull-up resistor, if your device does not have pull-up resistor can be connected to other ports data lines
 
Invoice:
 
1.MAX7219 digital display module 1
 
2. Straight pin 5P
 
3. bent pin 5P

Please receive this module and leave it in the environment with humidity greater than 80% for 12 hours to ensure the accuracy is restored.
The AHT10, a new generation of temperature and humidity sensors, sets a new standard in size and intelligence: it is embedded in a dual-row flat leadless SMD package for reflow soldering with a 4 x 5mm bottom and a height of 1.6mm.
The sensor outputs a calibrated digital signal in standard I 2C format.
The AHT10 is equipped with a newly designed ASIC-specific chip, an improved MEMS semiconductor capacitive humidity sensing element and a standard on-chip temperature sensing element.
Its performance has been greatly improved beyond the reliability level of previous generation sensors. The first generation of temperature and humidity sensors have been improved to make them more stable in harsh environments.
 
Characteristic:
1. Module size: 16*11 mm
2. Interface type: I2C
3. Working voltage: 1.8 - 6.0 V
4. Interface size: 4*2.54mm pitch
5. Humidity accuracy: typical ± 2%
6. Humidity resolution: 0.024%
7. Temperature accuracy: typical ± 0.3 ° C
8. Temperature resolution: Typical 0.01 °C
9. Working temperature: -40°C--85°C

Specifications:
Type: HJ12864ZW
Controller: ST7920
Display color: Blue
Character color: white
Other features: 5 v logic power supply, the parallel communication, high reliability, wide temperature range
Package Included:
10 X 12864 LCD Module

Applicable scope: Suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, without limitation on the dimensions) Product Size: 45*15*3.4mm (Standard), 48*20*3.4mm (Balancing) Charging voltage: 8.4V - 9.0V Continuous discharge current (upper limit): 20A (If the cooling environment is not good, reduce the load current use) Continuous charge current (upper limit): 10A Standard Edition: Suitable for starting drills with currents up to 25A below 50W, or resistive loads below 168W. Balanced version: Suitable for starting currents below 25A and below 50W power drills, or resistive loads below 168W, with balanced charging function. Note 1: The successful start of power drill requires two 10C-20C power batteries, or four 5C-10C power batteries (ordinary 18650 can not start drill! ! !); 0V and 8.4V cable, use 2 square mm Above copper wire (cannot use nickel plate!!!) Note 2: Connect 0V, 4.2V, 8.4V according to the diagram strictly. When connecting the battery for the first time, it needs to be charged before output. Note 3: When the battery is charged, “430” resistance heating is a normal phenomenon, indicating that the equalizing circuit is working; if the “430” resistance is also heating in the state of not charging, please check whether the wrong line is connected. For some customers with poor electronic foundation, please explain: Do not mix good batteries and bad batteries together! The capacity/internal resistance of 2 batteries should be as close as possible! (1 good battery 1 bad battery = 2 battery use effect).

Applicable scope: Suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, without limitation on the dimensions) Product Size: 45*15*3.4mm (Standard), 48*20*3.4mm (Balancing) Charging voltage: 8.4V - 9.0V Continuous discharge current (upper limit): 20A (If the cooling environment is not good, reduce the load current use) Continuous charge current (upper limit): 10A Standard Edition: Suitable for starting drills with currents up to 25A below 50W, or resistive loads below 168W. Balanced version: Suitable for starting currents below 25A and below 50W power drills, or resistive loads below 168W, with balanced charging function. Note 1: The successful start of power drill requires two 10C-20C power batteries, or four 5C-10C power batteries (ordinary 18650 can not start drill! ! !); 0V and 8.4V cable, use 2 square mm Above copper wire (cannot use nickel plate!!!) Note 2: Connect 0V, 4.2V, 8.4V according to the diagram strictly. When connecting the battery for the first time, it needs to be charged before output. Note 3: When the battery is charged, “430” resistance heating is a normal phenomenon, indicating that the equalizing circuit is working; if the “430” resistance is also heating in the state of not charging, please check whether the wrong line is connected. For some customers with poor electronic foundation, please explain: Do not mix good batteries and bad batteries together! The capacity/internal resistance of 2 batteries should be as close as possible! (1 good battery 1 bad battery = 2 battery use effect).

1 PCS H81 5V700mA (3.5W) Isolated Switch Power Supply Module AC-DC Buck Step-down Module 220V Turn 5V

Input voltage range: 6V to 32V
Output voltage: The default is 5V. After the fast charge is triggered, it is automatically adjusted between 3 and 12V.
Output Power. 24W (5V, 3.4A, 9V, 2.5A, 12V, 2A, etc.)
Output voltage wired compensation
Conversion efficiency: 90% to 97%
Supports multiple fast charging protocols
Input overvoltage, undervoltage protection
Input over-current protection
Output overcurrent and short circuit protection
Over temperature protection
 
Support fast charging protocol
for BC1.2, iPhone, Samsung agreement
for Qualcomm QC2.O and QC3.O
MTKPEI.1/PE2.O
Fast Charge Protocol FCP
Star Fast Charge Protocol AFC
Spreadtrum Fast Charge Agreement SFCP
 
Applications
Solar panel to mobile phone charging
Car charging retrofit
Driving recorder power supply
Home power conversion

Description:
DIY Kits
1 single module can drive the an 8 * 8 dot matrix common cathode
2 the module Operating voltage: 5 v
The Module 3 dimensions: length 3.2 cm X 3.2 cm wide X 1.3 cm high
4 holes with four screws, the diameter of 3 mm
Five modules with input and output interfaces, support for cascading multiple modules
Wiring instructions:
1 on the left block to an input port, the an output port on the right.
2 the When the control of a single module, simple enter the port received a CPU
The When wining 3 modules cascaded output input termination CPU, the input output termination module of the first two modules of the first one, the first two modules of the termination input terminal of the three modules, and so.
The To 51 single example:
VCC 5 v
GND GND
DIN P2.2
CS P2.1
CLK P2.0

Warm prompt:
 
Dear buyer, Our cheapst transportation services Econmic category logistics (SunYou Economic Air Mail , China post Ordinary Small Packet Plus) can be traced only befor it arrive your country , please choose Standard category logistics if you want a full tracking info.
 
For example:
like this

SMD LED - 5050 BLUE
SIZE:5.0*5.0*1.5MM
HUE:455-470NM
REF:3.0-3.6V
CAT:10-20LM
QTY:1000PCS

1, the current sensor chip ACS712ELC-050; ACS712ELC - 20; ACS712ELC - 30;
2, pin 5 v power supply, the onboard power light;
3 30A plus or minus current can be measured, module, the corresponding analog output 100 mv/A;
4, no current through testing, the output voltage is VCC / 2;
5, the size of the PCB board: 31 (mm) x13 (mm);

For Nano IO Expansion Shield is specifically designed to facilitate an easy connection between FOR Arduino Nano and many other devices. In essence, it expands the Nano controller to link those devices in a simple and trouble free manner. It is a perfect companion of Nano breadboard and compatible with both Nano v2.x and v3.x.
This expansion shield provides:
14 I/O Pin (servo type with GND, power and signal)
8 analog Pin with power output and GND
6 PWM Pin
1 Servo power input
5 I2C expansion Pin
AREF output
3.3V output

1, the current sensor chip ACS712ELC-050; ACS712ELC - 20; ACS712ELC - 30;
2, pin 5 v power supply, the onboard power light;
3 30A plus or minus current can be measured, module, the corresponding analog output 100 mv/A;
4, no current through testing, the output voltage is VCC / 2;
5, the size of the PCB board: 31 (mm) x13 (mm);

1, the current sensor chip ACS712ELC-050; ACS712ELC - 20; ACS712ELC - 30;
2, pin 5 v power supply, the onboard power light;
3 30A plus or minus current can be measured, module, the corresponding analog output 100 mv/A;
4, no current through testing, the output voltage is VCC / 2;
5, the size of the PCB board: 31 (mm) x13 (mm);

1, the current sensor chip ACS712ELC-050; ACS712ELC - 20; ACS712ELC - 30;
2, pin 5 v power supply, the onboard power light;
3 30A plus or minus current can be measured, module, the corresponding analog output 100 mv/A;
4, no current through testing, the output voltage is VCC / 2;
5, the size of the PCB board: 31 (mm) x13 (mm);