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1.Module Feature: Non-isolation booster
2.Ectifier system:Not synchronous rectifier
3.Input voltage:4.3V-32V
4.Output voltage: 5V-52V
5.Incoming current:4A(maximum)
6.Transfer efficiency:94% (The highest)Normal efficiency for85%
7.Switching frequency:400KHz
8.Output ripple:50mV
9.Load regulation:±0.5%
10.Voltage regulation:±0.5%
11.operating temperature:-40°~ 85°
12.Size:6.98cm*3.80cm
 
Function key:
 
1).Short press: input/output display options
2).Moderate press: Enter the fine-tuning state .Increase or decrease the offset (the default is 0), when the voltage display inaccurate use .Short according to the regulation, long press or long according to restore
3).Long press: the state of low power consumption, the digital tube and the lights are out, the normal work of the module. Click the button again to restore. Normal display
Clockwise to adjust output voltage:
Clockwise----- increasing voltage
Counterclockwise----reduce the voltage

TMBB
Module wholesale, professional distribution of electronic components. Our products are wholesale prices, priority is given to large quantities. Products are of higher quality than the market and can be purchased with confidence.
Product description
Product introduction: The motor drive module is very suitable for use on battery-powered smart cars, toy cars, robots, etc. The power supply voltage is 2V ~ 10V, which can drive two DC motors or a 4-wire 2-phase stepper motor at the same time. The function of forward and reverse and speed regulation, each current can reach 1.5A continuous current, the peak current can reach 2.5A, has thermal protection and can automatically recover.   Product Highlights: 1. Imported original professional motor driver chip, built-in low-conductance internal resistance MOS switch tube, with minimal heat generation, no heat sink, small size, power saving, ideal for your battery power supply. (L298N is a transistor switch, which has low efficiency, high heat generation, heat dissipation, bulky volume, and the L298N on the market is extremely easy to burn out. None of the original chips are used. This product can be a perfect replacement. 2. Dual 1.5A * 2, peak current can reach 2.5A, built-in overheating protection circuit, don't be afraid of motor stalling and burning, it will recover automatically when temperature drops. (The voltage and current of smart cars on the market are within this range)   3. Small size, light weight, 0 standby current, ideal for your model car Product parameters: Dual H-bridge motor drive, can drive two DC motors or a 4-wire two-phase stepper motor at the same time; Module power supply voltage 2V-10V; Signal terminal input voltage 1.8-7V; Single-channel working current 1.5A, peak current up to 2.5A, low standby current (less than 0.1uA); Built-in anti-common state conduction circuit, when the input terminal is floating, the motor will not malfunction. Built-in overheat protection circuit (TSD) with hysteresis effect, no need to worry about motor stalling; Product size: 24.7 * 21 * 5mm (length, width, height), ultra-small size, suitable for assembly and vehicle; Mounting hole diameter: 2 mm. Weight: 5g   data: INx is connected to the microcontroller IO or other signal source, and MOTOR-A and MOTOR-B are connected to the motor. DC motor drive logic truth table: Precautions: 1. The positive and negative poles of the power supply are reversed, which will definitely cause circuit damage.   2. The output is short-circuited to ground or the output terminal is short-circuited, and the motor is blocked, the chip will be thermally protected, but the chip will be burned when the voltage is close to or exceeds 10V and the peak current greatly exceeds 2.5A.
 

product information
Product name: Battery charge and discharge module
Product model: XR-M608
Input voltage: DC6-40V
Voltage error: 0.1V
Scope of application: 6-40V various batteries
Output type: relay output
Product size: 66 * 46 * 16MM
Product weight: 35 grams
Opening size: 3.3MM

Features: 
100% brand new and high quality 
Quality can be greatly ensured.
Professional Speed controller.
20A ESC Brushed Speed Controller For RC Car And Boat
It's Brushed bustophedon ESC.(forward,reverse) 
Specifications: 
Current(A):10A/20A/30A
BEC 5V 1A 
PWM: 8K 
Input signal : PPM 
Driver frequency:2KHz 
Li-Po: 2S 
Ni-Mh/Ni-cd: 4-7cell  4.8V--8.4V
Constant current 20A Max 15A< 30s Pulsed 30A< 5s 
For 1/16 1/18 1/24 car and boat 
Size: 89mm x 75mm x 7mm 

Technical Parameters:
1.  Supply voltage: 1.5V-3.6V
2.  Humidity measuring range: 0-100% RH
3.  Temperature range: -40°C-105°C
4.  Maximum power consumption: 2.7uW
5.  Humidity accuracy range: 10% RH to 95% RH
7.  Humidity Hysteresis: ±1% RH
8.  Measurement time: 50ms
9.  The annual shift: -0.5% RH / year
10. Response time: 5s
11. Communication: I2C
Accuracy:
12.HTU20D T: /-0.3 °C
13. RH: /- 4% RH
14. HTU21D T: /-0.3 °C
15. RH: /- 2% RH
16. Storage temperature: -40 °C ~ 125 °C
17. Working humidity range: 0-100% RH
18. Working temperature range: -40 °C~ 105 °C
Packing List:
SHT20 Module*1PCS 
 

Support Dropshipping and Wholesaling.
100% Original and Good Quality with Free After-sale Warranty.
1. Energy-saving and noise-reduction of fans for outdoor chassis and cabinets
2. Energy saving and noise reduction of the fan in the computer room
3. Other fan temperature control and speed regulation applications
specification:
Working voltage: Suggestion: DC12V (working within 9-14V range)
Input reverse connection protection: Yes
Output overload protection: none (do not short circuit or overload!!!)
Power interface: XH-3P terminal block (pin spacing 2.54mm)
Fan current: within 0.8A (not overloaded)
specification:Fan interface: KF2510-3P terminal block (pin spacing 2.54mm)
Temperature probe parameters: NTC 50kB=3950 length 50CM
Temperature probe interface: XH-2P terminal block (pin spacing 2.54mm)
Temperature probe temperature resistance: ring probe 110℃
Suitable for industrial control environment.
Colour: black
Material: ABS
Size: 48.95 x 17.92mm
Package Contents:
1 x module
1 x 20cm power cord
1 x 50cm thermal sensor line
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is /- 1-3cm.

This high-voltage module is made using the principle of the Tesla coil. It outputs high-voltage pulsed high-voltage current. It is small in size, high in efficiency, and simple in the peripheral circuit (just connect the switch and the battery).
Input voltage: DC 3V-6V
Input current: 2A-5A
High voltage type: pulse current type
Output voltage: about 200,000 volts (please pay attention to safety when using)
High voltage two-pole discharge distance: 10mm-20mm
Length of output high voltage line: about 100mm
Input power cord length: about 100mm (the red wire is positive)
Dimensions: Φ24*64mm
Regarding the power supply: You can use a single 3.7V lithium battery or two in series, such as 18650 batteries, idle mobile phone batteries (with the protection board removed, the recommended capacity is more than 2000mAh) or Ni-Cd/Ni-MH battery pack, 4V or 6V lead-acid Battery, etc.
This module is a finished module of high-voltage inverter transformer/booster for scientific small production. After inputting DC3V-7.2V voltage at the input end, it can get about 200,000 volts DC high voltage at the output end (about 1-2 cm arc) , Note that there is no ignition function
 
 
 
Wiring: The red wire is the positive pole of the power supply. The output is 2 high temperature and high pressure resistant silicone wires

ATTINY85  Black：The Specs:
Support for the IDE 1.0 (OSX/Win/Linux)
Power via USB or External Source - 5v or 7-35v (automatic selection)
On-board 500ma 5V Regulator
Built-in USB (and serial debugging)
6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
8k Flash Memory (about 6k after bootloader)
I2C and SPI (vis USI)
PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins
Power LED and Test/Status LED (on Pin0)
ATTINY85 blue：
Product Description:
1. Support for the Arduino IDE 1.0 (OSX/Win/Linux).
2. Power via USB or External Source - 5v or 7-16v (automatic selection).
3. On-board 150ma 5V Regulator.
4. Built-in USB (and serial debugging).
5. 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8k Flash Memory (about 6k after bootloader).
7. I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. ADC on 4 pins.
10. Power LED and Test/Status LED

ATTINY85  Black：The Specs:
Support for the IDE 1.0 (OSX/Win/Linux)
Power via USB or External Source - 5v or 7-35v (automatic selection)
On-board 500ma 5V Regulator
Built-in USB (and serial debugging)
6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
8k Flash Memory (about 6k after bootloader)
I2C and SPI (vis USI)
PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins
Power LED and Test/Status LED (on Pin0)
ATTINY85 blue：
Product Description:
1. Support for the Arduino IDE 1.0 (OSX/Win/Linux).
2. Power via USB or External Source - 5v or 7-16v (automatic selection).
3. On-board 150ma 5V Regulator.
4. Built-in USB (and serial debugging).
5. 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8k Flash Memory (about 6k after bootloader).
7. I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. ADC on 4 pins.
10. Power LED and Test/Status LED

Description:
     
Type:Mosfet 
Size:60x50mm
Maximum current:25A
Compatible with 12 and 24 VDC systems
Supports 50-80 Amps without active cooling
Supports up to 210 Amps with active cooling
M3 hardware compatible mounting holes (3.2mm diameter)
Supports PID control 
 
Package include:
1 *  3D Printer Accessories Mosfet Heated Bed Power Module
 

LM2596S LED Voltmeter ADJ DC - DC Step-down Step Down Adjustable Power Supply Module With Digital Display
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: 66mm * 36mm* 14mm(l x w x h)
Colours:Blue        Package Weight: :23g/pcs
Materials: FR4 electronic components
Name: LM2596ADJ DC - DC Step-down power Module ( Step Down Adjustable With Digital Display S
With a voltage meter and voltmeter displays self-calibration. Uses a more advanced microprocessor voltage voltmeter error ± 0.05V, Range 0 ~ 40V. (To ensure accuracy voltmeter, make sure the input voltage of 4.5V and above)
· Touch of a button to switch the input or output voltage measurements and has a light show which is being measured voltages, and save the settings, even the power off and then on.
· Input Voltage 4.5~ 40V. (Input voltage must be higher than the output voltage of 1.5v or more)
· Adjustable output voltage range of 1.25V ~ 37V continuously adjustable. (Input voltage must be higher than the output voltage of 1.5V)
· Output current 3A, recommendations within 2.0A use, high current needed to enhance heat dissipation.
· Output power 20W, 15W, please enhance heat dissipation over.
· High conversion efficiency, on average 88% (efficiency and the input and output voltage, current, pressure related)
· With reverse polarity protection, reverse polarity does not burn
 
 Usage: 
 
· Onboard voltage table shows the output voltage, long press on the right button for 2 seconds after the release, voltmeter and the output voltage indicator "OUT" synchronous flashing, this time into an output voltage adjustment mode; Similarly, the voltmeter shows when the input voltage, long press the Right button 2 seconds after the release, voltmeter and an input voltage indicator "IN" synchronous flashing, then enter the adjustment mode input voltage;
· Touch the right side of the button, the voltage increases one unit, touch the left button, voltage reduction unit; because the voltage is less than the value of a unit of 0.1V, so you need to press the 1-5 times in a row to see the voltmeter change of 0.1V, concrete continuous button several times depending on the voltage value currently displayed, the current display higher the voltage, the fewer the number of presses;
· When the voltage is adjusted, long press on the right button for 2 seconds after the release, then you can exit the voltage calibration mode, all parameters set to automatically power down to save.
· Note: this way you only need to adjust the calibration once to get precise voltage values over the entire voltage range, this feature is designed to meet your requirements and design a higher accuracy, ease of use.
Note:
 
 1.When the module output voltage can not be adjusted, the output  voltage is always equal to the input voltage.Please adjust the potentiometer counterclockwise 20 laps or more. (Let potentiometer against your chest, counterclockwise turn boost) .
2. Input voltage must be higher than the output voltage of 1.5v or more
3. high current or high power needed to enhance heat dissipation
creen)

BBS:http://mh.nodebb.com Product introduction: The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog to digital converter, anti-aliasing filter, power management and industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the need for an audio codec for use in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound. Product Features: 1. Digital I2S interface with high precision 24-bit data 2. High signal to noise ratio is 61 dBA 3. High sensitivity - 26 dBFS 4. Stable frequency response from 60 Hz to 15 kHz 5. Low power consumption: low current consumption 1.4 mA 6. High PSR: -75 dBFS Interface definition: SCK: Serial data clock for I2S interface WS: Serial data word selection for I2S interface L/R: Left/Right channel selection. When set to low, the microphone outputs a signal on the left channel of the I2S frame. When set to high level, the microphone outputs signals on the right channel SD: Serial data output of the I2S interface. VCC: Input power, 1.8V to 3.3V. GND: power ground This product provides tutorials for using ESP32 modules with I2S functionality. Connect to ESP32: INMP441 ESP32 SCK >> GPIO14 SD >> GPIO32 WS >> GPIO15 L/R >> GND GND >> GND VDD >> VDD3.3 What is the difference between an omnidirectional microphone and a unidirectional microphone: First of all, I understand that the sound divergence is all-round. One person speaks and diverge in the air. As for how far it can pass, it depends on many factors. 1.directional microphone, the general pickup radius is very small, 30 cm is a big one, single use, put it on the mouth, the sound quality is very good, because it is not picked up again. The shape is generally goose neck wheat, a rod, a curved rod, to your mouth, directivity, just listen to your voice. With a single-point microphone, the sensitivity is limited to a certain range. Sensitivity is too high, causing sharp whistling, etc., involving many other devices As for why not make a big pickup radius, there is a reason. Later 2.omnidirectional microphone, the general pickup radius is very large, one meter two meters three meters five meters have, compared with ten centimeters, this level is very different, it is not just picking a person's voice, but Multiple people, five six, seven eight or even ten. Omnidirectional microphones are highly sensitive, The omnidirectional microphone pickup radius is too large, and it will also pick up more ambient noise, so the sound quality is not as good as the single-point microphone, unless you do a good noise reduction. There is definitely a difference between collective use and single-person service. But omnidirectional wheat has a benefit, the wiring is simple, not one by one. Suitable for small meetings, ad hoc meetings, some remote discussions, remote operations. 3.single-point wheat generally supports local amplification, Omnidirectional microphones generally do not support local amplification. It should be noted that because of such high sensitivity, the local amplification whistling is very scary, and the current technology is difficult to deal with.

DC 8-32V to DC 45V-390V
Description: High Voltage Boost Module Module Properties: Non-isolated step-up module Input Voltage: 8~32V input(the default is 10~32V input.) Input Current: 5A (Max) Quiescent current: 15mA (12V liter 50V, the output voltage, the higher the current will increase too quiet) Output Voltage: 45~390V continuously adjustable (default output ±50V) Output Current: 0.2A Max(with input, output pressure related,the higher the output voltage, output current is smaller) Output Power: 40W (Peak 70W) Working Temperature: -40 ~ 85 degrees (ambient temperature is too high, please enhance heat dissipation) Operating frequency: 75 KHz Conversion efficiency: up to 88% (efficiency and input and output voltage, current, pressure-related) Short circuit protection: Yes. Over current protection: Yes. (Input current exceeds 4.5A, reducing the output voltage) Over voltage protection: Yes. (Output voltage exceeds 410V, lowering the output voltage) Input reverse polarity protection: Yes (non-self-healing, reverse burning fuse, try not reversed.) Installation: Four 3 mm screws Wiring: free welding output terminals Size(L*W*H):60 x 50 x 20 mm Applications: 1.Pressure test power. 2.Hunting,eradication of mice. 3.Capacitor charging,electromagnetic guns power supply. 4.The power supply for your electronic device, according to your system can set the output voltage value. Package Included: 1 x Booster Module Note: Manual measuring, please allow 1 ~ 5 mm error,thank you.

Name: Adjustable Linear Regulator
  Output Current: 1.5A (minimum), 2.2A (typ)
  Input and output voltage difference (VI-VO): 40Vdc (max)
  Adjustable output voltage range: 1.2 ~ 37V
  Operating temperature: -55 to 150
  Output Current: 1.5A
  Input voltage: 4.2 ~ 40 V
  Characteristics Frequency: 100 (MHz)
  Module size: 35.6 (mm) x16.8 (mm)
  Input: VIN positive input stage, GND negative input
  Output: VOUT output positive level, GND output negative
  Maximum output current: maximum output current = 3 / (Input voltage - output voltage)
 
Applications
Mobile phone, MP3, MP4, PSP and many other charging equipment

Feature:
-100% brand new and high quality
-Qi wireless charger PCBA circuit board,allows to charge for any Qi-enabled device.
-Better for DIY, you can give it a case (not too thick) or fix it on your furniture or other devices, but please note the transfer efficient distance is only 2-8mm.
-High power, quick-acting charging.
-Over 75% high-efficient energy conversion.
-Ultrathin,lightweight,safe and reliable.
Specification:
-Wireless charging standard: Qi standard
-Input voltage:DC5V
-Input current:2A
-Charging voltage:5V
-Charging power:5W
-Conversion:≥75%
Suitable for:
-Following phones with built-in charging receiver, can be charged directly.
Package Content:1X Qi Wireless Charger PCBA Circuit Board

Features
High-Performance 10/100 Ethernet Physical Layer Transceiver (PHY)
Supports single 3.3V supply
Supports the reduced pin count RMII interface
Supports HP Auto-MDIX
Onboard chip package: 24-pin QFN (4x4 mm) Lead-Free RoHS Compliant package
Flexible Power Management Architecture
Integrated 1.2V regulator
I/O voltage range: 1.6V to 3.6V
Applications
Embedded web server

A, Product introduction
The expansion board can be used as a carving machine,3DPrinter driver expansion board, a total ofFourThe slot of the drive module of the stepper motor.Note that Moto Sako does not containA4988Stepper motor drive module, need to be in the shop to buyCan be drivenFourThe road does not enter the motor, and each step motor is only requiredTwoindividualIOMouth, that is to say,SixindividualIOMouth can be a very good managementThreeStepper motor, the use of very convenient, farewell to the traditional stepper motor cumbersome.
Two, UNOAnd moduleIOIntroduction to the correspondence of the mouth
 
Stepper motor basic control needs of the pin, the other pin is in the engraving machine, or3DThe printer when it is used, here we do not make detailed,IOCorresponding as above.
  UNO----------------------Expansion board
    8 ------------------------ (ENStepper motor driver to enable the end, the low level effective)
7 and Z.DIR (ZAxis direction control)
6 and Y.DIR (YAxis direction control)
5 and X.DIR (XAxis direction control)
4 conducting Z.STEP (ZAxis step control)
3 conducting Y.STEP (YAxis step control)
2 conducting X.STEP (XAxis step control)
/ /The following is a simple stepper motor control procedures,
#define EN 8 / /Stepping motor to the end, the low level effective
#define X_DIR 5 //Xaxis Stepper motor direction control
#define Y_DIR 6 //yaxis Stepper motor direction control
#define Z_DIR 7 //zaxis Stepper motor direction control
#define X_STP 2 //xaxis Step control
#define Y_STP 3 //yaxis Step control
#define Z_STP 4 //zaxis Step control
*
/ /Function:StepFunction: control the direction of the stepper motor, step by step.
/ /Parameters:DirDirection controlDirPin,Corresponding to the stepper motorDIRPin,StepperPinCorresponding to the stepper motorStepPin,StepsNumber of steps
/ /No return value
* /
Void step (Boolean dir byte dirPin,, byte stepperPin int steps,)
{
(digitalWrite dirPin, dir);
Delay (50);
For (int i = 0; I < steps; i ) {
DigitalWrite (stepperPin, HIGH);
DelayMicroseconds (800);
DigitalWrite (stepperPin, LOW);
DelayMicroseconds (800);
}
}
Void (setup) {//Will be used in the stepper motorIOPin is set to output
(pinMode X_DIR, OUTPUT); pinMode (X_STP, OUTPUT);
(pinMode Y_DIR, OUTPUT); pinMode (Y_STP, OUTPUT);
(pinMode Z_DIR, OUTPUT); pinMode (Z_STP, OUTPUT);
(pinMode EN, OUTPUT);
(digitalWrite EN, LOW);
}
Void (loop) {
(step false, X_DIR, X_STP, 200); //XShaft motor reversalOneRing,Two hundredStep for a circle
(step false, Y_DIR, Y_STP, 200); //yShaft motor reversalOneRing,Two hundredStep for a circle
(step false, Z_DIR, Z_STP, 200); //zShaft motor reversalOneRing,Two hundredStep for a circle
Delay (1000);
(step true, X_DIR, X_STP, 200); //XShaft motor ForwardOneRing,Two hundredStep for a circle
(step true, Y_DIR, Y_STP, 200); //yShaft motor ForwardOneRing,Two hundredStep for a circle
(step true, Z_DIR, Z_STP, 200); //zShaft motor ForwardOneRing,Two hundredStep for a circle
Delay (1000);
}
 
Experimental phenomena: a turn of the stepper motor, pauseOneSecond, then a story circle, so the cycle.
It is worth noting that in theA4988When the module is not plugged in, step motor connection mode is:
2A, 2BFor a group (red, green),1A, 1BFor a group (blue, yellow) would like to change direction, change the location of one group can be, for example2A,and2BExchange.
Description Product
CNC Shield Board:
Latest CNC Shield Version 3
0.9 compatible. GRBL (open source firmware that runs on an uno that turns the G-code commands into stepper 37signals)
PWM Spindle and direction pins
4-Axis support (X, Y, Z, A-Can duplicate X, Y Z, or do a full 4th axis with custom firmware using pins D12 and D13)
2 x End stops for each axis (6 in total)
Coolant enable
Uses removable A4988 or DRV8825 compatible stepper drivers
Jumpers to set the Micro-Stepping for the stepper. (some drivers like the DRV8825 can do up to 1 / 32 micro-stepping)
Compact design.
Stepper Motors can be connected with pin Molex connectors or soldered 4 in place.
Runs on 12-36v DC. (at the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the.)
Package includes:
Shield Board 1xCNC

Auto start voltage will be pulled down to 7V less or smaller engine at high speed when the voltage up to 15V or higher. For 12V electrical work hard at work, this automatic buck module solves this problem , regardless of the input voltage is 5V or 12V or 32V, the output can be stabilized at 12V.
Wide input voltage 5V - 32V;
Wide Output Voltage 1.25V - 35V ( with automatic buck , scope of work, any voltage inputs can be arbitrarily regulated voltage output ) ;
Built- 4Aefficient MOSFET switches enable efficiency up to 94% ; (LM2577 current is 3A)
high switching frequency of 400KHz, the ripple is smaller and smaller . (LM2577 frequency only 50KHz)
Application:
Car regulator , solar photovoltaic, wind power and other applications of voltage instability .
Technical parameters
Model Specification:DSN6000AUD Automatic Buck module
Module Properties:Non- isolated boost (BOOST)
Rectification:Non- Synchronous Rectification
Input Range:3.8V - 32V
Output Range:1.25V - 35V
Input Current:3A ( max ) , no-load 18mA (5V input , 8V output , no-load is less than 18mA. Higher the voltage , the greater the load current . )
Conversion efficiency:<94% ( greater the pressure , the lower the efficiency )
Switching frequency:400KHz
Output Ripple:50mV ( the higher the voltage , the greater the current , the greater the ripple )
Load Regulation:± 0.5%
Voltage Regulation:± 0.5%
Operating Temperature:-40  - 85
Dimensions:48mm * 25mm * 14mm ( L * W * H )

2 strings lithium battery boost charging board description
The 2-series lithium battery boost charging board is a dual-series lithium battery synchronous boost charging module with high integration and high reliability. The input voltage is 5V, the BAT voltage is 8.4V, and the charging efficiency is 94% when the charging current is 1.2A. . The charging integrates various protection functions: input overvoltage, input undervoltage, output overvoltage, output short circuit, chip overtemperature, and a maximum charging time of 24 hours.
Parameter function description
1. Input voltage working range 4.6V~5.5V
2.5V/2A input synchronous boost charging
3. Enter adaptive charging
4. Support two 4.2V batteries
5.ED display charging status, support two-color light display
6. Built-in trickle/constant current/constant voltage charging mode
7. Charge 24 hours overtime protection
8. Output overcurrent, overvoltage, short circuit protection
9. Input overvoltage and undervoltage protection
10. Input withstand voltage 13V
11.OTP over temperature protection
12. Size: 28MM*17MM

Module name : dual H bridge motor drive module
Work mode : H bridge drive (double road)
Main control chip : L298N
Packaging : electrostatic bag
Logical voltage : 5V
Drive voltage : 5v-35v
Logical current : 0mA-36mA
Driving current : 2A(MAX single bridge)
Storage temperature : - 20 ℃ to 135 ℃
Maximum power : 25W
Weight : 30 g
Peripheral dimensions : 43*43*27mm
 
Product features:
This module USES L298N as the main drive chip, with strong driving ability, low heat and strong anti-interference ability.
 
Through this module can use the built-in 78 m05 drive power supply parts of their work, but in order to avoid the voltage regulator chip damage, when using the driving voltage is greater than 12 v, please use the external power supply 5 v logic.
 
This module USES a large capacity filter capacitance, a continuation protection diode, can improve reliability.
 
 
Notes:
1. When you are driving voltage (above logo for the 12 v input, can actually accept input range is 7 to 12 v) for 7 v to 12 v, can make to onboard power supply 5 v logic, when using the onboard after 5 v power supply, interface of 5 v
The power supply does not input voltage, but can yield 5V voltage for external use.
 
2. When the driving voltage is higher than 12V, it is less than or equal to 24V
(the chip manual proposes to support 35V, but according to the book
When the maximum voltage is applied to the maximum voltage of 298 conservative applications to 24V, for example, the motor with a rated voltage of 18V shall be driven.
You must first remove the board 5V output to enable the jumper cap. Then 5V is accessed outside the 5V output port
The 5V enables the power to be a control signal with a level of 5V. When the signal input is valid, and when the power supply is normal in the motor drive module, the motor drive module outputs the current. Otherwise, even if the power supply is normal, there is no current on the motor.
Voltage to L298N internal logic circuit power supply. (this is a high-pressure, unconventional app!)
 
 
 
Module name : dual H bridge motor drive module
Work mode : H bridge drive (double road)
Main control chip : L298N
Packaging : electrostatic bag
Logical voltage : 5V
Drive voltage : 5v-35v
Logical current : 0mA-36mA
Driving current : 2A(MAX single bridge)
Storage temperature : - 20 ℃ to 135 ℃
Maximum power : 25W
Weight : 30 g
Peripheral dimensions : 43*43*27mm
 
Product features:
This module USES L298N as the main drive chip, with strong driving ability, low heat and strong anti-interference ability.
 
Through this module can use the built-in 78 m05 drive power supply parts of their work, but in order to avoid the voltage regulator chip damage, when using the driving voltage is greater than 12 v, please use the external power supply 5 v logic.
 
This module USES a large capacity filter capacitance, a continuation protection diode, can improve reliability.
 
 
Notes:
1. When you are driving voltage (above logo for the 12 v input, can actually accept input range is 7 to 12 v) for 7 v to 12 v, can make to onboard power supply 5 v logic, when using the onboard after 5 v power supply, interface of 5 v
The power supply does not input voltage, but can yield 5V voltage for external use.
 
2. When the driving voltage is higher than 12V, it is less than or equal to 24V
(the chip manual proposes to support 35V, but according to the book
When the maximum voltage is applied to the maximum voltage of 298 conservative applications to 24V, for example, the motor with a rated voltage of 18V shall be driven.
You must first remove the board 5V output to enable the jumper cap. Then 5V is accessed outside the 5V output port
The 5V enables the power to be a control signal with a level of 5V. When the signal input is valid, and when the power supply is normal in the motor drive module, the motor drive module outputs the current. Otherwise, even if the power supply is normal, there is no current on the motor.
Voltage to L298N internal logic circuit power supply. (this is a high-pressure, unconventional app!)

Usejrc2150BBEaudio processing chip
Modular circuit design, ready to use when power is on, with power supply regulator chip
WithBBEthrough switch (OFF-close, ON-open)
Pcb size: 50MM*33MM
Working voltage: DC5V-24V

Usejrc2150BBEaudio processing chip
Modular circuit design, ready to use when power is on, with power supply regulator chip
WithBBEthrough switch (OFF-close, ON-open)
Pcb size: 50MM*33MM
Working voltage: DC5V-24V

GY-291 ADXL345 Digital Three 3 Triple Axis Sensor Acceleration Of Gravity Tilt Board For Arduino Module IIC SPI Replace ADXL335
Description:
ADXL345 is a small, thin, low-power three-axis accelerometer can be high Up to ± 16 g accelerometer with high resolution (13) measurements. Digital Outputs According to a 16-bit twos complement format, can be accessed through the digital interface SPI (3-wire or 4-wire) or I2C.
ADXL345 is well suited for mobile device applications. It can tilt sensing applications Measuring the static acceleration of gravity, it can also measure the dynamic add motion or shock caused speed. Its high resolution (4 mg / LSB), capable of measuring about 0.25 ° of inclination Angle change. Use ADXL345 digital output acceleration timing, etc., without the need for Analog to digital conversion, reducing system cost and board space. In addition, ADXL345 is a small, thin, ultra-low power 3-axis accelerometer with high resolution (13-bit) measurement at up to ± 16g. Digital output data is 16-bit twos complement format, can be accessed via I2C digital interface SPI (3-wire or 4-wire) or.
ADXL345 is well suited for mobile device applications. It can tilt sensing applications Measures the static acceleration of gravity, you can measure motion or shock resulting from moving State acceleration. Its high resolution (3.9mg / LSB), capable of measuring less than 1.0 ° Tilt angle change.
The device offers a variety of special detection. Activity and inactivity sensing through Comparing any axis acceleration threshold set by the user to detect the presence or absence of transport Movable occurs. Tap any direction sensing detects single and dual vibration vibration Make. Free-fall detection can detect whether the device is falling. These ones Functions can be mapped to two interrupt output pins a. Shen is Please patented integrated memory management system uses a 32 FIFO (FIFO) buffer can be used to store data, which will host processor load Minimize, and lower overall system power consumption.Low power modes enable intelligent motion-based power management to a very lowPower consumption threshold sensing and active acceleration measurement.
Feature:
Power supply: 3-5v
Communication: IIC / SPI communication protocol
Measuring range: ± 2g ± 16g

2000W SCR Electronic Voltage Regulator Speed Controller Dimmer Thermostat
Features:
1. Special design with 1.6 thick FR - 4 high temperature resistant circuit board.
2. It is safety and reliable to cope with large current.
3. Double capacity design: Safety capacitor and Metal film capacitor to protect SCR more effective. More efficiency and more safety.
4. 1.5 thick aluminum and stainless steel case, more suitable for family temperature control or speed control and industrial enterprises to use.
5. Beautiful and easy, safe, convenient, high quality products. It will not rust after long time using.
6. Mainly fit for the resistive loads, eg. lights.
Specifications:
Voltage range:10V-220V
maximum power: 2000W
Net Weight: 41.8g
Working voltage: AC 220V
radiator fin size: 48 x 35 x 30mm