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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, load short circuit);
4) MOS transistor can control the battery charge and discharge;
 
 
Parameter:
Over charge voltage: 4.25±0.05V
Over charge release voltage:4.23±0.05V
Over discharge voltage:2.54±0.1V
Maximal continuous charging current: 2A
Maximal continuous Discharging current: 2A
Over current protection: 3A
Size: L40*W4*T3mm
Weight: 10g
 
 

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, load short circuit);
4) MOS transistor can control the battery charge and discharge;
 
 
Parameter:
Over charge voltage: 4.25±0.05V
Over charge release voltage:4.23±0.05V
Over discharge voltage:2.54±0.1V
Maximal continuous charging current: 2A
Maximal continuous Discharging current: 2A
Over current protection: 3A
Size: L40*W4*T3mm
Weight: 10g
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

ESP32 is a complete,small form factor(SFF)802.11 b/g/n/e/i(2.4GHz)WLAN plus BT4.2combo solution optimized for low-power,mobile consumer electronics,wearable andInternet of Things(IOT) devices.ESP32 integrates all WLAN and BT functionalityin a single package to support a low cost,layout-friendly implementation whileallowing flexibility for platform specific customization.
   ESP32 is a highly integrated solution withless than 10 external components.
   ESp32 integrates the transmit /receive RFfunctionality including the antenna swiches,RF balun,power amplifier,low noisereceive amplifier,filters,power management,and advanced calibratiom ciacuitriesthat allow the solution to dynamically adjust itself to adapt to externalcircuit implefections.
   The entire solution reduces Printed CircuitBoard (PCB) area,time-to-market,and bill-of-material(BOM)costs while addingcapablities and processing power.the mass production of ESP32 does not requireexpensive and specialized Wi-Fi test equipment.
   ESP32's uitra low power consumption radioarchiteature and proprietary power save technologies extend batter life inreal-world applications,using the following features:
   Fine granularity clock-gating
   Multiple low-power modes,and
   Dynamic voltage scaling
   For instance,in a low-power IoT sensor hubapplication scenario,ESP32 is woken up periodically and only when a specifiedcondition is detected;low duty cycle is used to minimize the amount of energythat the chip expends.The output power of the power amplifier can also beadjusted,so that an optimal trade off between the communication range,data rateand power consumption is achieved.

ESP32 is a complete,small form factor(SFF)802.11 b/g/n/e/i(2.4GHz)WLAN plus BT4.2combo solution optimized for low-power,mobile consumer electronics,wearable andInternet of Things(IOT) devices.ESP32 integrates all WLAN and BT functionalityin a single package to support a low cost,layout-friendly implementation whileallowing flexibility for platform specific customization.
   ESP32 is a highly integrated solution withless than 10 external components.
   ESp32 integrates the transmit /receive RFfunctionality including the antenna swiches,RF balun,power amplifier,low noisereceive amplifier,filters,power management,and advanced calibratiom ciacuitriesthat allow the solution to dynamically adjust itself to adapt to externalcircuit implefections.
   The entire solution reduces Printed CircuitBoard (PCB) area,time-to-market,and bill-of-material(BOM)costs while addingcapablities and processing power.the mass production of ESP32 does not requireexpensive and specialized Wi-Fi test equipment.
   ESP32's uitra low power consumption radioarchiteature and proprietary power save technologies extend batter life inreal-world applications,using the following features:
   Fine granularity clock-gating
   Multiple low-power modes,and
   Dynamic voltage scaling
   For instance,in a low-power IoT sensor hubapplication scenario,ESP32 is woken up periodically and only when a specifiedcondition is detected;low duty cycle is used to minimize the amount of energythat the chip expends.The output power of the power amplifier can also beadjusted,so that an optimal trade off between the communication range,data rateand power consumption is achieved.

Features:
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
Quantity: 1 Set
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
 
 

Features:
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
Quantity: 1 Set
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
 
 

4S 30A 14.8V Li-ion Lithium 18650 Battery BMS Packs PCB Protection Board Balance Integrated Circuits 45x56mm Electronic Board
 
Name:Protection board
Specifications
Over charge detection voltage: 4.28 0.05 V
Over charging voltage: 4.095-4.195V
Over discharge voltage: 2.55±0.08
Over charge detection delay time 0.1s
Temperature range -30-80
Short circuit detection delay time: 100ms
Over current detection delay time: 500 ms
Balanced current: 60mA
Working current: 30A
Over current: 60A
Short circuit protection function: there is, disconnect the load can be self recovery.
Size:45x56mm
Main function:
Over charge protection, over discharge protection function, short circuit protection
function, over current protection function,  balance.
Interface definition:
Charging port of the plate and the discharge port is the same, both positive and B- connecting
battery"-", P- charging port and port on the negative electrode;
B-, N-, P- pads are all over the hole, the hole diameter of the pad is 3.5mm;
The battery charging detection interface with DC output in the form of needle. Do the same mouth
when the N- is not wiring.

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

Description
 
The INA226 is a current shunt and power monitor with an I2C™- or SMBUS-compatible interface. Thedevice monitors both a shunt voltage drop and bussupply voltage. Programmable calibration value,conversion times, and averaging, combined with aninternal multiplier, enable direct readouts of current inamperes and power in watts.
 
 
The INA226 senses current on common-mode bus voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device operates from a single 2.7-V to 5.5-V supply, drawing a typical of 330μA of supply current. The device is specified over the operating temperature range between –40°C and125°C and features up to 16 programmable addresses on the I2C-compatible interface
 
Features
 
Senses Bus Voltages From 0 V to 36 V
• High-Side or Low-Side Sensing
• Reports Current, Voltage, and Power
• High Accuracy:
  – 0.1% Gain Error (Max)
  – 10 μV Offset (Max)
• Configurable Averaging Options
• 16 Programmable Addresses
• Operates from 2.7-V to 5.5-V Power Supply
• 10-Pin, DGS (VSSOP) Package
 
 
Applications
 
• Servers
• Telecom Equipment
• Computing
• Power Management
• Battery Chargers
• Power Supplies
• Test Equipme
 
Pin Description
VBUS: bus voltage input
SDA/SCL: IIC bus data and clock signal lines
ALERT: Multi-function alarm output
A0/A1: IIC address line
IN /IN-: non-inverting analog input, inverting analog input

 
TECH SPECS
Pinout Diagram
 
 
 
Technical parameters:
1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4. 6 PWM port, D3, D5, D6, D9, D10, D11
5. Using  Atmega328P microcontroller
6. Support serial download and ISP download
7. Support external 3.3V ~ 10V dc power supply
8. Support the Li-ion polymer batteries while direct connect Vcc Pin 
9. 16 MHZ clock frequency

 
TECH SPECS
Pinout Diagram
 
 
 
Technical parameters:
1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4. 6 PWM port, D3, D5, D6, D9, D10, D11
5. Using  Atmega328P microcontroller
6. Support serial download and ISP download
7. Support external 3.3V ~ 10V dc power supply
8. Support the Li-ion polymer batteries while direct connect Vcc Pin 
9. 16 MHZ clock frequency

 
TECH SPECS
Pinout Diagram
 
 
 
Technical parameters:
1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4. 6 PWM port, D3, D5, D6, D9, D10, D11
5. Using  Atmega328P microcontroller
6. Support serial download and ISP download
7. Support external 3.3V ~ 10V dc power supply
8. Support the Li-ion polymer batteries while direct connect Vcc Pin 
9. 16 MHZ clock frequency

 
TECH SPECS
Pinout Diagram
 
 
 
Technical parameters:
1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4. 6 PWM port, D3, D5, D6, D9, D10, D11
5. Using  Atmega328P microcontroller
6. Support serial download and ISP download
7. Support external 3.3V ~ 10V dc power supply
8. Support the Li-ion polymer batteries while direct connect Vcc Pin 
9. 16 MHZ clock frequency

 
TECH SPECS
Pinout Diagram
 
 
 
Technical parameters:
1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4. 6 PWM port, D3, D5, D6, D9, D10, D11
5. Using  Atmega328P microcontroller
6. Support serial download and ISP download
7. Support external 3.3V ~ 10V dc power supply
8. Support the Li-ion polymer batteries while direct connect Vcc Pin 
9. 16 MHZ clock frequency

ATTINY85 module Black:
1. Support for the Arduino IDE 1.0 (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.
The Specs:
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.
 
 
ATTINY85 module Blue
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 module Black:
1. Support for the Arduino IDE 1.0 (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.
The Specs:
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.
 
 
ATTINY85 module Blue
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 module Black:
1. Support for the Arduino IDE 1.0 (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.
The Specs:
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.
 
 
ATTINY85 module Blue
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
 

 DC 3V-6V bis 400kV 400000V Boost Step up Power Module High Voltage Generator

76-108MHz DIY Kit FM Radio Transmitter and Receiver Module Frequency Modulation Stereo Receiving PCB Circuit Board
Description:
1. Model: RF-02FM
2. Operating Current: 5-15mA
3. Operating Voltage: DC 3-6V
4. Transmission Distance: 5-50m
5. Transmission Frequency: 88-108MHz
6. Audio Input: -15dB (max)
7. PCB Size: 53*40mm
76-108MHz FM Stereo Radio DIY Kit Wireless FM Receiver Module Frequency Modulation Electronics Soldering Practice Project DC 2.7V-3.3V
Note: Please don't use 18650 battery, if not it will damage the item.
Description:
- The YFM-2 type radio circuit is very simple.
- The total number of components does not exceed 19.
- Although the number of components is not large, it includes two types of components: SMD and DIP which are suitable for novices and friends who want to practice soldering of SMD components.
Features:
1>.Built-in digital automatic gain control (AGC) circuit
2>.Support the global frequency band 76-108Mhz
3>.DIY manual welding
4>.Simple and easy to operate
5>.Support radio memory function
Parameter:
1>.Item name: FM Stereo Radio Module DIY Kit
2>.Item Mode:YFM-2
3>.Work Voltage:DC 3V
4>.Work Current:19mA
5>.Work Frequency:76-108Mhz
6>.Output impedance:32ohm
7>.Work Temperature:-40℃~85℃
8>.Work Humidity:0% ~95% RH
9>.Size(Installed):57*32*20mm
Applicable:
1>.Training welding skills
2>.Student school
3>.DIY production
4>.Project Design
5>.Electronic competition
6>.Graduation design
7>.Crafts collection
8>.Home decoration
9>.Souvenir collection
Installation Tips:
1>.User needs to prepare the welding tool at first.
2>.Please be patient until the installation is complete.
3>.The package is DIY kit.It need finish install by user.
4>.The soldering iron can't touch the components for a long time(1.0 second), otherwise it will damage the components.
5>.Pay attention to the positive and negative of the components.
6>.Strictly prohibit short circuit.
7>.Install complex components preferentially.
8>.Make sure all components are in right direction and right place.
9>.It is strongly recommended to read the installation manual before starting installation!!!
Installation Steps(Please be patient install!!!):
1>.Step 1: Install 1pcs SOP-16 RDA5807PF at U1.There is a dot on one corner of the IC and there is a rectangle pad on PCB where the Pin1 of IC can place on.These two marks are corresponding to each other and are used to specify the installation direction of the IC.
2>.Step 2: Install 1pcs 30K ohm Resistor at R1.
3>.Step 3: Install 1pcs 0.1uH Inductor at L1.
4>.Step 4: Install 2pcs 1uH Inductor at L2,L3.
5>.Step 5: Install 1pcs 32.768KHz Crystal Oscillator at Y1.
6>.Step 6: Install 1pcs 24pF Ceramic Capacitor at C1.
7>.Step 7: Install 1pcs 0.01pF(103) Ceramic Capacitor at C2.
8>.Step 8: Install 1pcs 0.022pF(223) Ceramic Capacitor at C3.
9>.Step 9: Install 5pcs 6*6*5mm Switch at S1-S5.
10>.Step 10: Install 1pcs 100uF 16V Electrolytic Capacitor at C4,C5. Please pay attention to the positive and negative poles. The shorter pin is the negative pole.
11>.Step 11: Install 1pcs 3.5mm Audio Jack at J1.
12>.Step 12: Connect battery box.Pay attention to positive and negative.
13>.Step 13: Use a cable tie to fasten the battery box.
14>.Step 14: Connect to power supply and enjoy the effect.

76-108MHz DIY Kit FM Radio Transmitter and Receiver Module Frequency Modulation Stereo Receiving PCB Circuit Board
Description:
1. Model: RF-02FM
2. Operating Current: 5-15mA
3. Operating Voltage: DC 3-6V
4. Transmission Distance: 5-50m
5. Transmission Frequency: 88-108MHz
6. Audio Input: -15dB (max)
7. PCB Size: 53*40mm
76-108MHz FM Stereo Radio DIY Kit Wireless FM Receiver Module Frequency Modulation Electronics Soldering Practice Project DC 2.7V-3.3V
Note: Please don't use 18650 battery, if not it will damage the item.
Description:
- The YFM-2 type radio circuit is very simple.
- The total number of components does not exceed 19.
- Although the number of components is not large, it includes two types of components: SMD and DIP which are suitable for novices and friends who want to practice soldering of SMD components.
Features:
1>.Built-in digital automatic gain control (AGC) circuit
2>.Support the global frequency band 76-108Mhz
3>.DIY manual welding
4>.Simple and easy to operate
5>.Support radio memory function
Parameter:
1>.Item name: FM Stereo Radio Module DIY Kit
2>.Item Mode:YFM-2
3>.Work Voltage:DC 3V
4>.Work Current:19mA
5>.Work Frequency:76-108Mhz
6>.Output impedance:32ohm
7>.Work Temperature:-40℃~85℃
8>.Work Humidity:0% ~95% RH
9>.Size(Installed):57*32*20mm
Applicable:
1>.Training welding skills
2>.Student school
3>.DIY production
4>.Project Design
5>.Electronic competition
6>.Graduation design
7>.Crafts collection
8>.Home decoration
9>.Souvenir collection
Installation Tips:
1>.User needs to prepare the welding tool at first.
2>.Please be patient until the installation is complete.
3>.The package is DIY kit.It need finish install by user.
4>.The soldering iron can't touch the components for a long time(1.0 second), otherwise it will damage the components.
5>.Pay attention to the positive and negative of the components.
6>.Strictly prohibit short circuit.
7>.Install complex components preferentially.
8>.Make sure all components are in right direction and right place.
9>.It is strongly recommended to read the installation manual before starting installation!!!
Installation Steps(Please be patient install!!!):
1>.Step 1: Install 1pcs SOP-16 RDA5807PF at U1.There is a dot on one corner of the IC and there is a rectangle pad on PCB where the Pin1 of IC can place on.These two marks are corresponding to each other and are used to specify the installation direction of the IC.
2>.Step 2: Install 1pcs 30K ohm Resistor at R1.
3>.Step 3: Install 1pcs 0.1uH Inductor at L1.
4>.Step 4: Install 2pcs 1uH Inductor at L2,L3.
5>.Step 5: Install 1pcs 32.768KHz Crystal Oscillator at Y1.
6>.Step 6: Install 1pcs 24pF Ceramic Capacitor at C1.
7>.Step 7: Install 1pcs 0.01pF(103) Ceramic Capacitor at C2.
8>.Step 8: Install 1pcs 0.022pF(223) Ceramic Capacitor at C3.
9>.Step 9: Install 5pcs 6*6*5mm Switch at S1-S5.
10>.Step 10: Install 1pcs 100uF 16V Electrolytic Capacitor at C4,C5. Please pay attention to the positive and negative poles. The shorter pin is the negative pole.
11>.Step 11: Install 1pcs 3.5mm Audio Jack at J1.
12>.Step 12: Connect battery box.Pay attention to positive and negative.
13>.Step 13: Use a cable tie to fasten the battery box.
14>.Step 14: Connect to power supply and enjoy the effect.

Features :
100% Brand New
Voltage: DC 6-36V
Output current: 300mA
3 Wire
Polarity: NPN
Dimention: M12x10x55mm
Detection Distance: 4 mm
Ouput Status: Normally Open
Part number: LJ12A3-4-Z/BX
Detection objects: Conductor

 Features:
 
    100% Brand New.
    Size: 48mm x 29mm x 21mm.
    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: 10A (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 Content:
    1 x DC 0-100V Voltmeter Ammeter
 

4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery)
 
Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)
 
Product Size: 45 * 55 * 3.4mm (Standard Edition / Enhanced), 46 * 60 * 3.4mm (balanced version)
 
Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version)
 
Charging voltage: 16.8V - 18.1V
 
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
 
Continuous charge current (upper limit): 20A
 
Equalization version: suitable for starting current below 80A, power 135W below the drill.

Features:
100% brand new and high quality
Ding dong doorbell switch s1 is push button switch on the door, without press the switch, the capacitance cannot be connected is not recharged, and capacitance voltage of 0 v, the reset has been in a low level condition, leading to the speaker doesn't work.When closed switch s1, the VCC current through the diode for capacitor charging, make its both ends of the voltage, and reset voltage also began to rise gradually.When the voltage of the capacitance increased to higher levels, namely the reset input port is the high level, the timer starts, composed of resistance, capacitance and diode oscillator start work, output frequency for f1.When disconnecting switch s1, resistance and capacitance circuit, capacitor began to discharge.At the same time composed of resistance, capacitance and diode oscillator start work, output frequency for ' 2 f.Restore low level is reset when the capacitor discharge end, timer stop working.
In the speaker output termination, output current will make the speaker voice.Output frequency is not at the same time, the sound is different.This circuit has two kinds of different frequency, so the speaker will be issued a "ding" "dong" two kinds of different sounds.
Specifications:
Package Name: NE555 doorbell kit
Working voltage: 4.0-7.0V
PCB size: 28mm (L) *25mm (W)
Kit horn: 8 Ohm 0.25W
Color: Beige
Net Weight: 15g
Package Includes:
1* 8 Ohm 0.25W horn
2* 100MM red line
2* 100MM black line
1* NE555 chip
1* 8P IC block
1* 100UF 25V Capacitance
1* 10UF 25V Capacitance
1* 6*6*5 keystroke]
3* 103 ceramic capacitors
5* 47K resistance
2* 1N4148

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

 
 
 
 
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-36V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 

NANO-Blue（Atmega328）
 
 

NANO-Blue（Atmega328）
 
 

NANO-Blue（Atmega328）
 
 

NANO-Blue（Atmega328）
 
 

NANO-Blue（Atmega328）