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4-level LED lamp display power, not working state intelligent automatic shutdown;

The built-in lithium battery protection IC, over-current, overpressure, under-voltage protection;

Dual USB output ports.

Input requirements: 5V constant voltage power supply can do charge input power, the most matching charger for 5V 1A above

Compatible Batteries: 18650 batteries, cell phone batteries, flat-panel batteries, MP3 batteries, etc. 3.7v-4.2V polymer Lithium battery.

Dual Micro USB 3.7v to 5V 2A Power Bank DIY Charger

Charging voltage: 3.7V

Overcharge Detection Voltage: 4.25 ± 0.05V

Overcharge release voltage: 4.23 ± 0.05V

Over discharge detection voltage: 2.45 ± 0.1V

Upper Limit Continuous Current: 5A

1S 3A BMS BATTERY MANAGEMENT SYSTEM LITHIUM CHARGER 18650 PROTECTION MODULE

BAT Discharging Stop Voltage:2.9V

Discharging Efficiency:85%(input 3.7V output 5V/1A)

Charging and discharging indication

Internally installed charging and discharging power MOS

Preset 4.2V charging voltage, precision ±1%

Max 8uA standby current

Integration charging management and discharging management

Intelligent temperature control and overtemperature protection

Integration output overvoltage protection, short circuit protection, overload protection

5V Step-Up Power Module Lithium Battery Charging Protection Board USB For DIY Charger

he smallest 802.11b/g/n Wi-Fi SOC module

Up to 160MHz clock speed

Built-in 10 bit high precision ADC

Supports UART/GPIO/IIC/PWM/ADC

Integrated Wi-Fi MAC/BB/RF/PA/LNA

ESP-07 ESP8266 Serial WiFi Module

LDR module 4 PIN

Operating voltage 3.3V-5V

Signal output indicator light.

LDR module 4 PIN

Able to detect ambient brightness and light intensity Adjustable sensitivity (via blue digital potentiometer adjustment)

LM393 Photosensitive Light-Dependent Control Sensor LDR Module

Brand new and high quality.

Base Material: FR4.

MICRO USB ( 5pin, B type, female connector ) to DIP (2.54mm pin pitch).

Micro USB Type B Mike Patch Straight Plug Adapter Plate Welding Head Breakout Board

Operating Voltage:+5V

Preheat Duration:20 s

Analog Output Voltage:0 to 5 V

Dimension:36x20x21 mm

MQ2 Flammable Gas and Smoke Sensor Module

Detecting range: 300~10000ppm

Signal output indicator.

Dual Signal output (analog output and TTL output).

The TTL output signal is low level, allows us to connect with SCM directly.

Analog output 0~5V voltage.

Quick response and recovery.

MQ-4 High Sensitivity Gas Methane (CNG) Detector Sensor Module

Operating voltage: DC 5 V.

The analog output voltage, the higher the concentration the higher the voltage.

The carbon monoxide detection with better sensitivity.

With a long service life and reliable stability.

Rapid response and recovery characteristics.

Range: 10 to 1000 ppm.

MQ7 - Carbon Monoxide Gas Sensor Module

Good sensitivity to CO/Combustible Gas

High sensitivity to Methane, Propane, and CO

Long life and low cost

Simple drive circuit

Input voltage: DC 5±0.2V

Current Consumption: 150mA

MQ-9 Carbon Monoxide Methane and LPG Gas Sensor Module

Sensitivity to Ammonia, Sulphide and Benzene steam

Sensitive for benzene, alcohol, smoke

Fast response and recovery

Adjustable sensitivity

Signal output indicator

Output voltage boosts along with the concentration of the measured gases increases.

MQ 135 Air Quality/Gas Detector Sensor Module For ArduinoMQ 135 Air Quality/Gas Detector Sensor Module For Arduino

It can be used with NRF24L01 wireless module

Add core nRF24L01+ Breakout Adapter with onboard 3.3V Regulator

Onboard 3.3V voltage regulator accepts your Arduino +5V supply and provides 3.3V for the attached nRF24L01+ module

Allows for easy connection to nRF24L01+ modules

Small power on SMD LED indicator

3.3V Adapter Board for 24L01 Wireless Module