• MULTIPLE CHARGING METHOD: This module is made for charging rechargeable battery/batteries using the constant-current/constant-voltage (CC/CV) charging method, charging port can take power from micro USB. The input has a MIRCO USB socket, which can be used to directly charge with the 5V mobile phone charger, and still retains the input voltage wiring solder joints, which can be very convenient DIY….Input voltage: 4.5~5.5V
• MULTIPLE PROTECTION’S: This module is used for single lithium ion / lipo / 18650 cell or multiple cell in parallel, this board have overcharge, over discharge and overcurrent protection; battery over-discharge protection voltage is 2.5V, battery over current protection current is 3A
• ADJUSTABLE CHARGING CURRENT: The charge current can be modeled externally with the Rprog resistor R3……Default Output is 4.12V ~ 4.2V and 1AMP ….This can be connected with other module / robotics project or also or this work with other modules efficiently also like custom torch, light , solar cells, bluetooth, testers , wireless circuit, adaptors, buzzers, powerbank, camera, temperature sensor, audio circuit / headphone amplifier …etc.

• Measures the distance within a wide range of 2cm to 450cm | Stable performance | Accurate distance measurement | High-density | Small blind distance
• Dimensions: PCB size(LxW):45x20mm | Sensor cover diameter:16mm
• The Ultrasonic Sensor uses ultrasonic waves to determine the distance of an object. Therefore, it can be used as a distance measuring sensor. It can be used to measure the depth of water as waves can travel in water, detect and avoid obstacles in the path of a robot and also as a parking assist sensor.
• Working Voltage:5V(DC) | Static Current:Less than 2mA | Output Signal:Electric frequency signal, high-level 5V, low-level 0V | Detection Distance:2cm-450cm | High Precision:Up to 0.3cm | Input Trigger Signal:10us TTL impulse | Echo Signal:output TTL PWL signal | Model:HC-SR04 | Frequency(Hz):40000 | Sensing Angle:15° | Sensor Type:Ultrasonic | Output:Digital Sensor || Wiring: +5V(positive), Trig(control), Echo(receive), GND(negative).

It Can be used for 3-5V DC power supply modules. It has a red power indicator.

• IR Infrared Obstacle Avoidance Sensor Module can be widely used in robot obstacle avoidance, obstacle avoidance car, line count, and black and white line tracking and so on
• The output port OUT sensor module can be directly connected to the microcontroller IO port, you can directly drive a 5V relay
• It has a pair of infrared transmitting and receiving tube, tube infrared emit a certain frequency, when detecting direction meet with obstacles (reflecting surface), reflected infrared receiving tube, after the comparator circuit processing, green indicator will light up, at the same time signal output interface to output digital signal (a low level signal).
• Obstacle sensing LED and Power LED

This is a 5V Step-up booster module for Lithium Battery Charging and protection Protection. It can be used for DIY power bank as it can provide 5V 1A output voltage with the input of 3.7V.

Features and Specifications:

• Battery discharging stop voltage: 2.9V.
• 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.

• The I2C module makes connection and programming a display easy. It translates the data received from the I2C Bus into parallel data that is required for the LCD Display. The I2C interface module will let you realize data display with only 2 wires.
• Flexibility in connections | Reduces overall wirings | Can have 8 modules on a single I2C bus | Backlight can be enabled or disabled