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0.1" (2.54mm) Long male header 1 row / 40 pins (Wire Wrap headers)
This is a long male header, very useful for a lot of things, including to plug boards like the arduino on your protoboards.
2.54mm spacing, 1 row, 40 pins. 18 mm long Header Pin Male
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This is a basic, 4-digit 7-segment display - red in color. It's common anode. The display features one decimal point per digit, and individually controllable apostrophe points. The LEDs have a forward voltage of 2.1VDC and a max forward current of 20mA. The hardware interface is twelve (two rows of six) through-hole pins.
This is a 5V 8-Channel Relay module, It can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM and MSP430.
SN74HC08N Quad 2-input AND gate
This is a splittable 40 pin male-female jumper wire, it is super flexible, can be transformed from 1-40 pin jumper wire. With some of these, you will no need to worry about the jumper wires you got before do not fit your project, just split it and go.
Power and Energy
The LiPo Charger is extremely affordable and easy to use. No programming is required. Plug it in and it works. The internal charger IC handles all the power flow between the various components.
With it you enter in resistance.
“An open-source firmware and development kit that helps you to prototype your IOT product within a few Lua script lines” Based on ESP8266 ESP12E wifi board, on-board USB-TTL support directly flashing from USB port, also on-board power circuits and all IOs setup.
The DHT-22 is a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn't require extra components so you can get right to measuring relative humidity and temperature.