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Plug & play connectivity for educational and DIY electronics is improving. STEMMA is an eco-system of breakout boards and sensors to expand your Feather, Arduino, Microbit, Raspeberry Pi, Adafruit Circuit playground, Adafruit CLUE.
There are three types of STEMMA connectors;
You can read technical specification here.
JST PH 3 or 4 Pin (2.0mm pitch)
JST SH 4 Pin (1.0mm pitch)
Proprietary 4 Pin (2.0mm pitch)
Power Pin Voltage
Logic Pins Voltage
I2C only on 4 pin. Analog/Digital/PWM on 3 pin.
I2C/Analog/Digital/PWM on 4 pin
I2C or UART on 4 pin. Analog/Digital/PWM on 3 pin.
If you are after comparison of Grove, STEMMA, Gravity, QWIIC look here.
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