# Switches and Relays

[](https://arduinogetstarted.com/tutorials/arduino-relay)

[](https://radiostud.io/howto-i2c-communication-rpi/)

Types of switches:

- Push on/off
- Toggle on/off
- Magnetic
- Capacitance
- Resistance
- Proximity
- Temperature
- Pressure

[](https://www.electronicshub.org/switches/)

[](https://electronics.stackexchange.com/questions/113574/understanding-a-circuit-for-reading-current-passing-through-human-bodies)

[](https://learn.adafruit.com/adafruit-4-channel-adc-breakouts/python-circuitpython)

[](https://www.instructables.com/Capacitive-Switch-for-Arduino/)

[](https://electronics.stackexchange.com/questions/444488/how-to-build-a-human-chain-detection-circuit)

[](https://www.youtube.com/watch?v=m5PfKb8p1YI)

[](https://forum.arduino.cc/t/human-chain-body-conductivity/634793)