24/12/2024 5:35 am
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Is it possible to connect multiple sensors to a single Arduino pin? If yes, what are the best methods to achieve this without causing damage to the sensors or the Arduino?
I’ve read about techniques like using multiplexers, resistor networks, or protocols like I²C and One-Wire, but I’m unsure which approach is most effective for different sensor types.
Additionally, what precautions should be taken regarding voltage, current, and power requirements when connecting multiple sensors to ensure the setup works safely and reliably?
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26/12/2024 5:06 am
To connect multiple sensors to a single Arduino pin, you can use analog multiplexers like the CD74HC4067 for switching between sensors or voltage dividers to differentiate analog signals with unique voltage levels.
For digital sensors, the I2C protocol allows multiple devices to share the same SDA and SCL pins, provided each has a unique address, while one-wire sensors like the DS18B20 can all connect to a single pin.
Address decoding or demultiplexers can enable one sensor at a time, and logical gates can combine binary signals effectively. Ensure proper power supply, avoid signal interference, and adjust your code for accurate sensor handling.
