This image is created using Fritzing. Click to enlarge image ※ NOTE THAT: The above wiring diagram uses normally open mode. Therefore, only COM and NO are used. NC is not used. If 4 devices that are controlled by a relay shield use the same voltage, we can use a single high-voltage...
Learn how to use relay with Arduino, how relay works, how to connect relay to Arduino, how to code for relay, how to program Arduino step by step. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to
The thermistor part of the circuit is set up as a voltage divider. The value of the resistor should be the same order of magnitude as the thermistor. For example, I’m using a 10K Ω thermistor, so the resistor should be 10K Ω as well. If you use a 100K Ω thermistor, use a 100...