The CodeĪfter everything is connected, upload this code to the Arduino: #include See our article on Making an Arduino Temperature Sensor for more information. If you do use a 100K Ω thermistor, you’ll need to change line 7 in the code below to Temp = log(100000.0*((1024.0/RawADC-1))). If you use a 100K Ω thermistor, use a 100K Ω resistor. For example, I’m using a 10K Ω thermistor, so the resistor should be 10K Ω as well. The value of the resistor should be the same order of magnitude as the thermistor.
The thermistor part of the circuit is set up as a voltage divider. It’s dangerous to put the relay on the neutral wire, since if the device fails current can still fault to ground when the relay is off. This way the relay is on the hot side, and current is switched before it reaches the light bulb. Connect the side leading to the light bulb to the NO terminal of the relay, and the side leading to the plug to the C terminal. The green light turns off now, but the relay doesn't switch (no clicking sound).Identify the hot power wire (red wire in the diagram above) in the cord leading to the light bulb and make a cut. What else have I tried: I tried giving the 3.3V pin to the relay instead of the 5V. I do notice that the green light's intensity dims a very little (but still stays on). After that, in spite of the output of this line: "Serial.println(digitalRead(relayin)) ", showing that the Arduino101 is toggling the pin "HIGH" and "LOW", When I download the program, the red light is on (indicating the relay is in the "off" state), then once the program starts, it turns the green light on. No other connections at the moment to help me debug. My pin 10 connects to the relay's "in" pin. My Arduino pin gnd connects to the relay's gnd My Arduino pin 5v connects to the relay's vcc What I have done so far: To isolate and simplify the issue, I took out the wiring in the NO/NC terminals, so that by just hearing a click I can tell if the relay toggles back and forth: What I intend to do: Turn on a SRD-05VDC-SL-C relay based on a signal from an arduino101 Hi, I was hoping to tap into the vast expertise for my simple project.
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