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not sure if this is the right place to post, but basically I am trying to make a Love-O-Meter, similar to the Arduino project example.

However, my method of determining the score is different. Instead of basing it on temperature, I am basing it on capacitance instead (Let me know if you think there are better ways to determine the score. I have tried body resistance, but it is too insensitive and I have also tried making it random but it doesnt make sense and its not as fun)

Another difference is that I want to make it only measure when both people place 1 of their hands on the foil and their other hand holding onto each other. However, the issue I have is Im not sure how to start measuring when the condition I mention happens.

Link to code: https://pastebin.com/bWyiDtfB (Using reference from here: https://playground.arduino.cc/Main/CapacitiveSensor?from=Main.CapSense) (The code starts measuring the capacitance when it detects that both foils have their hands placed on it, i.e. when it detects that the capacitance exceeds a certain threshold, 200 for my case. It will then measure 100 samples and the score will be from the median of the 100 samples)
Link to fritzing diagram: https://imgur.com/YFmgizr (Ignore the black wire from A5)

  • I don't think you are going to get an answer here about a better way to measure "Love" So then your whole question boils down to wating to measure a connection between the two pads, as the two people would be completing the circuit between the two pads. Do a little research, build a small test program for this "Sensor" only and post that code if you have any other questions about the specific problem you are having. – Chad G Mar 3 '18 at 9:34
  • Basically the biggest problem I have now is to find a way to perform the measurement only when they hold hands and their other hand touch the foils. – Dominic Teo Mar 3 '18 at 9:40
  • that is simply a continuity test. Is there an electrical path from pad1 to pad2. It will be very high resistance, but there will be an electrical path between them – Chad G Mar 3 '18 at 9:41
  • I thought of trying to do that. Like connecting a 5V to 1 of the foil and the analog pin to the other, but it will interfere with the capacitance measurement. Should I maybe make 2 more foils (1 connected to 5V and the other to the analog pin) so each person have to touch 2 foils with 1 hand? – Dominic Teo Mar 3 '18 at 9:45
  • Should be able to do both. Can switch pin modes after deciding it us ready to start taking the reading. But them being joined could already effect the capacitance test – Chad G Mar 3 '18 at 9:48

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