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by Grenello
Thu Oct 26, 2017 5:17 am
Forum: Troubleshooting
Topic: induction problem gpio relay load
Replies: 38
Views: 9912

Re: induction problem gpio relay load

Just an update to my problem. I tried putting in a snubber circuit but nearly burnt my house down as the resistor got so hot and burnt out - I think I wasn't using the right type of resistor. So I've abandoned that plan for now, but plan on returning to it later. I purchased a 5v Solid State Relay a...
by Grenello
Sat Oct 21, 2017 5:36 am
Forum: Troubleshooting
Topic: induction problem gpio relay load
Replies: 38
Views: 9912

Re: induction problem gpio relay load

:o I feel so stupid. I put it in so long ago that I forgot it was 24v AC. Sorry for leading you astray. The problem still remains and this probably complicates the solution as mentioned above. Given my limited electronics skill and experience I don’t want to guess, so again your continued help in so...
by Grenello
Fri Oct 20, 2017 5:17 am
Forum: Troubleshooting
Topic: induction problem gpio relay load
Replies: 38
Views: 9912

Re: induction problem gpio relay load

Thank you for your responses. I will locate an AM radio and do that test a bit later today. Could you suggest a cap value for the load side - Its a 24v DC circuit running to a solenoid for garden sprinklers. Please find picture of circuit attached for info and also for any suggestions for improvemen...
by Grenello
Wed Oct 18, 2017 2:03 pm
Forum: Troubleshooting
Topic: induction problem gpio relay load
Replies: 38
Views: 9912

Re: induction problem gpio relay load

Yes, you are quite right. After turning OFF the relay (GPIO from HIGH to LOW), I get massive feedback on a number of INPUT pins that are listening for momentary switches - its as if I have hit all 4 switches at once - all 4 interrupts get triggered as a result. Not being an electronic engineer, I am...
by Grenello
Tue Oct 17, 2017 8:56 pm
Forum: Troubleshooting
Topic: induction problem gpio relay load
Replies: 38
Views: 9912

Re: induction problem gpio relay load

Hi Did you solve this problem? I am experiencing exactly the same thing. I have tried to isolate the relay board from the RPI using both NPN / PNP switch and also with optocouplers. Nothings seems to work. Everytime I send a "LOW" to the relay board, all the other GPIO pins get feedback and seem to ...

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