Cant turn relay on and off

2 years 8 months ago - 2 years 8 months ago #3706 by hassesthlm
I just have 1 relay connected to rasberry pi 3B and nothing happens
cant turn it off or on :-(
it´s only show the windows that say it´s ON or OF but the relay still quiet
whats is wrong :-(

changes the vvc fron 5v pin to 3,3v pin and now it´s almost works, but if i hit the ON it´s going of and OFF it´s on
how can i changes that :ohmy:
The following user(s) said Thank You: essenemari

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2 years 4 months ago #3810 by furs
Hi, I have the same problem. Have you found the cause?

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1 year 7 months ago - 1 year 7 months ago #3918 by essenemari
Hi! Seems that I have the same problem on my end. Have you found a solution?

Please let me know.

My case:
Once Raspberry PI GPIO Driver switched to "enabled", relay turns on and is never going to switch off (physically) even trying to turn it off by added node. It may be turned off only by changing direction from Output to Input...

Issue occurred:
RPi 2, Mobel B v1.1, chosen version A+, B+, tested on PIN 7 (GPIO04) and PIN 33 (GPIO13), easyiot_v0_9

//edit 12 hours later
downloaded also fresh version of easyiot_v0_9, unzipped and replaced currently used RPiGPIODriver.dll with new one but it did not helped.


//edit 20 hours later - SOLUTION
by using multimeter I realized that RPi GPIO Vout is NOT 5V, as I initially assumed, but around 3.5V, so controlling a 5V relay "may be difficult".

Solution is using shift level presented here - Connection section (where 2N2222 is used) .

Hope it helps :)

Thanks!

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