MicroPython Forum (Archive)

so its working!

didnt need the relay after all, the 2n7000 did the trick!

btw cant upload the mp4 video

tnx man, got a little smarter today

i just bought a 100pcs pack of 2n7000 of amazon for 16euro, should rlast me some projects

just measured the input when not connected and it is 4.28v No. It is a 2N7000. You have to connect GND between NodeMCU and the Relay board, +5V (and GND) to the relay board, and then try to switch with a GPIO. I If you have a multimeter, you could measure the voltage at the Relay board input, when t...

btw, dont care about the hijack, love to hear from the old stuf, now days everything is so small, its (nearly)imposible to solder something out without wasting the component, its all dubble layerd pcb, if somthings faulty, its to the bin and buy a new part

haha great stuf; i am quite greatefull with chinatec these days :D at least we can have half reliable stuff for cheap, i cant imagine what it would have cost for a simple project to get up and going, if you have to bin somtransistor as from the above you got a realy bad week for smokes :D btw can yo...

so i could put from an external source 5v dc to the realy 'vcc'-pin and on the 'in'-pin the nodemcu output (pin 4),

but i tried that and the signal on the output pin, was to weak i guess, it just switched once and never again.

any ideas how to work around this one?

cool, i will look into it!

tnx MostlyHarmless, i will look into it
apreciate the help man!

i encountered another problem, the relay is 5v in the kit and the nodemcu only puts out a 3.3v so i ordered a pack of 3v relays, i tested it with a led and everything worked like a charm, but the relay just clicked once in a while. perhaps you could use a opamp circuit like: https://community.partic...