So my effort of setting up a d1 mini to handle a MAX6675 and two relays continue.
The 5v out from the d1 mini powers the relay board fine, but do I need to figure out some levelshifter of some sorts for the GPIO’s to have it powerfull enough to pull the relays?
And if so, any good suggestions for two relays? I have a a bunch of sn74ahct125n 's from my wled project, can I use that somehow, and if so, how do I wire it up?
I found this image with google:
So does that mean that the 'A’s are 3.3v input, and the 'Y’s are 5v output? So I can put the two relays on pin 3 and 6 and the GPIO’s on 2 and 5? What are the OE thing, is that just for ground? So I should ground to 1, 4 and 7?
I guess the first thing to do is see if 3.3V from a GPIO pin will trigger those relays - it might. If not then a level shifter should work. I managed to find some 3.3V relays - you can pick them up but they take a bit of hunting down.
Hmm, ok, that made me look very closely on the page, but I didn’t find it anywhere, until I checked the FAQ
I’ll try and wire it up directly, crossing fingers
Hey that worked, I used D1 and D2 for the relays, and apart from me having an inverted relay, and it won’t remove the inverted somehow, it works Weeheee, thankyou @nickrout , @deckingman and @sender for helping out, not as complicated as I feared.
And I found a change in the new esphome, which explained why I felt that it didn’t save the changes.
Previousy when you did a ‘flashing’ which is now an ‘install’ it saved the code first. It doesn’t do that any more
Weeheee, thankyou 