Relay not running
June 3, 2024, 21:12
I am trying to use a relay to turn a vacuum pump off an on but it is not working properly
apologies fro the current hodge-podgeish set up
the power indicator light is on, and the IN2 light does change according to my python code
but the component doesn't turn on and off 🤔
Can you show a small drawing of the connections and components?
I think this is right?
I didn't draw the bread board though
No problem with that the connections from the relay board are marked as you wrote on paper? So it's not opto isolated?
wdym?
does that have something to do with an octocoupler
I remember something like that being said when I was watching a video about them
I'm just trying to understand why the brown wire goes also to the raspberry
i just know that its a 2 channel but I just drew one for the picture
Can you show a photo where the markings/text on the relay boards is visible
this was a circuit I found from an Instructables
ye
Yes this should be more or less correct, nothing of the pump should be connected to the raspberry
right
idk why its not working
another digram from a different video I was watching
though he didn't use the exact relay
The fact that it's not even clicking when you turn on or off makes me think that you are not bringing 5V maybe
If you have a seller link for the relay board or something I can look into it
oh wiat
💀
<@727760346387054623> would this be why?
Well this is 12V relay so with 5V or 3.3V (depending on what wire you brought) it's normal it didn't turn on
<@727760346387054623> is it possible to use signal from raspberry pi but different power source?
like use that same 12 volt power source for the dc in and out
Yes with a level converter tho not directly
It's a small board for converting logic signals to different voltages
or I could just get 5 volt relays?
That in theory is probably simpler yeah, even tho raspberry has 3.3V power so some sort of conversion is probably already being done on the board
If you send me the link I can look at the circuit
Hua HAI JI3PCS 2-Channel DC 12V... https://www.amazon.com/dp/B0CLGTCLMW?ref=ppx_pop_mob_ap_share
They are pretty vague cause they specify Arduino signals are not for the board, but like, 3 lines above they say it's Arduino compatible 🤣
🤷 lol
only 2 ratings too lol
would these work?
<@727760346387054623>
These probably not, from the specs:
Trigger Voltage(LOW): 0 - 4V Trigger Voltage(HIGH): 4.5 - 12VSo since raspberry sends 0 to 3.3V it's probably always count as low
Idk if it's wrong the specs tho maybe, cause it says 12V instead of 5 there
raspberry pi has two 5 volt though
does it not?
or is the signal pins max of 3.3volt?
and thats just for constant power
im dumb lol
Yes pins signals are 3.3, but I found this:
If this is indeed the schematic for the board you have you can use it with raspberry, you need to remove the jumpers with H and L written and connect
3.3V to the middle wire, 12V on the DC + and - and the pin on the channel input
I think I'd rather use 3.3 volt relays 😅
Can't guarantee 100% tho this is the schema of your board even tho it seems like it
but thank yoiu
Or you can use a level converter, it's hard to find 3.3V relay
<@727760346387054623>
Uh yeah they seem ok, otherwise my link above is for a level shifter in case you need it for other boards and stuff
aight bet, thank you a lot