Hi,
thx for the github project, works like a charm.
I have a few questions, maybe someone has an answer to it:
- I want to connect 3 relais boards (2x8 channel + 1x4 channel). I have connected the 2 relais with 8 channels to the 5v pins of my raspbery pi and the 4 channel relais to the 3.3v pin. The relais are all 5v, but I've connect the 1x4 channel relais to the 3.3v pin and it also works. Is this dangerous, or is it ok, to connect a 5v relais to the 3.3v pin?
- I have read somewhere, that you should use a resister between PI and relais boards, to limit the current. Is this really necessary?
- Some LEDs on my relais boards are lit very dim at startup and stays at this level. I think this is because of the default GPIO levels, after startup of the PI. If the relais is swichted one time, the LEDs are dark. Maybe you should initialize all the pins, at startup to LOW voltage state.
thx for the github project, works like a charm.
I have a few questions, maybe someone has an answer to it:
- I want to connect 3 relais boards (2x8 channel + 1x4 channel). I have connected the 2 relais with 8 channels to the 5v pins of my raspbery pi and the 4 channel relais to the 3.3v pin. The relais are all 5v, but I've connect the 1x4 channel relais to the 3.3v pin and it also works. Is this dangerous, or is it ok, to connect a 5v relais to the 3.3v pin?
- I have read somewhere, that you should use a resister between PI and relais boards, to limit the current. Is this really necessary?
- Some LEDs on my relais boards are lit very dim at startup and stays at this level. I think this is because of the default GPIO levels, after startup of the PI. If the relais is swichted one time, the LEDs are dark. Maybe you should initialize all the pins, at startup to LOW voltage state.