2021 Jun 22, 06:30 PM
(This post was last modified: 2021 Jun 22, 07:50 PM by astrogerard.)
It is a good practice to power the relays from another source. At first I would test the setup without connecting the power to the relays and only watch the behavior of the led's on the board.
So if you only connect GND next to IN1 to GN on the Pi and VCC next to IN8 to +5V on the Pi then you should be able to see led activity.
Be aware that the led will turn on when IN1..IN8 is pulled low. In SIP there is a setting called "active low" which should be set.
When everything works you can connect the extra power source to the relay part of the board (GND and JD_VCC with jumper removed)
Hope this helps,
--Gerard
So if you only connect GND next to IN1 to GN on the Pi and VCC next to IN8 to +5V on the Pi then you should be able to see led activity.
Be aware that the led will turn on when IN1..IN8 is pulled low. In SIP there is a setting called "active low" which should be set.
When everything works you can connect the extra power source to the relay part of the board (GND and JD_VCC with jumper removed)
Hope this helps,
--Gerard