Hi
I can go on about my question, as you have mentioned. I have a PI-3 which I wish to use for a Remote Appliance Controller. I have a C program working, which can turn on a LED with a pause intermittently changing the status of the LED. Hence the programming is not my concern at this time. I have the relay module, which I have shown in my earlier post, and I am trying to get it working with the intermediate board shown. I am confident that the circuitry on the middle 'pull down circuit' has followed the circuit as shown on my posted photo on the right bottom of the photo. I would welcome a means to test it but it is passive and should not create any harm to the PI.
As I am not a pro at building these things, I want some advise on my specific wiring and powering of my setup.
I understand that the Relay Module works on 'low voltage' (zero volts) as it actuates the relay by pulling the GPIO pin to ground, through the intermediate light yellow board circuits (hopefully).
I am concerned that I may damage my PI-3 and therefore want some guidance. My specific wiring is to use an 120 Volt Adapter which will provide the 5 Volts to power the Relay Module isolated from the GPIO pins. I have a quality adapter that is putting out 5.5 volts with no load for this purpose. I have connected the ground for the Relay Board to the GRD on the relay module next to the VCC and JD-VCC pins. The Jumper is currently on the VCC and the JD-VCC and I am not sure that is correct? Should it be removed.
Hence it is different than the diagram I posted, as it uses 5 Volts NOT from the raspberry PI.
I am using a ground and IN1, IN2 etc for my 8 chosen pins from my GPIO, using Dupont connectors. I have sorted out the pins issue as it relates to the programming interface. I have connected the GRD from the PI to the GRD right next to the IN1 pin. Since I assume the middle constructed board is 'pulling to ground', I have no connector on the VCC, next to the IN8 pin (on the relay module) shown on the posted photo. I connect the Ground to the GRD next to the IN1 pin.
I am assuming that since the 5 Volt power is totally isolated from the PI it should cause no harm to my PI. Am I OK with this approach?
I can go on about my question, as you have mentioned. I have a PI-3 which I wish to use for a Remote Appliance Controller. I have a C program working, which can turn on a LED with a pause intermittently changing the status of the LED. Hence the programming is not my concern at this time. I have the relay module, which I have shown in my earlier post, and I am trying to get it working with the intermediate board shown. I am confident that the circuitry on the middle 'pull down circuit' has followed the circuit as shown on my posted photo on the right bottom of the photo. I would welcome a means to test it but it is passive and should not create any harm to the PI.
As I am not a pro at building these things, I want some advise on my specific wiring and powering of my setup.
I understand that the Relay Module works on 'low voltage' (zero volts) as it actuates the relay by pulling the GPIO pin to ground, through the intermediate light yellow board circuits (hopefully).
I am concerned that I may damage my PI-3 and therefore want some guidance. My specific wiring is to use an 120 Volt Adapter which will provide the 5 Volts to power the Relay Module isolated from the GPIO pins. I have a quality adapter that is putting out 5.5 volts with no load for this purpose. I have connected the ground for the Relay Board to the GRD on the relay module next to the VCC and JD-VCC pins. The Jumper is currently on the VCC and the JD-VCC and I am not sure that is correct? Should it be removed.
Hence it is different than the diagram I posted, as it uses 5 Volts NOT from the raspberry PI.
I am using a ground and IN1, IN2 etc for my 8 chosen pins from my GPIO, using Dupont connectors. I have sorted out the pins issue as it relates to the programming interface. I have connected the GRD from the PI to the GRD right next to the IN1 pin. Since I assume the middle constructed board is 'pulling to ground', I have no connector on the VCC, next to the IN8 pin (on the relay module) shown on the posted photo. I connect the Ground to the GRD next to the IN1 pin.
I am assuming that since the 5 Volt power is totally isolated from the PI it should cause no harm to my PI. Am I OK with this approach?
Statistics: Posted by robertdaleweir — Mon Feb 24, 2025 6:49 am