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+--- Thread: power bar wiring question (/thread-265.html)
power bar wiring question - lumpylipton - 01-15-2018
Hi,
I'm a little confused on the power bar wiring (the first power bar, with the 12 v power supply in it. So I connect the wires to the vga connector, 1-8 signals and black to ground pin. The other ends of these wires connect to the corresponding relay board pins. I don't connect the white wire to the VGA connector (power), instead I connect the white wire to the 5v + side of the regulator. The regulator gets 12v power and ground from the power supply (in parallel with the dc jack that goes to the controller). Where do I hook the ground to on the 5v side of the regulator? My thought was wiring it to the extra ground point on the relay board. Is that ok? Did I miss anything? I looked at the diagram and description in the instructions, but it didn't make complete sense to me.
Thanks,
Warren
Further to this, I did some testing. First, the 5 volt regulator seems to put out closer to 8.7v on the 5 v side, which seems pretty high. My outlets are on by default, with 3.3v on the pins and while I see the voltage drop when I toggle the pins via the touchscreen, the voltage drops to .45 v, but the relay never switches, it just stays on. The indicator LEDs in the power bar dim when I toggle, but don't turn off completely.
Ideas?
Thanks,
Warren
RE: power bar wiring question - Rob F - 01-16-2018
Hi Warren, I think you have it correct, power and GND into regulator and then power and GND out of regulator into relay board. They likely stay on all the time because there's 8.7v coming out of regulator. You'll see a small screw on the regulator, you can adjust the voltage with that to 5v and it should be ok.
RE: power bar wiring question - lumpylipton - 01-16-2018
(01-16-2018, 02:28 AM)Rob F Wrote: Hi Warren, I think you have it correct, power and GND into regulator and then power and GND out of regulator into relay board. They likely stay on all the time because there's 8.7v coming out of regulator. You'll see a small screw on the regulator, you can adjust the voltage with that to 5v and it should be ok.
Yes, that did it. I didn't see the little SMT trimmer on that board. Adjusting it down to 5v made it work as expected. Thanks!
Warren
RE: power bar wiring question - Rob F - 01-16-2018
Great, glad you got it working.