12v Trigger Relay Outlet

Last crawled date: 4 years, 2 months ago

Obligatory warning: Wiring involves main electricity. Do not wire while live. Do not attempt build unless you know what you are doing.
I use a vintage amp that does not have a 12v trigger line. It also lacks a remote and I'm lazy. This uses a 12v trigger relay from my receiver to switch power. Power in through an IEC cable and out through a 3 prong outlet.
BOM:
12v relay: https://www.mouser.com/ProductDetail/655-T9AP1D52-12
Panel mount IEC: https://www.parts-express.com/parts-express-iec-ac-power-jack-chassis-mount--090-442
Panel mount 3 prong: https://www.mouser.com/ProductDetail/562-738W-X2-01
Heatsink: https://www.mouser.com/ProductDetail/567-642-35AB
3.5mm panel mount jack (mono or stereo)
8 x 3mm screws
2 x 3mm nuts
14-16 & 18 awg wire
4 female .25 terminals
Build:
Put all the pieces together without screws. This will help ensure the wiring goes where it is needed. I'm not sure if the relay needs a heat sink but I had one laying around. I attached it to the back of the relay using thermal tape. It should be flush on the bottom. Be sure to orient the fins horizontally so that air can flow from end to end of the box.
Solder wire ground and Neutral from both outlets together using the larger wire
Create two wires with female terminals using the larger wire to connect the outlet hot pins to the relay switched output
Wire the tip of the 3.5mm to one end of the trigger pin on the relay using a female connector. Wire the ground (and barrel together, if using stereo) to the other trigger pin relay
Test 12v trigger using 3.5mm cable from source. Check continuity on the hot line and make sure that none of your wires are crosses/shorted.
Put the lid on before testing with mains connected
Plug in power to the box but DO NOT CONNECT A DEVICE. Test power at the output.
Enjoy your switched outlet