Cheap 20A Remote Power Strip

[river]

Hello DIYers, this is a cheap 20A(fused) remote turn-ON/OFF power-strip/surge protector that has been made from an old UPS chassis, a 30A 3-pole contactor(24VAC coil) and some salvaged parts, it was first a push-button manual turn-ON with the 3rd pole uses as auxiliary contact then later modified, so the front power button now acts as a momentary test and the rear switch disables the unit, also the 3 leds has been assigned to disabled, ready and power-ON/OFF status.



The remote circuit module uses a common 2N2222A transistor and a SPDT 12v relay and can be used with most A/V equipment with a trigger voltage from 5~15vdc, for more details about the simple circuit, I've posted HERE the basic schematic with part numbers as well.

Currently using it to auto turn-ON/OFF two Samson S2000 amplifier and a Driverack PA2 with my PT-100 preamp with great results so far.

Regards

[alexw]

Sweet!

[leonski]

Very good 'repurposing'. And at minimal $$$, which is important.

[novisnick]

Nice project!
Well done! 👏👏

[donh50]

Neat project. Guess you have to register to see the schematic?

I built a relay circuit ages ago using a more complex design to provide a time delay at turn-on and instant turn-off to use with a power amp.

[river]

Hello, sorry for the late reply and thanks for the kind words.

As an update, the last modifications I've made to the unit was the addition of a time delay module with just few secs on-make for amplifiers protection against quick power flickers, also changed the funny looking RCA with the original RJ45 connectors PCB using pin 1 and 2 for the REM in/out.

Here are the shots including the basic 2N2222A switching schematic:

Regards