Apologies, this has surely been answered but not in language I can understand. I have a cooling fan, connected to a Niles AC3 (a voltage triggered power strip), which is connected to the 12V turn on lead of an audio receiver. When the receiver is powered on, the power strip is active and powers the fan, a DC fan that runs off of a mobile phone type transformer to USB. It is in a closet with my computer. Usually that stays cool enough, but using for extended periods creates a lot of heat. Is there a switch I can buy so that if my receiver is off, I can manually switch on the fan? I've been looking at some solutions, usually for generators or nautical applications. Saw the thread below on using a three way switch, but do not know if that would work for this.
My ideal solution would just be a switch I can flip when the receiver is off but I want the fan on.
Any suggestions or links very welcome. https://www.garagejournal.com/forum/archive/index.php/t-248408.html