Apologies if this is an inappropriate question here, but I have a requirement to program short time delays for a 12V trigger signal to turn on Audio amplifiers in series rather than in parallel. My AV receiver has a “12V Trigger Out” connected via 3.5mm mono cable to Amp #1, then Amp #1 has a 12V trigger out connected to Amp #2, then Amp #2 has 12V trigger out connected to Amp #3. Even though each Amp’s outlet is on a dedicated 16Amp circuit, the power draw of three 1000 Watt amplifiers turning on at the same time trips the circuit breaker. What I would like to have is a programmable box that would take in 12V trigger signal from the AV receiver, then send Amp #1 a 12V trigger signal via 3.5mm jack, wait [15 seconds], then send Amp #2 a 12V trigger signal via 3.5mm jack, wait [15 seconds], then send Amp #3 a 12V trigger signal via 3.5mm jack, etc.
I could also use a couple of other trigger outputs and even another 12V trigger input (that would ideally be autosensing and have a different subset of 12V trigger outputs).
Does anyone either know of such a thing, or have any suggestions how I would build such a device? I’d be willing to pay for advice or even the device if someone could build it for me ;-)
Thanks in advance for any advice or pointers.