If you keep to single rail and with an AC coupled feed to the headphones then the relay can be driven without the need for a 'floating' gate drive (so no photovoltaic couplers needed).
You could also arrange it to shunt the phones. This might be a better idea because the series connection would need a fixed resistor placed to charge the coupling cap (not shown).
You could also arrange it to shunt the phones. This might be a better idea because the series connection would need a fixed resistor placed to charge the coupling cap (not shown).
That looks pretty good! Nice, compact and easy to reproduce for multiple projects. Nice work
That seems like a easy schematic to adapt and indeed a possibly better option as the shunting wouldn't interact with the audio at all. All that is left is a simple timing circuit which has plenty of different possibilities. could even use a ATTiny if i wanted to (I may not be experienced at Audio, but i have done plenty of other kinds of projects.).
I also came across this particular Relay i was wondering if anyone had experience with. The so called "PhotoMOS" AQV series by panasonic. it caught my eye as it is a small 60vac,550ma relay designed for switching signals with decent ratings. i came accross them while looking at their APV mosfet driver series which share the same tech.
Yeah their rds(on) isn't the best (btw, i meant the AQY series...i mistaken a V for a Y), but for simple switching it can be interesting... tough even then a pair of tiny signal fets probably get better performance (even the cheap ones have rds(on) below 1/0.5 ohm). The IRF2907 is probably a bit overkill for my purposes, but the great thing about fets is that no matter how specific your demand is, chances are that there is a perfect fet out there for one's project...just a matter of sifting through large lists and clumsy filters.
Fets are awesome.
Fets are awesome.
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