Phrazemaster
Well-known member
Hiya gang,
I'm building a green pre and I thought it'd be nice to have illuminated push buttons for phantom, hpf and phase. I worked out a dpdt for the phantom and led, but for the other 2 it seems like a relay would be the way to go. So I found this circuit, which seems promising, but being pretty green with electronics, I don't fully understand it. Can anyone shed a little light on it (see link below). In the upper left of the image there is a 3v power supply, but I don't see how it even ties into the circuit at all...
And what do you think of using this to drive the hpf and phase with a dpdt, and 3formC relays...am I just making this way too hard? Maybe someone has already made a board to do this; I've spent a lot of time looking and have had some near-hits but not quite.
http://discovercircuits.com/DJ-Circuits/OnOffLatchingRelayDriver1.pdf
PS I do have some small 4pdt illuminated switches, but I thought it would be nice to use some larger "beefier" looking switches with relays instead.
I'm building a green pre and I thought it'd be nice to have illuminated push buttons for phantom, hpf and phase. I worked out a dpdt for the phantom and led, but for the other 2 it seems like a relay would be the way to go. So I found this circuit, which seems promising, but being pretty green with electronics, I don't fully understand it. Can anyone shed a little light on it (see link below). In the upper left of the image there is a 3v power supply, but I don't see how it even ties into the circuit at all...
And what do you think of using this to drive the hpf and phase with a dpdt, and 3formC relays...am I just making this way too hard? Maybe someone has already made a board to do this; I've spent a lot of time looking and have had some near-hits but not quite.
http://discovercircuits.com/DJ-Circuits/OnOffLatchingRelayDriver1.pdf
PS I do have some small 4pdt illuminated switches, but I thought it would be nice to use some larger "beefier" looking switches with relays instead.