hi all, im working on a project which is essentially a wireless sound operated switch.
Ive had some help from audioguru and others and i've built an opamp circuit and got the wireless modules working.
The issue now is that i need to somehow use the output of the opamp to get 5v for about 0.5 seconds.
upon testing the opamp circuit with a scope, its putting out at full gain about 8-10v peak to peak (ac) but very quickly aswel. With a diode to rectify it, I get a futher drop over the diode so it ends up only peaking at about 3-4v.
now i think i have a few options to switch 5v into my ic, use a cap ( if so what kind of value) to charge when the level goes high then maybe some kind of transistor to switch the 5v to the pin. Or, use another op amp stage somehow to bring the gain up further (5v) and feed that directly into the ic.
what route do you guys think I should go down?
thanks