I need a way to take 120VAC to under 80V DC, or alternating DC (going between 10V-70V)
i dont have much experience with AC stuff so just to double check...120VAC is 60V and -60V alternating in a sine wave.
**broken link removed**
im going over multiple things in my head and i just ended up confusing myself.
IF it is 60V alternating, i just need to know what cap to use to keep it from dropping below 10V at 180'degrees into the cycle (normally 0V) and ill just use a full wave bridge rectifier.
the positive stays positive, and the negative stays negative, and the voltage is switching between two voltages like a square wave or saw tooth or triangle and all that.
how bout a bridge rectifier and a horribly wasteful regulator?
the 120V would be coming for a couple seconds a couple times a day.
im trying to figure out a kind of "surge protection".
maybe ill just go with a relay and a micro.
i would prefer to use a regulator after the rectifier, that way my device will continue functioning during the 'spike'.
without the regulator i would need a secondary power supply in order to turn the relay on/off for a few seconds.
im also concerned with the relay method, i would have to detect the spike and disconnect the switch before it damages the rest of the circuit, where as relays are slow.
edit:
another option.
a reset-able fuse that would function under normal conditions then "blow" with the 120VAC spike, then have a micro check the fuse every couple seconds, and if its 'blow' reset it.
With out knowing exactly what your getting your power from since you stated the 120 volt Ac is not whats powering it and you have not given a specific regulated voltage range or current capacity we are still a bit confused as to what to recommend.
I need something to make my assorted stuff go. Got any suggestions?
With out knowing exactly what your getting your power from since you stated the 120 volt Ac is not whats powering it and you have not given a specific regulated voltage range or current capacity we are still a bit confused as to what to recommend.
I need something to make my assorted stuff go. Got any suggestions?
if i continue down the regulator approach, the 120VAC WILL be powering it for that couple of seconds, other than that the regular input will be 60V and somewhere around 100mA.
the current output for the regulator has to be lower than 70V.