now before i buy components, i thought i would bring up the idea here.
working with a 12Vdc power source, i need to generate 12Vac for a alarm system (pre-bought, and can't change power needs).
now, i can't seem to remember, but can an H-bridge generate 12V AC (square-wave)? i think it would, as it would work like an inverter. for current, we are talking about 400ma.
i would use a large-ish H-bridge, in case of surge currents.
the reason i ask is, i have someone telling me it would generate 24V AC, not 12V AC. but i think they are thinking of a half-bridge, not a full H-Bridge.
i tried the alarm system on 12V DC, but i think it must have a sensor to check for AC power, before it will go off battery backup. i need the alarm to run off my solar battery bank (voltage fluctuations are within range for alarm power input, when charging batteries). worst case scenario, i can get a 12V DC - DC Buck-boost converter to feed the inverter circuit regulated 12V DC for stability.
i have tried using a 12V DC to 120V AC inverter, followed by a 120V AC to 12V AC transformer, but it is much too inefficient in the conversion process.
My plan is to generate the signal for the H-bridge using an atTiny. no monitoring needed, so the program i write will be very simple (startup, and generate signal forever)
i just need to confirm that as i figure, that it will result in 12V AC, not 24V AC as i have been told by someone local, that i don't think knows the difference between a half and full H-bridge.