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  • ikenda1 commented on vina1991's instructable 220V HOMEMADE PORTABLE POWER INVERTER1 year ago

    Check your 4047 ic,it might b fault or your MOSFETs.because that's exactly what happened when I started building inverters

    To know how long the battery would last, multiply your battery volt and amps together and the divide by your total load valu(I.e load of 100w 12v * 7ah/100w.°. 84/100=0.84hours)

    U can use a step down transformer just use the 12 side or 9v side and connect it to the MOSFET and that's all

    5a 220v transformer is more than enough to power ur 15w bulb

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