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12 VDC TO 117 VAC / 60HZ POWER INVERTER

2015-03-21 12:26  
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12 VDC TO 117 VAC / 60HZ POWER INVERTER
Capacitor C5 and potentiometer R12 figure out the frequency of the output signal at pin number 3 of IC1, the 555oscillator. The output signal is differentiated by C3 and C4 before it’s input to the base of powertransistors Q1 and Q2 through diodes D1 and D2, respectively. The signal from IC1 is adjusted to 120 Hertz,because the flip-flop created by transistors Q3 and Q4 splits the frequency by two.