Power INVERTER, with 555, circuit diagram (NEW), from 12V to 230V, 220V, 120V,ab.1$ command unit

ATTENTION : REQUIRES TUNING !!! The main principle (the "secret") of the command unit, is : The first 555 is in ASTABLE-mode, while the second 555 is in MONOSTABLE-mode, ...the two ICs are "walking conscious" (frequency tuning) on A LOOP COMMUNICATION-PATH (the NEW circuit uses *pin : 5*) !!! NOTE1 : The 555s, the transistors and the Tr. remain COLD ! NOTE2 : The 12V can be adjusted in order to obtain exactly 230V ! NOTE3 : The R2=130K determine about 55 Hz ! NOTE4 : Works also with a Tr. for 220V, or 120V ! PS : Many details at: * Kywdo111 * (YouTube channel).