This polarity inverter circuit for voltages down to about -12 V was found in the December 1992 issue of Radio Electronics magazine. The current is a few mA.
Of course, the current is extremely small, but a voltage of 300 V can be obtained from 9 V of a...
This battery monitor circuit with the TLV379 low voltage operational amplifier was obtained in the...
This circuit can be connected to the output of alarms or sirens with the 555, CMOS or TTL,...