This circuit is from a 1990 Philips Databook. The circuit uses a symmetrical source and power from 15 to 40 V. Performance information is given in the table below.
This low power metronome produces pulses in a small loudspeaker. Pule rate is adjusted by P1 and...
This simple two-transistor capacitance meter uses a 50 uA microammeter as an indicator instrument. The...
Found in a publication from the 60's, this power supply has no regulation, but only current...