The circuit selected is from the 1960 Mullard transistor reference manual. The circuit is powered by a single 1.3 V battery and the transistors are germanium.
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...