This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps. The diodes can be general purpose or even 1N4002. The transformer is 6.3 V with 100 mA or more current.
This high gain small signal amplifier circuit was found in an old publication on transistors....
This circuit is powered by 1.5 V and has a long lifespan as it consumes only 320 uA. The circuit is...
This circuit aims to recover electrolytic capacitors by applying currents higher than normal for a...