This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an English documentation from 1967. The transistors are from the time.
November 2016 - Ohmite resistive current sensor chips with resistances from 10 mΩ to 100 mΩ in SMD...
In the figure we have a very low current DC to DC converter using a 555. The circuit can have...
This is a basic astable circuit using the 555 IC and driving two LEDs. The phase on a rate giving...