This small regulator with transistors can supply 75 mA currents for charging NiCad rechargeable batteries. The circuit is from the 90s, using components from that time.
The integrated circuit used in this project is not common today, but it can be implemented with more...
Found in an American publication from 1969, this circuit can be adapted to be used as a shield....
This current meter with many scales was found in a 80s American documentation. The operational amplifier...