This old circuit from the 80's generates logic signals with 50% active cycle (squares). The integrated circuit used is not common today, but equivalent logic functions can be used in a modern version.
Using a CA3130 and a power transistor, this circuit can deliver a current of up to 500 mA with the...
Rechargeable Nicad batteries type AA, C or D can be recharged with this circuit, which is nothing...
We found this circuit in a 1977 CMOS oscillators documentation. The power can be sourced with...