This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
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...