Motorola suggests this circuit in an 80's documentation. The circuit uses an inverter to produce a higher voltage for 9 V battery charge from a single cell.
The integrated circuit used is a double 741 from SGS. The transformer is the critical component of the...
This circuit was found in a 2002 documentation. The RF output power transistor must be mounted on a...
This is the circuit of a commercial flash from the 60’s. We found it in a march 1961 Radio...