This simple charger was found in a 1980s documentation. The transistor may be the TIP42 with a heat sink. R1 adjusts the load current. The transformer has 1 A of secondary current.
This circuit, unlike the previous one (CIR12983) has the values of the components. The operational admits...
This circuit, with the assembly in a contact matrix, was found in a publication from the 90s. The...
This 800 Hz sinusoidal oscillator was found in a 1970s American documentation. The transistor...