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 is used to output communications receivers that use low-impedance headphones or...
Based on NXP 74HC logic, this circuit can be adapted for various uses. The circuit can also be...
We find this circuit in an old technical documentation. The circuit can be drawn up with other...