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 simple 3-channel passive mixer can be used with low-intensity signal sources but requires...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
July 2017 - Texas Instruments' new 3 A bq25601 single cell battery charger can be found on Mouser...