I need a schematic for a 2N3055 variable current power supply using a full wave rectifier and a 24V (filament transformer from Radio Shack), the cuircut lets the voltage float and regulates the current. A pot is used to vary the current output. I use an ammeter to set the current. Current runs about 200 milliampers to maybe 1.5 Amps. I use it to charge NiCd batteries. It also has a LED in the circuit and a diode. I intend to substitue and TIP3055 vice the 2N3055. I have seen tons of schematics using voltage regulators to control the battery charging rate. I am not so sure about using that as it allows unregulated full current to flow until battery voltage is obtained. The current regulating circuit is better as I charge at lower rates for longer times. And since the voltage floats, I can charge up to ten or more cells at one time.
I have lost the original schematic and have had a problem. I suspect the 2N3055 has been blown.
Advise please.
I have lost the original schematic and have had a problem. I suspect the 2N3055 has been blown.
Advise please.
Last edited: