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This Power supply can charge batteries or just power things. It goes to 25V and 3.5 Amps. It is variable and has an indicator light

Step 1: Connectors

These are alligator clip connecting to the power Supply

Step 2: Parts and Components

Simple Layout

Step 3: Top

Top view

Step 4: Both

Step 5: Solder Points

Solder in this sequence

Wht s input voltage? pls attach circuit diagram
it is a simple PWM. Google "555 PWM" for schematics. however, this won't survive long under a load of the advertised 87 watts. you can give this ability, but you would need to use a FET for switching and add some cooling to it. the 555 would only act as control and not as switch.
What components did you use?
Give more details

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