/diy/ - Do It Yourself

>>800070
I made this adjustable PSU with two LM317 for the outputs and a laptop charger. Both outputs can go from 1.25 to 16 volts, an the maximum amperage is 1.5 or 2 amps in peaks, whie the 78xx can only output 1 amp.
I also must say the LM317 are heavy duty stuff, I've been abusing the LM317s by drawing more current, driving flybacks with discharges that have killed mosfets, transistors and regulators and doing all sorts of crazy things with it, and it still works.

If you want more than 1.5 amps then you can use an lm338 (5 amps) or use a lm317 in combination with a power tansistor (e.g 3055)

Here's my instructable about the PSU:
http://www.instructables.com/id/Fully-adjustable-double-output-power-supply/

>>799907
http://www.instructables.com/id/Fully-adjustable-double-output-power-supply/
A "knight rider" circuit will do, just connect another strip of LEDs to the already existent so they light up in opposite directions and stop at the center.