When working with electronics, you always need one basic thing; power. This power supply is great for powering all kinds of electronic projects. It produces a well filtered, variable 1.2-30 volts at 5 amps. It is easy to build and the parts are realitively easy to find.
Parts:
C1_____________14000uf or 10000uf 40 Vdc Electrolytic Capacitor
C2_____________100uf 50Vdc Electrolytic Capacitor
C3_____________.1uf Disc Capacitor
C4_____________.01uf Disc Capacitor
R1______________5k Pot
R2______________240 Ohm 1/4 W Resistor
U1______________LM338K 1.2 to 30 Volt 5 Amp Regulator
BR1_____________10 Amp 50 PIV Bridge Rectifier
T1______________24 V 5 Amp Transformer
S1______________SPST Toggle Switch
MISC___________Wire, Line Cord, Case, Binding Posts (for output)
1. The regulator comes in a TO-3 case and MUST be used with a LARGE heatsink. You may want to mount a small fan to blow air across the regulator (I did).
2. The filter capacitor is large. It won't fit on any board so bolt it to the case.
3. You can, of course, add a volt and amp meter.
4. Since this project operates from 120 VAC, you must include a fuse and build the project in a case.