Power Supply 0 - 30V

Power supply built on veroboard using a LM350 regulator.

Veroboard layout drawn in veecad, colourised  with paint.net

veecad

Schematic drawn in Tinycad.

Schematic

Index.

JP            30v AC input

D1-D4     1N5408 (Bridge rectifier)

D5,D6      1N4148

D7,D8      1N5408

JLED        Connector for power on light (LED).

JVR          5K. Connector for variable resistor pot.

C1            3,300uF

C2,C3      10uF

R1            4K

R2            100

JA             Connector for AMP Meter

JO             Connector for  Vout

JV             Connector for VOLT Meter

Inside the box

Front View

Notes.

• Take careful note of the pins outs of the LM317/350 regulator. Don't confuse them with the pinouts of the 78XX regulators. Check the LM317/350 data sheets.
• Use a heat sink on the regulator. 
• Also use a 24V or 12v-12v transformer. The 30V transformer is RMS, 42V P2P,  and exceeds the input limit to the LM350 (40v)

 

Copy of veecad and tinycad files, click below.
Links to source files