Quantity   Component name
1 × Enclosure deed big enough for this project
1 × Red indicator LED
1 × Green indicator LED
1 × Power rocker switch
1 × power supply (>12VDC) preferably mains supplied
1 × Fuse holder cos safety
1 × multi turn pot more turns the better for fine control
1 × Heatsink large enough to fit but big enough to dump some power
2 × Beefy Pass transistors 2n3055 or similar,
1 × IEC mains inlet want to disconnect and make it somewhat portable
1 × Display to show voltage of load and current
1 × switch to turn the load on/off
1 × A reference for the setpoint stable yet afforadable
1 × red 4mm binding post
1 × black 4mm binding post