A versatile microprocessor power supply unit for vertical and horizontal gel electrophoresis. Programmable power supply has the following features:

• Light weight, compact, and stackable unit.
• The unit is capable of producing up to 250 volts, 400mA and 100 watts.
• Designed to operate at a constant voltage or constant current.
• The unit is capable of programming up to 10 methods.
• The power supply unit is provided with the option to set audio-alarm at the end of a program.
• Safety features include shrouded plugs and sockets, no load detect, and leaking detect.
• Accepts both 110 to 240 volts power in-put sources.