Power supply for electronic circuit experiments need some special features. Ideally we need a precise, stable, reliable, and easy voltage adjustment power supply for working convenience. Being precise means that our power supply should give a voltage as close as possible to the desired value. A stable (low ripple) and very consistent (insensitive to operating time and ambient temperature drift) is probably what we define as stable. Reliable might mean that the power supply will keep working properly and safely although some failures happen its usage. Voltage adjustment should be provided to make it flexible for various circuit with various voltage requirements.

Features:
- Input voltage: 220V AC
- Output voltage range: 1.3V-30V DC
- Current limiter: 0.5-3.0A (programmable in 0.5A steps)

The hardware and software design details of this project reference are published in the external links.