The power supply is suitable for 5V logic circuits. This is a basic power supply in a box using two 7805 regulators. Input up to 20V AC from a transformer or power pack. Two regulated outputs are available - one fixed at 5V, the other variable. Good introduction to three terminal regulators.
Many power amplifiers require a dual DC power supply for their operation.
The kit is constructed on single-sided printed circuit board. The L200 regulator provides the facility for current and voltage limiting with very good regulation. The IC has internal current limiting and thermal protection. A maximum of 2 Amps can be passed and the maximum input voltage may not exceed 27 Volts. The maximum voltage is set by VR1 and the current limiting by R1.