DIY Dual Rail Variable DC Power Supply Soldering Kit (Intermediate Level) Single Range: 3V to 32V, Dual Range: +/- 1.5V to +/- 16VIntermediate level soldering kit can be useful as a power source for many electronic circuits Wide power supply range Single supply: 3V to 32V, Dual supplies: + 1. 5V to + 16V Two independent, high gain internally frequency op amps Positive and negative variable dc power supply, Two adjustable potentiometers Input and output terminal blocks, On off switch This intermediate level soldering kit can be useful as a power source for many electronic