Laboratory power supplies using linear technology feature separate LCD digital displays for voltage and current. Due to their high stability of output parameters, they are ideal for laboratories, workshops, and production. With a robust design and simple operation, these devices are continuously short-circuit proof and offer very good regulation behavior as well as low residual ripple. A 10-turn spiral potentiometer allows for precise adjustment of the output voltage. The devices can be operated either as constant voltage or constant current sources. The outputs of the dual voltage sources can be connected in series or parallel. Additionally, the devices are equipped with over-temperature protection and a presetting of the output data without load.