variable power supply 0-50 V/0-2 A

7-86 elektor july/august 1980 4700p Because of its internal reference source, the LM 10 is eminently suitable for use in power supplies. By using two ICs both the current and the voltage can be made variable. An added feature is short circuit protection. The output voltage is increased linearly by potentiometer P1, and the current (also linearly) by P3. The preset P2 is used to set the peak output current, up to a maximum of 2 A. The maximum output voltage can also be preset by a resistor connected in parallel with R1a. This method ensures better stability and less noise. D3 CO 92 variable power supply 0-50 V/0-2A IC2 LM 10 IC1 LM 10 +8 ** 6 Ali Rib BC 161 1N4148 The output voltage is stabilised in the following manner. The inverting input of ICI is connected to the output via R4 with the other input to the junction of P1/R2. The opamp will attempt to prevent any voltage difference by controlling T1. This will either increase or decrease the current through R6 which will consequen...