This sophisticated workbench power source was found in 90s Radio Electronics. The maximum current is 15 A and the voltage can go to 37 or 42 V output.
We found this circuit in an American documentation from the 60's. The transistors are made of...
The accuracy of this circuit depends on adjustments made with capacitors of small tolerances of known...
The figure shows how to implement an OR function with two inputs, using a relay. The relay...