This circuit was obtained in an Electronics World of 1968. The operational amplifiers ones are types of the time, no longer used today. The circuit responds from less than 20 Hz.
Taking advantage of the high input impedance of the operational amplifier 741 and its high gain we...
In the figure we have the basic configuration of a regulator for 12 V x 1 A suggested by Motorola in...
This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their...