Using a 709 integrated circuit this circuit was found in the June 1972 issue of Radio Electronics magazine. More modern operational equivalents can be used. The power supply is symmetrical.
Found in a 1960's Mullard transistor manual, this circuit has an input current of 4.4 A and an...
With the configuration shown in the figure, a common 12 V lamp lights up when light no longer...
This is the basic configuration of an operational amplifier as a current regulator. We found it in...