The circuit in the figure uses two operational amplifiers: an LM101A and an LM102. Diodes admit equivalents and resistors do not have to be accurate. The power supply must be symmetrical.
We found this circuit in a 1998 publication. It drives an incandescent lamp for a time that...
This simple current control setup was found in documentation from the 60's. The low current...
This circuit appeared in Radio Elecronics magazine in 1968. The operating circuit is a...