Found in an Electronic Design from 1968 this circuit generates a linear sawtooth signal modulated by an input signal. The transistors are from the era.
This is yet another simple LED driving game circuit that appears in several other versions on this site....
We found this circuit in a manual of optoelectronics from Texas Instruments. In it photodiodes or...
This interesting circuit is from a 1988 documentation. It is a matrix of diodes that converts...