This circuit, which generates a linear sawtooth signal, can be used in a frequency-band oscilloscope. The circuit was found in the December 1992 issue of Radio Electronics magazine.
The SCR used in this 80's circuit depends on the load. The control is half wave and instead of the neon...
Found in a 1965 Motorola documentation this circuit drives magnetic-type fuel pumps found in cars...
This circuit has a thermal chamber that acts as a stabilizer, compensating for the ambient...