555 Pulse Width Generator (CB25959E)

This pulse width-tuned circuit was found in the March 1996 issue of Electronics Now magazine. The base frequency depends on R1 and C1.

50 kHz to 10 MHz Oscillator (CB25682E)
The frequency of this oscillator depends on the crystal used. The transistors are general purpose. We...
Capacitance Bridge (CB520E)
You can measure capacitances across a large range of values using the AC Power line frequency as...
Higher Current Voltage Variator LM3900 (CB5058E)
The circuit of the figure serves the same purpose as the previous one (CB5057E), but has a...