This circuit without sensors in series triggering an SCR was found in volume 5 of the 1995 Encyclopedia of Electronic Circuits. The circuit can have the number of sensors changed.
The circuit shown in the figure can serve as a basis for frequency meters, clocks. Stopwatches and many other...
This circuit is from an English book from the 1980s. Transistors can be general-purpose types of...
In this oscillator a phase shift network formed by C1, C2, C3 and R1, R3, R4 determine the fase...