This circuit was found in the November 1966 issue of Electronics Now magazine. It uses an LDR as a sensor and has a Bargraph scale with the well-known LM3914.
This circuit was found in the November 1993 issue of Electronics Now magazine. It uses...
This circuit was found in a Popular Electronics from the 90s. The effect circuit uses components...
In the circuit shown in the figure, when the input voltage rises to 27 V, the TL431 triggers the...