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 two-channel wired intercom was found in the April 1990 issue of Radio Electronics magazine....
The voltage of this symmetrical power supply depends on the regulating integrated circuits, which...
A staircase signal is produced by this circuit using a TTL IC and an operational amplifier. The...