This sophisticated moving bar indicator circuit with the LM3915 is from a Radio Electronics magazine from May 1985. The two-channel circuit includes the power supply.
This frequency modulated light transmitter is from a 1990s documentation. The circuit may use...
This type of configuration, which appears elsewhere in this section, was found in a 1965...
This circuit is from an Argentine publication from the 1970s but can still be assembled with...