Logic test with sound (CB25389E)

This circuit has visual and audible status indication using an oscillator. The circuit is from a Radio Electronics magazine from June 1991.

| Clique na imagem para ampliar |

Three Input Mixer (CB4999E)
This circuit was found in a Spanish magazine that no more existis, Mundo Electrónico, in a...
MCP1810 LDO with Ultra Low Quiescent Current (COM144E)
November 2016 - Mouser Electronics already has the new Microchip MCP1810 Low Dropout (LDO)...
Audio Level Controller (CB25551E)
We found this circuit in the Radio Electronics magazine of February 1993. The main integrated...