Direction Signal (CB25608E)

This circuit was found in the September 1993 Electronics Now magazine. It is based on the 555 and powers an audible indicator.

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High impedance tone control (CB20807E)
This high input impedance tone control circuit was found in American documentation from the 1980s....
Texas Instruments MSP-EXP432P401R LaunchPad Development Kit
Texas Instruments MSP-EXP432P401R LaunchPad Development Kit enables you to develop...
Measuring RPM using the Multimeter (CB26199E)
This circuit for old cars with mechanical ignition control was found in the 1983 Electronics...