The purpose of this circuit is to indicate which of the two cars crosses the finish line first on a slot car lane. The circuit is from an 80's Popular Electronics.
This amplifier, common in 1986, uses a hybrid integrated circuit that can offer some difficulty to obtain...
This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the...
Found in a radio amateur magazine of the 1980s, this circuit uses components that can still be...