We found this circuit in a Poptronics from 1998. The circuit can be extended to more competitors with another 4011. The power can be made with voltages from 6 to 12 V.
This fiber optic receiver was obtained from a 1978 documentation. We can use any modern...
This IR light sensor circuit was found in the July 1992 issue of Radio Electronics magazine. It is...
This simple oscillator with just one transistor has a frequency determined by the characteristics of the...