The circuit shown is from the National Semiconductor Linear Applications Handbook of 1994. using ADC0808. The circuit can handle data from up to 4 transducers with an 8-bit output.
This simple oscillator with just one transistor has a frequency determined by the characteristics of the...
We found this circuit in the January 1979 issue of Radio Electronics magazine. Components are...
Found in a 90’s Radio Electronics magazine, this circuit uses a component from the time, difficult...