This circuit is from 1999 documentation. However, it can still be easily assembled, as all components used are common. The sensors can have their quantity increased, being connected in parallel.
Emitt This crystal-controlled oscillator can generate signals from 100 kHz to over 30MHz. The...
This circuit was found in documentation from the 90s. The components used are not common today. The...
This circuit was obtained in the National Semiconductor Linear Applications Handbook of 1994. The...