Ultrasonic repellent 4011 (CB9385E)

This circuit was found in Radio Electronics from the 90s. The transducer is a tweeter and the power transistor must have a heatsink.

| Clique na imagem para ampliar |

Ground-Referenced Constant Current power Supply (CB25616E)
Unlike the previous circuit, this circuit from Electronics Now, October 1993, has the load...
Oscillator with voltage comparator (CB9050E)
For the component values used in thisf this circuit, the frequency can be adjusted between 740 Hz and...
Low Consumption Clinical Thermometer (CB14000E)
We found this circuit in the 1982 Selezione Radio magazine in Italy. The circuit uses an...