Ultrasonic remote control transmitter (CB8397E)

Found in a 90s Popular Electronics, this circuit excites a 40 kHz ultrasonic transducer. The transistor can be a BD135 or other medium power.

| Clique na imagem para ampliar |

Low Side Sensor LMV358A (CB19652E)
This application circuit for the Texas Instruments LMV358A was obtained from the component's own...
Automotive Timed Alarm (CB17476E)
This efficient car alarm circuit was found in a 1999 documentation, considering the...
Simple field strength meter (CB23668E)
The coils used depend on the frequency range that can be used with this device. We found it in a...