Air Model Finder


Posted on Aug 13, 2012

This simple circuit produces a loud trilling noise, if no valid transmitter signal is received. This frequency must correspond with the resonant frequency of the piezo element, otherwise the sound level will be very low.


Air Model Finder
Click here to download the full size of the above Circuit.

When you switch off the transmitter, the IC1, pin 5 provides a 2-KHz signal and pin 7 goes "high". If you use a buzzer with internal electronics producing the signal, R2 must be connected to pin 7 instead of pin 6.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Touch Switch illuminates LED
40MHz 32 Channel PC-Based Logic Analyser
Nokia 7610 MMC Corrupt Problem Picture Help
electronic circuit amplifier
pendulum controlled clock
Infrared Burglar Alarm Using Remote control PCB
AC Dimmer for Lamp 6.3V
13 GHz Frequency Counter Prescaler
One of the positive and negative brake circuit to operate energy



Top