Free Flight - F1A
Website by Michal Dvořák.
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Electronics
Electronic Timers
Timer T1
Timer T10
Setuper 2
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Acustic Beacon
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Acoustic Beacon (Buzzer)

The acoustic beacon is intended to help with model tracking. The laud beeping is very useful especially in high vegetation fields like corn or sunflower. If you don't have any radio beacon, you must have some buzzer at least. The usage with radio beacon is also recommended. My electronic timers have embedded buzzer, so this device is intended for stand alone operation (models with mechanical timer).

It consists from piezo buzzer and from small circuit that produces beeping pulses. The period is about 5 sec and the pulse length is about 0.5 sec. The beeping circuit includes CMOS version of the Timer 555, so the current consumption is insignificant between pulses.

Buzzer.jpg

General Features

  • Based on CMOS version of the Timer 555.
  • Supply voltage from 3 V to 16 V. 12 V alkaline battery is recommended.
  • Reverse polarity protection diode.
Img
Detail of beeping circuit board.
Img
12 V alkaline battery from GP.


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Last update: 17-11-2009.