LOUD BIKE SIREN


Posted on Feb 7, 2014

Uses 5558 dual opamp and four general-purpose NPN transistors to generate triangle wave that can be distorted by 10k symmetry control to give either fast or slow rise for sawtooth applied as base bias to astable MVBR Q1-Q2. Drain is reasonably low with 9-V radio battery, Repetition rate can be varied from long wail to rapid warble, and volume changed from soft to annoying.


LOUD BIKE SIREN
Click here to download the full size of the above Circuit.

Article gives construction details, and recommends use of removable mounting on bike to avoid theft.-R. Megirian, Simple Electronic Siren, 73 Magazine, Oct.1977.p176-177.





Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Robot Trains in the Garden motor control circuit
200m fm transmitter simple circuit
Deluxe Charge Rate Limiter for Small Capacity NiCad Batteries
Spice and the art of preamplifier design
thyristor
Frequency counter Logic schematic
PIC-based circuit example from Westford MicroSystems repeater for GPS data and battery voltage monitor
Programmers in circuit serial programming
Broadband high frequency amplifying circuit



Top