The device is useful for a model fire truck and a guard system. The intervals between the signals and their duration is controlled by changing values of electrolytic capacitors C1, C3, fixed resistors R2, R4 (see diagram). Sound effects you can Supplement the indicator light, replacing the resistor R3 with a bulb from a pocket lantern 2,5ВХ0,1A. Output transformer and speaker from any small-sized transistor radio.
Recommend to read
BUGGY RACING WITHOUT ROADS
Every Sunday the gates are opened to the sports section "Buggy ERMZ". To the factory yard with the characteristic of motorcycle engines crack go dirt buggy. Today exercise. Guys this day...
SNOWMOBILE: IDEAS AND DESIGNS
(The end. Beginning at No. 2, 1975) Teacher Stanislav I. Pozdnyakov from the city of Berezina in the Minsk region, has been building snowmobiles for almost 10 years. He set himself...
