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
“TROIKI” TO “THREE”
Car Golf-class AUDI A3 production in 2003. Not so long ago in the journal "modelist-Konstruktor" was published an article about a German firm Audi and one of the most interesting cars —...
THE TAIL BOOM OF THE FUSELAGE
The fuselage of modern rezinomotornaya model aircraft usually consists of two parts: the power (it houses the rubber motor, is attached to the lug screw, wing) and the tail boom carrying...
