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
A RELIABLE “BABY”
We offer mini tractor "baby-3" (the third model) was made by me in the calculation of the mechanized harvesting of hay. From here he and a sufficiently powerful power unit, and two...
NORTH AMERICAN FJ-4B FURY
The development of carrier-based jet fighter with the designation F1J firm North American beginning in the years of the Second world war. It was the car with straight low wing and front...
