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
AND LASER AND PLOW
— Go to Nizhneudinsk — said to me in the Irkutsk regional Committee of the Komsomol. — Where the station Director is an enthusiast of invention, teaches kids to experiment. We hold...
MICRODRILL OF THE COMPASS
Often, while working on a model of a ship, I have to drill holes with a diameter less than one millimeter. To this end I have produced a handy drill machine. Maybe someone wants to make...
