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
GAZEBO IN THE GARDEN
In a quiet corner of the garden of his manor house planted Douglas fir. Three years have passed. The tree grew, grew. And then came the idea to build a small gazebo that over time, the...
TOYOTA RAV4
Appearance and many of the technical characteristics of the SUV, created basically to overcome the terrain, are already present today in the prestigious universal car that perfectly...
