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.
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MAGNETIC FINGER…
I think many who have to work with small metal objects. will be useful to my "magnetic" finger, or rather — rubber fingerstall to which is glued a small square of a permanent magnet.
THE PAN — SPOUT
Good aluminum pot is lightweight, inexpensive, milk by boiling in it does not burn. Only trouble is: pour out a small portion of it - a problem that will definitely spill if the edge has...
