If you don’t like the sharp sound of your electric bell, put on his bell under the hammer of the vibrator piece of adhesive plaster. And make the sound more melodic by replacing the bell rolled into a spiral of thick steel wire from the chiming mechanism of the old wall clock.
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A RESISTOR IN THE LAMP
Do you have old dual variable resistor (e.g., type SP-P to the same flawed)? Do not rush to throw it away. It is, in fact, the ideal mounting site for homemade sconces, floor lamps,...
FROM “SPIDOLY” LAB!
Instruments based on the radio. Determination of the frequency of an unmodulated source, an external signal. With the help of measuring GS you can configure any radio transmitting and...
