It is often necessary to pour a certain amount of fluid in a pan or bucket. Not to do it “by eye”, rather on the inner surface of dishes used to put a measuring scale, calibrated in litres. Depending on the material of the vessel, the risks can be incised or applied the paint counter.
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THE FUSE IN THE AC CIRCUIT
Circuit of electronic fuse alternating current, represented in the figure, protects the circuit in which the output is regulated by the triac (or just the triac operates in the mode...
THE “GUARD” DOORS
The scheme is simple electronic guard device published the magazine "Funkamateur" (GDR). Across the doors of the protected object stretched thin wire. Until he is whole, the tension on...
