
Look at ordinary lake that we water the flower beds or the beds in the dry season: its construction, once born, has not changed. But whether so it is perfect that does not require improvement? Of course not. Here is one of the possible upgrades. Typically, a sprinkler head is within the level of the upper handle. Of metal or rubber tubing to make the extension spacer and you instantly feel how much easier will work a “telescopic” lake: without much effort you can reach the opposite, COA the garden or greenhouse.
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The proposed German magazine "Funkamateur" light relay is activated when light falls on the photoresistor R1 (see diagram) — when this occurs, a loud siren sound. Transistors VT1, VT2...
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High summer in the polar Urals. Together with the chief of the survey party we were returning from the upper reaches of the river Secure. Breaking the latest on the slope Qurum, saw an...