If the empty tube of toothpaste to fill the rear end with petroleum jelly or machine oil, and the tube to make a hole and feed it through the rod from a ball pen, as shown in the figure—get a convenient oil can to lubricate the parts in hard to reach places small mechanisms — such as alarm clocks or electric razors.
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THE LIGHT WILL ACTIVATE THE SIREN
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...
“VIRTULA” FOR ALL
Designing a new racing control line aeromodel, we opted not on some extravagant options, but the proven classic design, well established and fully proven to date. The base design was...
