In today’s electronic equipment is widely used touch control. Option sensor available for beginners repetition hams, offers Czech magazine “Amaterske Radio”. If you touch the plate, induced in the human body room electrical AC voltage increases two-stage ULF transistors V1, V2, and then straightens diode VЗ. Direct voltage of about 4 V, which appears at the sensor output, is the command signal.
The device used any low-power silicon transistors, for example, КТ342, KT315 with any alphabetic index. Diode any silicon (Д220, Д219). Capacitor — KBG-And or BMT. Touch plate — cut foil fiberglass with a size of 20X20 mm.
Recommend to read
“ITALIAN FOOTPRINT” AROUND THE WORLD
We have already seen how the Italian designers and consistently enough for the purpose to improve the quality of their light cruisers of the "condottieri". However, with all the...
THE HELM FOR THE REPAIRMAN
It's mind typically "ship" device is intended for other, ground targets, Kuibyshev innovator N. Gerasimov developed it to help those who are engaged in the repair of automobile engines. ...
