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
THE FIRST SOVIET LIMOUSINE
Luxury car ZIS-101. In the early 1930-ies in the Soviet Union there is an urgent need in an Executive car of a domestic production. The fact that pautinopodobnoj elite in the Soviet...
FROST IS NOT TERRIBLE
No-no and remind myself of the harsh winter the people of our Midland... And when the temperature falls below the normal are given to take additional measures to insulate the apartment....
