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
ELECTROSHOCK
Sometimes the house master when performing any repair or maintenance work is to explore the dark, and even hard-to-reach place that will not push a normal portable lamp. In this case,...
RINGS? HOW MUCH YOU WANT!
Recently become popular to seal packing rope bandages, and rubber bands — quickly and conveniently. But where to get them, and even of different diameter? There is nothing easier. Cut...
