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
AUTOROLLER — DWUHLOPASTNY CAR
Probably not be an exaggeration to assume that at least half of the permanent readers of the "Modeller-designer" wants to make their own car. In the following constructions as the power...
CUTS FRICTION
Many probably had to watch as the metal is heated during processing it on an emery wheel. The phenomenon is harmful: heating "releases" hardened metal. Is it possible to turn it to their...
