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 MiG-27
The MiG-27 with a laser sighting system "Kyra" based on fighter-bomber MiG-23БК. In contrast to the predecessor, the air intakes have become unregulated. The first flight took place in...
SOLARIUM FOR CUCUMBERS
The third year of the Soviet people are working on implementing the Food program of the USSR adopted the may (1982) CPSU Central Committee Plenum. And not only adults. A contribution to...
