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
ACCOMPANIES THE LIGHT
Light setup is very popular among young people. Scheme of another variant of this device suggested that the magazine "Radio, TV, electronics" (NRB). It consists of three color channels...
BAIKONUR MODELERS
In June 1990, Kiev stadium DOSAAF "the Seagull" for five days has become a kind of Baikonur. Here were the start of the eighth world championship on rocket and space models. Athletes...
