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
DRILL WITH “SELF-SERVICE”
What home craftsman can do without an electric drill? With a set of simple attachments, it can perform a wide variety of material processing operations. But most often, the drill is, of...
POST-FLOWERBED
Three wide boards and five or six plastic buckets in the form of a segment of a cone which is enough to do practically occupying a square flower bed for climbing plants, the flower bed...
