
Simply by touching the sensing element and actuates an electronic device that includes an alarm or actuator. The sensing element Ан1 — plated plate connected through a resistor R2 with a grid of thyratron MTX-90 (Fig. 1). The potential appearing ka the grid of the thyratron when you touch the plate, sets fire to it. The resulting circuit mtkh-90 pulses through the capacitor C2 is transferred to the SCR Q3 and the load (relay, lamp, siren, etc.). The circuit is powered directly from the mains alternating current. The capacitor C1 plays the role of damping resistor.
Advice
“WE NEED BOOTS HEM”
Any new boots at the beginning, on one foot, because they are made on the same block. And the first time they have to break in order to mold them left and right. But it will not do in this period to wear them without removing. A shot — easy to confuse then you. To Read more…
FIRST — FREEZE
Not so easy to drill a hole in laminated or foamed material. However, if he is able to absorb water — you can use a witty way, received in due time, even the copyright certificate. The trick is that the wetted workpiece of such material you need to pre-freeze. And so the frozen layer will Read more…
FRIEND FRAME
Learn? No, not the one who is smiling in the photograph, and the frame in which the picture is inserted? That’s right: this is the original application details from the old key switches. Its the plastic trim so gets a second life as miniature photo frames.
“PIN” — PRESS
In everyday life there is often a need either to press or to put under the press has to resort to some kind of charge weights. However, a kind of the universal pressure can be a spring-loaded “clothespin” from portable lamps. B. VOLODIN
THE MEDALLION OF HEALTH
Flu epidemic rolled on us with ominous frequency. Someone trying to protect themselves from the disease influenza vaccination, someone takes medications and vitamins that improve the immune system, but I recommend all readers to do for themselves and their children medallions, which will significantly reduce the risk of colds. They are based on a case Read more…
COIL EXTENSION CORD
Iron or drill you need in one corner of the room, and the socket is in another. In this case you can use an extension cord. And for storage you can make a simple and practical device — a coil provided not only for coiling the cord, but to include electric instruments.
TURN TO TURN
To make required urgently a small spring — not a problem, if there is at hand a suitable steel wire. You can just use a vise and a rod of any desired diameter. The last will only need to drill blind or through hole for entry of the wire end, with the subsequent winding of Read more…
HANGER FOR TOOLS
Any gardener or grower is usually a considerable Arsenal of all kinds of tool storage most often develops somewhere in the corner. Shown in figure wall hanger, made with his own hands from scrap materials, once and for all eliminates this problem.
SLED TANDEM
Children are always fun to play and have fun together. Give them the opportunity at the winter slope, linking together a couple of sleds. But if you have to attach to front bar as shown in the picture, sitting behind will, resting in his legs, to drive this sleigh train.










