Advice

LIGHT TELEGRAPH

24.07.201812.05.2018Tips readers

Someone who knows Morse code or just going to study it, can build a simple device, shown in the figure. On a plywood Board install the battery B and the lamp L of the flashlight. Contactor In the manufacture of contact plate faulty relay. Now connect the parts to each other by wires. To increase Read more…

THERMOSTAT

24.07.201812.05.2018Tips readers

This device is not very complicated and consists of the heating element, the mercury column and the solenoid. When the current is switched on starts to operate the heater — closed working contacts of the relay. When it starts to heat up the mercury, and the column rises to the level of the contact turns Read more…

ACCURATE PLANER

24.07.201812.05.2018Tips readers

Manufacturing of hollow beams to collect the glider, I was faced with the need to have a thin, uniform thickness or width of the slats. We had a little bit to improve the conventional wooden plane (see Fig.). Drilled in it two holes, I inserted the stud with nuts and washers. On the studs put Read more…

ELECTRIC SAW

24.07.201812.05.2018Tips readers

This simple saw can be processed plywood, thin wooden boards, etc. On the basis of the size of 250X150 mm are mounted the following parts: 1 — the solenoid of the screw Ø10 mm, which is wound with insulated copper wire 0.2 mm (the more turns, the greater the power of the magnet); 2 — Read more…

INVENT A STROLLER!

24.07.201812.05.2018Tips readers

I think that it interests not only me, but many who because of injury, illness. or accident has lost the ability to move independently. Great care of us, the disabled, shows the state. A got a good apartment. All would be nothing if… not the stairs. For those who can’t walk or hardly move, stairs are an insurmountable obstacle.

RELAY “TOUCH”

24.07.201812.05.2018Tips readers

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.

“WE NEED BOOTS HEM”

24.07.201812.05.2018Good recommendations

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

24.07.201812.05.2018Good recommendations

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

24.07.201812.05.2018Good recommendations

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

24.07.201812.05.2018Good recommendations

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