Want to improve your capital on the lamp. Say equip it with a dimmer glow (which is especially important when watching television), and compactly built-in outlet, resulting in the lighting device have an additional opportunity to serve as a kind of extension! Then feel free to tackle The more scarce parts and assemblies necessary. As, however, and a solid knowledge-experience in the field of electrical and radio engineering.
Do you think what is common between math and electronics? Readers familiar with digital technology, recall that the mathematical laws of Boolean algebra the basis for the action of logic circuits. But that’s not all. It turns out that in mathematics, and electronics often use this concept as a comparison. But if you have to compare them with other numeric values, in electronics there is a comparison of the electrical signals. To perform such operations even created special devices — Comparators.
After reading No. 1 “M-K” for the year 1989 description electronic switch-off “weight” of the car, decided to use it as a simple anti-theft tool. However, the replacement of toggle on the button (as advised by the project author V. Arapov) or reed switch occurs very undesirable moment when the voltage produced by the generator will be equal to the battery voltage, the transistor closes. And in the future on-Board vehicle network will be powered by only one generator. And as for fuel economy the engine is regulated to the minimum idling speed, the voltage generated by the generator in this mode, will be low. Therefore, at the moment of starting off (as in a “weak” generator, and when the light is turned on) the engine may stall. But the main danger occurs when emergency braking, as when the engine stops, the on-Board system is de-energized and the brake lights do not burn!
Fast and simple — to manufacture heat sinks for transistors and microcircuits made of copper or aluminum foil with a thickness of 0.1—0.3 mm. Plates are cut with scissors, carefully collected in a package with a thickness of 3 mm, clamped between two fairly tough boards and drill holes. Prior to Assembly of the plate trimmed in the area of thermal contact and smooth out the micron sandpaper to ensure their tight fit. And after the plates are assembled, their ends are bred throughout the free zone.
As a stand-alone power source flash FIL-46 I use a voltage Converter PN-70, manufactured by Kharkiv enterprises “ECHO”. In the process of operation of this device revealed its drawback: after charging the storage capacitor and ignition indicator lights, signaling willingness to work consumed by the inverter current decreases from 1.5 A to About 1 A, that is, the batteries are not disabled and continue to discharge. This leads to rapid failure. To stop the discharge of the batteries is possible by disabling the flash from the unit manually by taking out the plug from the socket or set forth in the chain of socket switch. However, both methods are inconvenient due to the fact that distract from the shooting.
In the December issue of “M-K” for 1990 were published material about the switch-gubbare. There is proposed a technical solution I liked, but… think about it, has developed its own version. In order to turn on the light of the two points, sometimes enough to modify the normal switch. It is necessary to disassemble and install a third contact plate. This is done quite simply.
Honeybees live on the Earth for over 10 million years. And of course, tried to adapt to the environment in the wild but not at home… From hibernation they often go weak, susceptible to infectious diseases. And even whole families die. Although, it seems, and here nametype has, as they say, your height. Beekeeper-inventor and long-time subscriber “M-K” S. Kalashnikov developed an original method allowing the bees to facilitate the winter, they create a truly comfortable environment with the use of additional (electric) heating of hives.
Many plants, like tomatoes, during its growth and fruiting require a lot of moisture, so they often have to be watered, especially in hot season. The proposed machine will help you save valuable time and eliminate the need to be constantly “tethered” to their Pets. Just turn on the power and set the clock correct time of watering. The device is simple to manufacture, and at the same time it is reliable in operation.
My burner — ejector for high temperature soldering. Running from the LPG cylinder. It is economical: the number supplied to the gas ejector can be adjusted. The burner is arranged in the following way. From the gearbox or gate valve on the cylinder gas is fed through the hose to the inlet tube built into the base of the burner. From there it flows through the vertical channel of the rack in the Central bore of the body of the jet, where the amount dosed adjusting needle mounted on the threads of the housing cover. Further, the gas supplied to the nozzle and ejected through the hole.
