It is no secret that the halogen lamps used in cars, often fail. This is the result of inrush current, which inevitably occurs every time when enabled, when the spiral filament is still in the cold (cold) state.
THE LAMP WILL SERVE LONGER
Ham radio
THE MOTOR IN THE ROLE OF TESTER
Among the devices that are used to check (continuity) of electrical circuits, not take samples. They are simple in design and application. The probe is an indicator, in series with which is connected, as a rule, galvanic cell (battery), current-limiting resistance and two testers. Touching the probes on different portions of the circuit, checks the condition of all its parts and proper connections.
A SIMPLE “UNIVERSAL”
“Almost five years are a reader and subscriber of the journal “modelist-Konstruktor”. During this time, produced in any published developments in several homemade “for home, for family.” Would like to start welding-charging-starting device, a circuit diagram and description of which I had noticed in one of the rooms of the journal for this year, but deterred by the winding operation in the manufacture of powerful transformer, choke. And the installation of electronic control unit thyristors, I’m afraid not master. Whether it is at least a little to simplify the development of that interest me?”
WITH THE EFFECT OF “DISTORTION”
Amplifiers loved by many musical instrument — the electric guitar created a lot. Including the so-called effect of “distortion”, the essence of which is to limit the primary sine wave top and bottom, resulting in a large number of odd and even harmonics that give the sound of the solo guitar special melodiousness. About the original circuit solutions, allowing you to create in a home workshop good-quality amplifiers with the effect of “distortion”, repeatedly reported by its readers and “modelist-Konstruktor” (see, for example, No. 8’80, 2nd’88 magazine).
DISMANTLING THE SYRINGE!
Medical disposable syringes used for injections, thanks to the efforts of enthusiasts of technical creativity began to find further applications. For example, in Amateur practice, in particular during the dismantling of electronic components with printed circuit boards (especially in remote places where there is so often no “third hand”). However, the basic syringe has to be changed accordingly (modified).
GOOD TO BEEHIVE AND INCUBATOR
Applications I developed the thermostat is quite wide. It can be used, for example, to maintain the desired temperature in the vegetable stores, household incubators, in the hive. Combining simple designs with compact size and high efficiency design, this device differs from analogues of many well-known and even easy to use with built-in indicators on the LEDs.
HOME WIFI NETWORK FOR HD VIDEO
I recently made repairs in the apartment and decided to check if there is any chance at the current level of development of wireless equipment to create an apartment full of high-speed wireless network. Initially, the task seemed inappropriate (at home quite successfully, you can use Ethernet, why bother with WiFi?), but to convince myself that wireless technologies are not standing still, I decided to arrange a small test. One of the main criteria of success was the ability to view on a plasma panel HD-video rips with the volume from 10 to 30 GB in conditions when between file storage and replaying device is no wired network.
GAS LEAKAGE SENSOR
Explosions and fires resulting from gas leaks, unfortunately, are not uncommon. Recognizing the work of administrative bodies and emergency services, hams designers can do something yourself to minimize this danger. However, in the field of gas control is simple and accessible to a repetition of the device is almost there, or they are unnecessarily expensive.
There are industrial sensors, converts the gas concentration to voltage, current, resistance and other parameters. The ability to respond to changes in gas concentration have some oxides, especially the SnO2 — tin dioxide, doped various additives. On their basis it is possible to make an electronic device that responds to the excess concentration of a particular gas in air and emits sound signal.
“MICROCLIMATE” IN THE KITCHEN
To the store to buy a hood and install it in the kitchen is relatively simple — it requires only money, time and skills to screwed into the wall screws. But to diversify the inclusion of a drawing and automate it so that your hood has become to surprise the neighbors and, most importantly, to have added comfort in your kitchen — the case for the present enthusiastic radio Amateur.
Imagine sitting in the cozy kitchen, you no longer have to get up and turn on the switch on the extractor fan to ventilate the room (for example, if you or your guests stoned). Clap softly hit the table or say a sharp word with the volume more than usual, and wonder hood itself begins to work, and the kitchen immediately becomes cooler and more comfortable.
THE LIGHT IN THE KITCHEN
Use in the kitchen local lighting. As a rule our kitchens are covered the only light source is the ceiling or a chandelier hanging somewhere near the ceiling, in the middle.
Most often, this lamp General purpose lights no matter Desk — when the hostess is preparing lunch, she closes herself from the world of the working area on the plate.
Inconvenient such a lamp and in that case, when the family gathers at the dinner table (usually standing at the window or wall) — it illuminates not the table, and the center of the kitchen. In the end, for normal illumination of the working and dining tables in the chandelier have to screwing the lamp of high power, thus causing high power consumption.
