In the journal “modelist-Konstruktor” No. 10 for the year 1985 was published a description of the electronic disconnect switch (VMS) for the battery (AB) of the vehicle. The originality and simplicity of the scheme I liked. Of course, I used it on my car. And creatively. The result is a design which, unlike the prototype, allows you to successfully use e-VM even when the on-Board network contingencies of a short circuit. In addition, my design provides for the on indicator. But this added convenience.
The brake light is on every car. However, the day (and especially during Sunny weather), the light becomes less visible. My suggestion is to use for signaling braking and still the Parking lights (so much so that at dusk and at night, they automatically would go to work in the usual, regular mode). For this customization requires minimal intervention in the scheme of the onboard network of the car, and here is the result… In its high efficiency will make sure everyone who is brought to follow the car, stop signal, in which the day is highlighted by a “retrained diodes dimensions”.
Five years ago one of my friends purchased a garage with a cellar and worried about how and what to do to potatoes and other vegetables, planted for winter storage in the cellar, didn’t freeze? Remember, rescued his once-popular thermostat through a balanced bridge with the two thermistors. And recently another friend of mine, being in the same life situation, asked me to help him in the manufacture of such devices.
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).
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.
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.
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.
