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.
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When connecting such a power source as an ordinary galvanic battery for flashlight, not so easy to achieve a reliable attachment of wires to flat pin made of thin sheet metal. Moreover, this procedure will have to be repeated when replacing a spent power cell. To simplify the operation and improve the contact will be Read more…
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.
“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?”
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).
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.
Circuit of electronic fuse alternating current, represented in the figure, protects the circuit in which the output is regulated by the triac (or just the triac operates in the mode “connect – disconnect”) by removal of the control signals when current exceeding the specified value (emergency operation).
Before proceeding to describe the proposed design should make an important note. Developed contactless control can be applied not only in computer technology. Described constructive design and purpose of the device is just one example of its possible applications.
Restraint solder radiodetal tweezers also serves as a heat sink. With the same purpose and possibly the use of clamp type “crocodile”, if it is put on the output of the semiconductor
Device for automatically switching-off the lights in the bathroom (dressing) room are designed to seamlessly allow the following situations: