In refrigerators with mechanical regulator temperature measured on the evaporator. It happens that the evaporator becomes covered with frost, and the thermostat begins to operate with an error, making failures in work of all lagoapraia. To combat this unwanted phenomenon (including — with the advent of frost) refrigerator has to periodically disable. In some designs there is a semi-automatic defrost mode, which the system is embedded a heating element with the corresponding button.
COLD CONTROL IC
The soldering iron is any homebrew. But those who have to deal with modern electro – and radio equipment, this tool is something special. And the requirements for it are quite hard: with small size, low supply voltage and low power consumption to ensure the excellent quality of soldering. And with the maximum comfort, including temperature controller soldering tip and a stand with a tray under flux solder and tinning.
Buying a player up to accommodate for his food during his frequent touring on-Board generator. As the adapter decided to use a homemade solid state rectifier. The implementation of the ideas started by selecting a circuit diagram of the valve half-wave diode with a smoothing capacitor. Soon he was convinced regular Wellenreiter power 3-5,4 W and an output voltage of 6-7 V and the modified on-Board power grid using a rectifier for key any diode average power and capacitor µf 500-2200 quite cope with the new task. In the end, the player was to receive a 3-volt power supply when the Bicycle is moving at a speed exceeding 10 km/h with the included headlight and not less than 8 km/h is de-energized.
Among the variety of flashing Christmas lights increasingly popular get the “ultra simple”, consisting… only of the LEDs. Instead of the usual piles of circuit design (with electronic keys, which are intermittently open-closed low-frequency RC, RL or LC oscillators) here compact semiconductor light emitter. However, the LEDs acting as a kind of microswitches, not simple (Fig. 1A—1 b). The name of this class of optoelectronic devices, developed at the junction of integrated microelectronics and optics — Blinking LED lamps (flashing LEDs, or MSV).
Hoping to equip the apartment “talking” for hours, tried to collect an acceptable design using standard domestic circuits. But once faced with the complexities of the “firmware” electronic memory, decided as the basis for its hours to accommodate wrist alarm TALKING WATCH — cheap consumer goods from China. The result was an information system capable of interesting, in my opinion, and many readers of the journal “modelist-Konstruktor”.
