This scheme will be useful for those who grow in the aquarium ornamental fish. As you know, aquarium Pets should be illuminated most of the day. Industry produces automatic timers, lighting for aquariums and air compressors (pumps) that operate according to a given algorithm. The proposed device, checked by the author, is able to replace industrial automation.
Multifunctional device consisting of copier, printer and scanner (hereinafter, MFP), it is useful not only for home or office desktop. In practice, there are times when a copier, printer or scanner is required to literally “here and now”. For example, they are often necessary for a “hike” in state institutions. The device is so popular in modern life, when visits to bureaucratic offices require copies of the documents becomes irreplaceable. It can be used to scan the same documents and prepare them for sending via e-mail.
In practice, the repair of radio equipment and the creation of amateur radio designs are cases when it is necessary to highlight the portion of the circuit Board (PCB) to pay an additional light source, which is convenient to fix the lamp on the handpiece housing. In this light source should be small, and its direction of flow in the soldering tip.
There is a whole class of electronic devices that operate in standby mode, “waking up” only for a short time to perform their tasks, such as apartment bell, simple security system, automatic watering installation, houseplants and some other such devices in order to save electricity, it is desirable decrease in voltage when they are “resting.”
often need Amateurs with a passion for designing low-frequency amplifiers. But in the sale they are not always. The solution? To make a simple potentiometer with taps. For this it is necessary to remove the cover and remove the axle with the slider. Then with an awl to puncture the plastic covering the hole in Read more…
In recent years, and became noticeable interference in a household outlet, requiring protection home electronic equipment TVs, home audio, computers. These impairments lead to “tearing” of the image on the screens, heard the clicks and POPs from the speakers, “sboyat” digital devices. It is especially annoying when this happens while recording any programs.
If during the day to measure the mains voltage, the voltmeter each time will be different. This is due to you can enable or disable individual power consumers, changing mode of operation (in accordance with the work schedule of production, process flow, etc.), that is, change the values of loads that cause instability of voltage in the networks.
The proposed device is designed for “soft” on various radio and electrical household AC voltage of 220 V it is Known that the moment of switching devices containing a primary or secondary power circuits the capacitors of large capacity (high power audio amplifiers, switching power supplies and other devices), accompanied by a cast of current, which can reach tens of amperes.
Designed and made by me lighting device externally, and by construction, some nodes resembles the flashing beacons of special machines. But the purpose of it almost the opposite — creating a smooth bright light, and at low power lamps — at a considerable distance. Well, since the scope of the devices are different and their structures are substantial, but rather fundamental differences.
Remember, what is the simplest electrical circuit? The galvanic battery and light bulb connected by conductors through the switch (see the article “Ohm’s law” in the “M-K” N2 9, 1978). If such a circuit connection line length of about 30 cm to bring a compass, its magnetic needle will tend to become perpendicular to the conductor (Fig. 1).