Himself an electrician

The durability of even the most modern electronic devices (EEW) is inferior to semiconductor counterparts. In most cases this is due to the emissivity of the cathode. The matter is further complicated by the fact that the diagnostic tool (commercially available instruments for measurement and control of emission current) is, unfortunately, very expensive, difficult to operate, as they contain a “naughty” anode and grid rectifiers, which are designed to create to check the lamp mode is close to the working. The received data are plotted, calculated certain characteristics, and by means of which required parameters.

A commercially available power supply units are Chinese — made adapters have several advantages: they have an attractive modern design; dimensions distinguished by compactness; the scheme includes step adjustment of the output voltage based on the “razgovornoy” load; it is also important that there are acceptable for many price. However, they are not without, unfortunately, and specific disadvantage: during operation, they are “kicking”. Annoying piercing buzz with twice the mains frequency, particularly when using paired with a player or radio.

Electronic games with liquid crystals (especially “Nu, pogodi”) children love and appreciate. The disappearance of the “multisignal” a pair of WOLF-HARE “pocket” of the screen is perceived yet children sometimes worse than all misery. And who, if not us, adults (and even more so — consider themselves Amateurs with experience), not to please the younger generation quickly repaired electronic game.

To connect to network various electrical household appliances, machines in homes and apartments provided for the outlet. In the utility premises, outhouses and household buildings when posting back lighting outlet usually do not put. And this from the point of view of electrical and fire safety, in General, that’s right — there for them no supervision, there can be high humidity, etc., etc..

As you know, galvanic elements, batteries, accumulators and many generators do not have high-efficient, fast trigger protection against short circuits (a short circuit). No its in most sources of the secondary power supply Fuse the fuse, there is not in the bill. First, because the response time, is often absolutely not suitable for modern equipment, instantly reacting to abnormal situations. Second, fuses are one-time protection devices, requiring replacement by a new after his burnout, not everywhere and not always acceptable.

There are electric circuits of high voltage sources for aeroionizatora, which are collected on the basis of the automotive ignition coil. They are all quite simple and easily repeatable. However, the cost of the ignition coil is very high.

Currently, it has become fashionable household electrical lamps with shades. The publication describes this decoration to the lamp, which is easy to do it yourself from simple materials.

The era of universal shortage has prompted us to create the things in the shops it was impossible to find. However, the era of abundance has not stopped this process. Apparently, a modest domestic work is now subject to other laws dictated by market prices or a passion.

There are situations when the lighting is required to manage not one, but two places. For example, when you need to turn on the light when entering in a number of areas on and off when you exit from the common hallway. The situation is similar in terms of covered walkway, tunnel, greenhouses or the like of the long room.