Device delay off light in the room

Device delay off light in the room
02.07.2015 | Lighting
Sometimes you want light in the room was burning for some time after switched off by the switch. During this...

Compact three-element antenna

Compact three-element antenna
23.03.2015 | Shortwave antenna
Two U.S. Amateurs Myers (W1FBY) and Regrow (WA1LNQ) developed a compact three-element antenna for the range of 20 m. a...

Automatic shutdown of radio equipment

Automatic shutdown of radio equipment
19.04.2015 | Clocks, timers, relays, load switches
This device (Fig.1) automatically disconnects the load (player, CD player, amplifier, etc.) at the end of the phonogram or CD-ROM...

Kwarciany transmitter 433 MHz 10 mW

Kwarciany transmitter 433 MHz 10 mW
12.07.2015 | Wireless microphones
The signal from the microphone WM, amplified by the transistor VT1, through the resistor R4 is applied to the varicap...

Cathodic corrosion protection

Cathodic corrosion protection
06.04.2015 | Electronic devices
Many motorists know that it is enough to see a small scratch - and rust begins to engulf the car.

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