BATTERY — 220!

Categories Himself an electrician

From the battery - 220!Nowadays there are cases of power failure. In such a situation, can save the emergency power supply. For example, from a car battery with a homemade voltage Converter 12/220 V. Saw: stock power is enough for several hours of modern television, the lighting of the lamp or other appliance with power up to 100 watts. The maximum current consumption from a battery does not exceed 11,5 A.

The electronic heart of the Converter is an oscillator assembled on the chip DD1. And frequency can, if necessary, to change the selection of the resistance R2.

 

Schematic diagram of the printed circuit Board, emergency power supply from a car battery

 

Schematic diagram of the printed circuit Board, emergency power supply from a car battery
 
Control parameters characterizing the work of the serviceable voltage at idle with vegetarianism battery (the readings were taken with a model of the ammeter and voltmeter VZ-57, commonly used to measure redeclarations value of AC voltage of arbitrary shape)
 
Control parameters
 
Produced by the generator pulses are applied to the chip DD2, which is a counter modulo 10 to the decoder. Conclusions 2, 4. 7, 10, and 5, 6, 9, 11 are connected through the diodes VD1 — VD4 and VD5 — VD8 with a pass the two outputs to obtain vremenska gap that excludes simultaneous presence of the transistors VT1, VT2 (and below: VT3 — VT6) in the open state and increasing the efficiency and reliability of the Converter, but multiple step-down output voltage (approximately 20 V).
 
Schematic diagram of the printed circuit Board, emergency power supply from a car battery
 
 
If necessary, the time gap can be eliminated by installing two diodes VD1. Appropriate places for their installation on the printed circuit Board is provided.

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