Designing electronic devices on integrated circuits, radio Amateurs often use to display the information indicators IN gas-1 — IN-16. They usually feed from the mains AC voltage of 220 V or from a separate winding of the transformer. Consequently, the instrument is “tied” to the grid and they can not be used in the field.
The issue of autonomy will help solve the voltage Converter, which allows you to get from the power source +5 V DC voltage +200 V, sufficient power to connect the six indicators type IN-1. The basis of the Converter equals the multivibrator logic IC К155ЛА13 open collector and high load capacity. MS elements DD1.1, DD1.3 and DD1.2,DD1.4(see circuit diagram) connected in parallel to increase the output power of the Converter.