3/10/2024 0 Comments Nixie tube smallestThe design and assembly of the power supply is very sensible, so the components must be chosen and assembled carefully. The built-in variable high efficiency power supply was designed with the MAX1771 DC-DC controller, allowing output voltages from 150 to 220V DC without modifications. Supported by a logic level shifter and a 5 to 12V charge pump controller (designed for flash memory programming! Awesome!) the provide 64 digital sink outputs that can be connected with up to 220V! The board has small low-profile connector for SPI (to connect GPS or anything else to it) and a built in USB-to-UART FT232 chip, which adds direct USB connectivity to the board.įor the cathode driving two HV5122 IC's are used, because they perfectly fit the requirements. Supported by a ultra-precise battery backed RealTimeClock (RTC) and an EEPROM it can take care of all program operations and storage space a clock needs. With 20 general purpose I/O Pins and running at 16 MHz, it can provide all power and connectivity that is needed. The board contains all necessary parts for a nixe clock: Input power regulation, microprocessor, RTC and EEPROM, high voltage drivers, high voltage power supply, control elements and connectors.įor the microcontroller an AtMega328 was chosen, because it can be used with the common Arduino IDE, is widely available and well-priced.
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