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en:projects:nixie-clock:start [2011/02/11 04:39]
alex
en:projects:nixie-clock:start [2011/06/04 11:11] (current)
alex [Specifications]
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 ====== Nixie Clock ====== ====== Nixie Clock ======
  
-{{:​nixieclock-1.jpg?​600&​direct|}}+{{:​nixieclock-1.jpg?​380|Nixie Clock}}
  
-I designed and built this nixie tube clock in my senior year of high school.+===== Introduction ===== 
 + 
 +I designed and built this basic 4 tube nixie clock in my senior year of high school. ​  
 + 
 +For more a detailed introduction,​ please read the [[history]] page. 
 + 
 +===== Detailed Information ===== 
 + 
 +  * [[History]] 
 +  * [[Power supply]] 
 + 
 +===== Specifications ===== 
 + 
 +  * Display 
 +    * 4x ИН-16 (IN-16) Nixie tubes 
 +    * 208V anode bias 
 +    * 1x К155ИД1 (K155ID1) high voltage BCD to decimal decoder/​nixie tube driver (74141 equivalent) 
 +  * Processor 
 +    * Microchip PIC18F2550-I/​SO 
 +    * 20 MHz clock, 5 MIPS 
 +    * 32K Flash 
 +    * 2K RAM 
 +    * 10x 10-bit ADC 
 +    * I²C, SPI, and EUSART peripherals 
 +  * Clock 
 +    * Maxim/​Dallas DS1340C 
 +    * I²C Interface 
 +    * Built-in crystal 
 +    * Backup battery support 
 +  * Power Supply 
 +    * Input: 12V DC 
 +    * Output: 5V DC 
 +    * 7805 regulator 
 +  * High Voltage Power Supply 
 +    * Input: 12V DC 
 +    * Output: 12V - 300V DC variable 
 +    * Boost topology 
 +    * IRF720 400V 3.3A N-channel MOSFET 
 +    * HER105 400V 1A fast recovery rectifier 
 +    * 4.7µH Inductor