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--- en:projects:nixie-clock:start [2011/02/09 11:27] – created alex
+++ en:projects:nixie-clock:start [2011/06/04 09:11] (current) – [Specifications] alex
@@ Line 1: / Line 1: @@
 ====== Nixie Clock ======
-工事中
+{{:nixieclock-1.jpg?380|Nixie Clock}}
+===== 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