301 LED Analog Clock Project Schema Files of PCB and C51 Compiler Source Code has been prepared by the C-in hex. The clock circuit is made of 301 LEDs with a diameter of 3mm forming fi = dial (the most one LED is in the middle), and 12 LEDs Stroke hours.
The LEDs are arranged in seven zones. The three most outer rings comprise 60 LEDs each, and four inner circles each comprise 30 LEDs each. It was dictated by the size of the clock, which size is similar to the size of a CD, which shows the photograph above.
Just the size of the clock made the four inner circles not accommodate the full amount of 60 LEDs. However, I used a trick here: namely, control LEDs is done in such a way that the diodes in the inner circles light up alternately with the movement direction. The final result is more than satisfactory.
Analog LED Clock Project
Source: tobajer.w.interia.pl Analog LED Clock schematic pcb AT89C2051 source code files alternative link:
Password: 320volt.com
Published: 2008/11/08 Tags: avr project, led projects, microcontroller projects
PC Fan Panel Fan Speed Control ICL7107 Display LM35 Thermometer
Computer Fan Speed Control, Thermometer circuit ICL7107 driver display 7-segment display section based on the temperature sensors used LM35
Made with 3 LM317 datasheet fan speed control circuit may be used standards contained in the file is not a special one circuit. Half the CD-ROM used for boxing great convenience for installation on the computer chassis
PC Fan Panel Speed Control