Friday, July 22, 2011
This is my own diy clock, it's a plan how to build it up. If you have any questions, ask me, maybe I can help. The clock build up in 3 main sections, the 1 hertz source, the number motors, and the 4073 ic-s. It use for restart 10 seconds, and 10 minutes if they reach 6. If the clock reached 24 hour, it must be also restart. With 2 integrated circuit you can generate correct 1 herzt sign. The 4060 make 2 hertz with the oscillating circuit, and the 4013 flipflop divide it with 2. And here you get the one hertz sign. Here is the schematic, as you can see. For display numbers, the circuit use 4026. When it get an input, the number which show, will change 1 higher. And when it reach 10, send an input for the next 4026. So the clock count the 1 hertz signs from the oscillator. You must set the correct time, so the circuit have 2 buttons, one for minutes, and one for hours. If you push down set minutes, you send a 2 hertz signal from 4060 to minutes display 4026. The power supply is 5 volt, made with 7805 voltage regulator.
http://www.youtube.com/watch?v=SpUf5FIYv0w&hl=en
