Electromechanicl analog digital clock
11 days ago | Blogs | by: Christian


The result: A steampunk-clock build with:
• one stepper driven by mains frequency to get a 1sec pulse
• digital counters (CD4040) for seconds, minutes and hours (of course with LEDs)
• digital-analog-converters (DAC0808) which drive the instruments to show the time.
(I also thought of building it with transistors... but I wanted to be finished with this project in this decade ;-)


Some thoughts

  • Build a steampunk like clock with big (old) moving-coil instruments, but not with the help of a microcontroller.
  • Clock source: Crystal? NE555? stepper!
  • Count secs, mins, hours: binary counters with reset CD4040.
  • Instruments: ebay-found two ELIMA 10V DC instruments.
  • Drive the instruments: analog-digital-converter DAC0808.
  • It should look really nice.


Next was designing the circuit boards. I designed 5 boards:

  1. Clock Source
  2. Seconds Counter
  3. Minutes Counter
  4. Hours counter
  5. Power source (=base plate)





11 days ago | Blogs | by: Christian











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