HOW TO – Crystal controlled 1 pulse per second clock

Fig 3 Project 10202006
The latest Citizen Science has a how-to on making a pulse circuit from a clock, the completed circuit provides pulses with a duration of about 30 milliseconds… Allan writes – ” This easy to make circuit will provide pulses at a highly accurate rate of one per second (1 Hz). The circuit is based on a common quartz clock movement that seems to be in most of today’s wall clocks. A suitable movement can be salvaged from a clock or purchased new from a hobby shop. “Link.


  • Electronics projects @ MAKE – Link.
  • Society for Amateur Scientists. Citizen Scientist – Link.

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