![]() ![]() To note is that I changed the polarity of the clock supply to be able to use a NPN darlington transistor.Īnother beauty of this simple circuit is that it is perfect to be used for synchronising another pendulum clock(s). The circled numbers in the attached circuit refer to the top connectors of the GPO master clock. The circuit is very compact in use and can easily be fitted in the clock housing. It doesn’t matter if the clock pulse is shorter than ½ second or bounces twice when the pendulum pushes the ratchet through the 30 seconds lower cog of the count wheel. I decided to build this circuit after my Gents GPO 36 master clock started having the odd extra pulse bounce and occasional pulse miss as well, which caused the slave dials to get out of step.Īs I was aware that the 30 seconds output contact is not supposed to driving the slave clocks directly, although the setup was like this in my GPO 36 master clock for the pilot dial fitted in the door.Īttached schematic will show the components and I set up the capacitor time constant to about 1 second. ![]()
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