Hi There are two parts to this problem. One is to reduce the back emf from the coil that generates the voltage to arc across the opening contacts. A diode across the coil will achieve this. Two is to

Hi I am aiming to use a stepper motor driver with an Arduino like this one. Only $USD10 for the driver including shipping. Regards Darren Conway New Zealand Virus-free. www.avast.com

Hi The problem with a capacitor across the contacts is that when the contacts first touch, the capacitor charging current is very high. This damages the contacts. The problem with a resistor is that w

Hi I have my Solari flip clock. It is dirty but complete. The plan is to clean and lubricate. I do not intend to return it to as-new condition. The patina and wear is part of its history. It has a 48V

Hi Prior to Covid, delivery from China was usually 4-8 weeks. I currently have 13 items on order that I am waiting for. The oldest order is 22 Oct 2020. The problem here is that most of those small pa

Hi Here is a Aduino Motor shield that would be ideal for driving the Gents and Solari slave clocks. Regards Darren Conway 36 Orr Crescent Lower Hutt New Zealand ph +64 (0)4 569 1963

Hi If I only had to drive slaves from the Synchronome, an opto isolator would be the obvious choice. I already have one. An Aduino with ready made shield is probably the easiest way to convert a 30 se

Hi A T&N might be the perfect solution but finding one in this part of the world would be difficult. Getting fiscal approval from my better half to buy one would be even more difficult. Regards Darren

Hi Neil My research on my new, very old Solari clock indicates it is fed with a bipolar 24V impulse. Not compatible with Synchronome slave clock pulses. I am interested in your driver. How does it wor

Hi The listing claims it is a slave clock. I hope it is. Regards Darren Conway 36 Orr Crescent Lower Hutt New Zealand ph +64 (0)4 569 1963

Hi I have some relays that will do the job but I am thinking that a cheap Chinese opto-coupler might be a better solution. Even a single relay will generate a spark at the contact. So there would be b

Hi I now have 1 Master and 2 Slaves running from a 12V supply. There is enough resistance to limit the current to within spec (~240mA). I am seeing arcing across the Master clock contacts. This can't

Hi I am thinking of using a mechanical rotary encoder with push button They produce 15 pulses per revolution. Cheap and simple. Regards Darren Conway This email has been checked for viruses by Avast a

Hi I have my master nome running nicely. I am now ready to connect a couple of Gents slave clocks to it. The Gents mechanisms are sealed in Bakelite enclosures, so the only way I know to advance them

Hi One of the most useful features of a mathematical model is the ability to test variants and optimise design. For example, I have seen measurements of different shaped pendulum weights to measure ae

Hi So what if a pendulum clock was "built" as a set of mathematical equations representing the real world? The basic equation of a pendulum operating in free-space is simple and easy. Building a mathe

Hi Given that the optimal performance of a pendulum based time keeper requires minimization of higher order effects. This will maximize operation in the 1st order linear zone. The ideal pendulum clock

Hi How about: pendulum clocks powered with electricity. This opens it up to any clock where the time keeping is based on a swinging mass. It includes nomes, custom electronics, Hipps etc etc. Regards

Hi I have read that the right combination carbon fibre in resin can have near zero thermal coefficient of expansion. Your concerns could be addressed by increasing the vertical surface area of the bon

Hi That special adhesive is probably the stuff used to bond rear view mirrors to car windscreen glass. Regards Darren Conway 36 Orr Crescent Lower Hutt New Zealand ph +64 (0)4 569 1963 Virus-free. www