| Electronics > Projects, Designs, and Technical Stuff |
| The (long) story of the relay clock |
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| maxwell3e10:
Yes, I guess I've come across these projects too, using a Dekatron or just individual neon tubes as gates. But that is very advanced 20th century technology:) Using relays, incandescent lamps and a pendulum one can stay entirely in the 19th century. |
| Spemo:
--- Quote from: maxwell3e10 on July 28, 2019, 12:51:25 am ---Now a really crazy idea would be to make a "digital" clock without any semiconductors. --- End quote --- It is possible, I have a "pictorial diagram" for this, but it would double the amount of relays. Capacitors are a must though. Then you can definately say it's a rats nest of wires. Oh, and accuracy would be hard to get aswell |
| texaspyro:
--- Quote from: Spemo on July 28, 2019, 07:30:44 am --- --- Quote from: maxwell3e10 on July 28, 2019, 12:51:25 am ---Now a really crazy idea would be to make a "digital" clock without any semiconductors. --- End quote --- It is possible, I have a "pictorial diagram" for this, but it would double the amount of relays. Capacitors are a must though. Then you can definately say it's a rats nest of wires --- End quote --- No relays or transistors were in the neon clock... |
| Spemo:
--- Quote --- No relays or transistors were in the neon clock... --- End quote --- Ok, but I think that would require high voltage, and I don't want to go there honestly.... --- Quote from: maxwell3e10 on July 28, 2019, 12:51:25 am ---Now a really crazy idea would be to make a "digital" clock without any semiconductors. Use a mechanical pendulum for timing, relays for counting, and small incandescent lightbulbs. I wonder if such a thing was ever made during the early electric era. --- End quote --- This is what I meant would be possible |
| maxwell3e10:
Here is one approach using just relays and resistors to build a counter. https://www.ee.ryerson.ca/~phiscock/papers/relay-counter.pdf |
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