| ??? 05/23/11 18:01 Read: times |
#182345 - Easy if they have a screw adjustment + web cam Responding to: ???'s previous message |
Kai Klaas said:
Adjusting the lengths of pendulums must be a nightmare...
Kai Klaas I wonder if they have made a screw mount at the top, allowing them an easy way to get very fine adjustments similar to what you have for pendulum clocks. You can start a pendulum and time 100 swings and then it will be very easy to compute how many turns to adjust to get the expected period time. Using a web cam, you can measure the period time for n swings to a fraction of a second. As long as they don't adjust by tying knots, it shouldn't be too hard to get the correct lengths. The concept is so nice that it is hard not to want to try to build one. |
| Topic | Author | Date |
| An excellent demonstration of coupling between oscillators | 01/01/70 00:00 | |
| Many many years ago... | 01/01/70 00:00 | |
| You don't suppose that was for a reason, do you? | 01/01/70 00:00 | |
| Sensitivity since lack of "mass" to uphold frequency | 01/01/70 00:00 | |
| Even in well-filtered applications ... | 01/01/70 00:00 | |
| Ground bounce... | 01/01/70 00:00 | |
| Length of gnd/vcc "bumps" in relation to period difference | 01/01/70 00:00 | |
| That was an interesting problem | 01/01/70 00:00 | |
| Signetics (later as Philips) made 74HC7046 | 01/01/70 00:00 | |
| That's a really nice demo | 01/01/70 00:00 | |
| One of many | 01/01/70 00:00 | |
| On a similar note | 01/01/70 00:00 | |
| No coupling | 01/01/70 00:00 | |
| Very nice... | 01/01/70 00:00 | |
| Easy if they have a screw adjustment + web cam | 01/01/70 00:00 | |
It remembers me... | 01/01/70 00:00 | |
| huh? | 01/01/70 00:00 | |
| Just different location of screw adjustmenton clock pendulum | 01/01/70 00:00 |