| ??? 03/02/07 18:08 Read: times |
#134121 - just a thought Responding to: ???'s previous message |
on my arm is an incredibly accurate and very cheap device. Have you considered a watch crystal and the associated whatever they use to have a precision of a few seconds per year (I leave it to you to figure out what that comes to in ppm). Oh well, I got curious and figured it out myself: a watch that stay within 31 seconds per year (my Pulsar watch is better) will be precise to 1 (ONE) ppm. I have seen $10 watches that, while less attractive to look at were equally precise.
Erik |
| Topic | Author | Date |
| Crystal Oscillator Accuracy | 01/01/70 00:00 | |
| Its probably highly non-linear | 01/01/70 00:00 | |
| commercial crystal oscillators | 01/01/70 00:00 | |
| You should tell us the speed of your moving object | 01/01/70 00:00 | |
| speed of shock absorber | 01/01/70 00:00 | |
| Induced voltage | 01/01/70 00:00 | |
| calibration problem | 01/01/70 00:00 | |
| Calibration | 01/01/70 00:00 | |
| just a thought | 01/01/70 00:00 | |
| Temperature extremes of your watch | 01/01/70 00:00 | |
| good one Lynn :) | 01/01/70 00:00 | |
| Consider the following: | 01/01/70 00:00 | |
| correct, but incorrect | 01/01/70 00:00 | |
| reconsider this... | 01/01/70 00:00 | |
| I have seen far worse than this | 01/01/70 00:00 | |
| my thought | 01/01/70 00:00 | |
| the plate vibrates which it WILL do | 01/01/70 00:00 | |
| that will be big problem then | 01/01/70 00:00 | |
I think Steve has it... | 01/01/70 00:00 |