| General > General Technical Chat |
| HELP Required on Science Demos! |
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| sandalcandal:
You should post more videos like this to the main channel. You'll be swimming in views :-DD |
| Kleinstein:
The frequency shift is quite small for the disc shaped crystalls, but it is quite a bit larger for the 32 kHz tunig fork types. Chances are one would not need such a high quality counter. The change may reach the 1 ppm range and thus measurable in a much simpler setup. The observed change with the counter was a bit slow - so not sure if the is atually the direct gravity effect on the crystal. It could be as well be a thermal effect on the quarz oven. Turning the oven upside down can upset the temperature, both as a transient and static. |
| EEVblog:
--- Quote from: sandalcandal on October 09, 2021, 10:53:31 am ---You should post more videos like this to the main channel. You'll be swimming in views :-DD --- End quote --- From the number of Youtube videos our kids get sent to watch from teachers, I can believe it! |
| EEVblog:
--- Quote from: Kleinstein on October 09, 2021, 11:40:06 am ---The observed change with the counter was a bit slow - so not sure if the is atually the direct gravity effect on the crystal. It could be as well be a thermal effect on the quarz oven. Turning the oven upside down can upset the temperature, both as a transient and static. --- End quote --- The slow update was due a fixed 1/sec sample rate required to get the extra digits resolution. |
| RJSV:
Thinking a while, what would be popular, (although not everyone in class gets curiousity), is that THERMAL IMAGE IR camera. Possibly because that's usually a 'hidden' part. Kids would ponder, how something could be there, influencing how warm something gets, yet radiation always has that unseen quality. The IR camera makes it clear, radiation travels like 'light' does...surprise: Light IS radiation. Plus, you can do lots of side activities, using an IR camera on your experiment bench. |
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