Projects for 12a, 2014
Feb 18 2014, CWS
Newton's beads links:
Nature piece:
http://www.nature.com/news/physicists-explain-gravity-defying-chain-trick-1.14523
explanation paper: bead_fountain_1.pdf
second paper: chain_fountain.pdf
explanation video: http://www.youtube.com/watch?v=-eEi7fO0_O0
instrumentation:
wideband force transducer
http://www.pcb.com/Products.aspx?m=209C11#.UwNfLXlqtVo
bead chain from McMaster Carr:
http://www.mcmaster.com/#bead-chain/=qqwizc
Another bead chain vendor:
http://rolleasepartsexpress.com/rolleasecontrolchainsandcordloops.aspx
fast CMOS camera for 5K$
http://edgertronic.com/camera/#the-edgertronic
Analog Devices strain gauge wideband signal conditioner
http://www.analog.com/en/other-products/ios-subsystems/5b38/products/product.html
Feb 22, 2014
We purchased #8 and #13 bead chain from McMaster. The ball OD for #8 is 5/32 and #13 is 1/4 inch.
We can use thin-wall stainless steel sleeves to add a rigid section. So we want stainless that is just over 5/32 ID, which is 0.15625".
this vendor sells tubing in 1 foot lengths, $13 per foot. We want size 7X for the #8 bead chain
http://microgroupstore.com/hypodermic-tubing.html