A 'work one' from the Wobbly Workshop today
Physicists - they're not very good at setting up oscilloscopes
"Do I need a flaming 'silliscope' to demonstrate standing waves?"
Well you do now.
1.5mm holes were drilled at 15mm intervals along a length of 75mm dia aluminium tube (scrap from a roller blackboard)
Hardwood ends were machined on the CNC router...
...and a thread cut on the connector scavenged from an old bunsen burner.
The connector was bolted in and the closed end fitted, both sealed with silicone.
The other hardwood end cracked, so I remade it in ply. It was then fitted so that it held a latex membrane
(god knows what ebay will offer me as 'other items you might be interested in' after buying sheet latex. )A speaker (unwanted PC speaker) was then fitted over the membrane.
After testing for leaks, connecting the speaker to a signal generator and the tube to the gas tap
(and flushing i with gas), we have a 'flaming oscilloscope' for demonstrating resonance!
Video
http://youtu.be/yx2Ph3SZWSUNeeds a bit of tweeking.
Edit - connecting the supply to 2 gas taps, via a 'Y' connector worked wonders.