Measure the mass of an eyelash with a DIY microbalance https://tube.loping.net/videos/watch/257a7868-4e23-4d48-9dca-68302268f310 I built a microbalance based on a design by Paul Grohe: http://www.youtube.com/watch?v=n90whRO-ypE It is has a precision of about 5 micrograms, and I measured a single eyelash at about 35 micrograms. The balance is built from an analog panel meter that is controlled by a servo loop which optically monitors the meter's position. Adding mass to the meter's needle requires that the servo loop add more current to maintain the needle's position. This additional current is read, and converted to a mass value. Sun, 12 Jul 2026 13:15:54 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.loping.net Measure the mass of an eyelash with a DIY microbalance https://tube.loping.net/lazy-static/avatars/8a56e488-2120-4649-a417-badf5893657b.png https://tube.loping.net/videos/watch/257a7868-4e23-4d48-9dca-68302268f310 All rights reserved, unless otherwise specified in the terms specified at https://tube.loping.net/about and potential licenses granted by each content's rightholder.