Dan Berard

Biophysics PhD student, microscopist, hardware hacker

Montreal, Quebec
Send a private message
Similar accounts worth following

This user joined on 02/22/2015.

Things I've Built

Musical DRSSTC

A double-resonant solid-state Tesla coil that can play MIDI music from a PC. Produces ~2 foot arcs.

View all

Share this profile



Morning.Star wrote 04/27/2017 at 05:49 point

OMG! Thanks for posting your STM and those awesome pictures. Just wow...

Speechless... :-)

  Are you sure? yes | no

Dan Berard wrote 04/30/2017 at 15:02 point

Thanks for the follow!

  Are you sure? yes | no

Roman wrote 04/16/2016 at 18:42 point

Hi Dan, thank you for the follow and like.

  Are you sure? yes | no

Dan Berard wrote 04/17/2016 at 15:49 point

You're welcome, nice job on packing lots of functionality in a compact instrument, and the software looks nice too! And thanks for following my STM!

  Are you sure? yes | no

Andrew Ferguson wrote 01/06/2016 at 09:52 point

It's a good point. Actually there are several areas of this project that will benefit from feedback. The one that I may attack first is temperature control of the laser diode. It turns out that relatively small temperature fluctuations affect the diode mode/wavelength and this is the most serious stability issue at present. There is a reason that industrial tools use a HeNe laser in their interferometers!

  Are you sure? yes | no

Dan Berard wrote 01/06/2016 at 13:48 point

Hmm yeah that's a good point. With a peltier and thermistor on the laser diode (in a closed box), with an analog PI controller, you should be able to get extremely good temperature stability.

  Are you sure? yes | no

Andrew Ferguson wrote 01/04/2016 at 21:46 point

Nice collection of physics/science related projects here. Thank you for following my interferometers.

  Are you sure? yes | no

Dan Berard wrote 01/06/2016 at 05:11 point

Thanks! The interferometer projects are very cool! It might be neat to close the loop between the photodiode and voice coil with a simple PI loop. You could then read off sub-wavelength displacements from the control voltage sent to the coil, and the response would be linear.

  Are you sure? yes | no

Become cool instantly

Create your profile like Dan Berard and many others