crome.org

home for nerds

Create a time lapse from a sequence of images.

Here's how to convert them to an animation: Given a bunch of images: ... 2015-07-30_06-30-22_.JPG 2015-07-30_06-30-27_.JPG 2015-07-30_06-30-32_.JPG 2015-07-30_06-30-37_.JPG 2015-07-30_06-30-42_.JPG 2015-07-30_06-30-47_.JPG ... 1. copy the images to a new directory...

Respironics System One DIY Battery

Well, I just got a CPAP machine, and it's amazing, I can sleep through the night now.  Yipee. Now I want to be able to use it if I'm away from power (or the power goes out) for a night or two, so I'm building up a battery pack to power it. The respironics batteries...

Inside the Fireface 800

I had my fireface 800 apart the other day, and here's what's in it.  Click for higher resolution. Important chips are: AKM AK4396VF :  DAC THD+N: -86dB, SNR 100 dB JRC 4580: Dual Op-amp.  Input noise: 0.8uVrms typ. AKM AK5385AVF: ADC DR: 114dB, SNR 114 dB JRC 2043:...

Motu 828 update

Quick update on the MOTU 828 Fix:  Randy reports that it's been working just great after the capacitor replacement!  Nice.

Weird Blue Gel

I was etching a PCB and made some weird blue gel. I posted a question on a chemistry forum to see what is might...

Neat DIY Metal solder paste stencil

Etchant:  1:3 Muriatic acid:hydrogen peroxide solution  In ViewMate Setup -> DCodes Select all and Operations->swell by -0.0075 https://www.youtube.com/watch?v=JWUJtmgh55M  

Print a 3d topographical map of anywhere in the world

I was looking for a way to 3d print a 3d topographical map, and found an older post on matterhackers.  Unfortunately, those instructions didn't work, and were quite complicated even if they did work. Here's a much easier solution: Get the  SRTM elevation data directly...

Things to try

I want to try making some PVA plastic. https://www.youtube.com/watch?v=Xyrl__BVCqA Ingredients: 50-50 water + white PVA glue Add a bit of glycerin, stir well Add filler -- talc, or whatever you want. Add 4% borax solution, stir well....

[cc_thingy]