Build an electroluminescent glass panel display -- an Apollo DSKY

How to build a replica DSKY unit using an electroluminescent driver circuit and screen-printed conductive ink.

Source code, PCB files, screen print graphics, etc:
https://github.com/benkrasnow/DSKY_EL_replica

Other folks in the community have been working on authentic DSKY replicas, notably, Fran Blanche:  https://hackaday.com/2017/05/29/re-creating-the-apollo-dskys-display/    https://youtu.be/hiqibWP2WNA?t=647 


https://www.patreon.com/AppliedScience

Drill through anything (conductive) with Electrical Discharge Machining

I show how to build an EDM drilling machine, describe how it works, and where to buy parts. 

Source for the arc generator: https://baxedm.com/BaxEDM

YouTube channel: https://www.youtube.com/channel/UCy4kgsAYxcraee8w5SfqXPA/videos

 I used the Kflop, Kanalog, and Kstep from https://dynomotion.com/

OpenBuilds CNC machine: https://openbuildspartstore.com/openbuilds-sphinx-55-20-x-20/

 EDM hollow drill rods: https://www.ebay.com/itm/EDM-WIRE-MACHINE-DRILL-0-60mm-1-CERAMIC-GUIDE-30-SINGLE-HOLE-BRASS-TUBES-EDM/161395647605

 EDM drill head: https://www.aliexpress.com/item/EDM-Rotated-Head-for-Small-Hole-EDM-Drilling-Machine/32353532977.html 

EDM drill head seals: https://www.aliexpress.com/item/Rubber-Seal-for-EDM-Small-Hole-Drilling-Machines/789294397.html 

Airless paint sprayer: https://www.amazon.com/gp/product/B004Z2090U

Water filter: https://www.amazon.com/gp/product/B01CFOFZ08

Cartridges are cheap, similar to this: https://www.amazon.com/dp/B01FKNK69G/

https://www.patreon.com/AppliedScience

Electro-osmosis: pumping water with electricity and no magnets

An electro-osmotic pump is an unusual and interesting way to pump fluids and also measure their flow rate with only an electric field (no magnets).

Refs (in order of relevance)
https://sci-hub.tw/10.1016/S0039-9140(99)00320-3
http://micromachine.stanford.edu/~dlaser/research_pages/electrokinetics_and_eof.html
https://www3.nd.edu/~changlab/documents/Youcef.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2756694/
https://psec.uchicago.edu/library/photocathodes/SiO2_OH_model.pdf


https://www.patreon.com/AppliedScience

Testing UV absorption eyewear and sunscreen with a deuterium light source

I use a deuterium light source to determine the absorption effectiveness of UV safety glasses and sunscreen, as well as common transparent materials.

Another interesting application of sunscreen, UV, and visual indicators:
https://www.youtube.com/watch?v=h8VJft5Xq5g

References for CIE erythema action spectrum:
http://sci-hub.tw/10.1039/C1PP05271C

https://pubs.rsc.org/en/content/articlelanding/2012/pp/c1pp05271c/unauth#!divAbstract

https://en.wikipedia.org/wiki/Deuterium_arc_lamp
https://en.wikipedia.org/wiki/Emission_spectrum#Radiation_from_molecules

http://www.aseq-instruments.com/

https://www.ebay.com/itm/Fused-quartz-glass-plate-50mm-x-50mm-x-1mm-2-pieces-Free-Shipping/123634196683

https://www.amazon.com/gp/product/B001RKFZPC/

https://www.patreon.com/AppliedScience

High-resolution screen printing demystified

A complete guide to making high-resolution screen prints with minimal tools.



Notes: When applying film emulsion to the screen, the matte surface should face the screen.  The glossy surface is the plastic backing, which is removed later, just before exposure.

The resolution test shown in the video actually indicates line width, not pitch.  So, the 1mm sample has 1mm lines and 1mm spaces.  Thus, the pitch is actually 2mm.

The Nazdar paint instructions say there is a 30 minute "induction" period that is needed for the catalyst to start working.  Nope. Just weigh out the paint and catalyst, mix, and immediately apply to the screen. Print the needed items quickly, and clean it off the screen as soon as possible.  Use disposable mixing cups / tools.  It is *messy*!

Shopping list:
Pre-stretched screen: https://www.mclogan.com/shop/aluminum-12x17-p-1173-c-293_297_379_3.html
Squeegee: https://www.mclogan.com/shop/squeegees-per-inch-durometer-p-5-c-293_297_1_4.html
Epoxy paint: https://www.mclogan.com/shop/nazdar-ade-series-epoxy-screen-ink-p-1145.html
Paint cleaner: https://www.mclogan.com/shop/mclogan-graphic-press-wash-p-156.html
Emulsion remover: https://www.mclogan.com/shop/mclogan-emulsion-remover-concentrate-p-149-c-187_42_44.html
Degreaser: https://www.atlasscreensupply.com/store/p/163-ICC-858-Stain-Remover/Degreaser-Quart.aspx
Film emulsion: https://www.atlasscreensupply.com/store/p/772-DuraCap-11-x-14.aspx
Vellum paper: https://www.amazon.com/Office-Depot-Premium-Translucent-Vellum/dp/B014SBHGMQ/


Consider using 365nm LEDs instead of fluorescent tubes for exposure.

https://www.patreon.com/AppliedScience