[NRVR-Members] Eggtimer Build Party Sign Up

Tue Dec 11 10:50:14 CST 2018

I just remembered I bought a USB endoscope for my site investigation bag and never ended up using it. It is this one [https://www.amazon.com/gp/product/B01MY95HFJ/] at Amazon for $12 - there are newer/better ones out there I'm sure.  Anyway, it plugs into a phone or laptop - I just tried it on mine and, with an extra set ot helping hands, might be a cheap compromise over the video microscope. This (dropbox link) [https://www.dropbox.com/s/8qy57doz9jslip4/WIN_20181211_11_40_51_Pro.jpg?dl=0] is an image I took handheld. The module is already shrink wrapped, but that's the edge of the GPS board - and it was full screen on my 12" laptop so pretty easy to see. The scale in the "distance" is a 1/100" machinists scale, and its laying 1/2" beyond the GPS connections in the foregreound, so it has decent enough depth of field - certainly better than the head magnifier I have. 

--
Jordan
On 12/11/2018 10:57:59 AM, Weeks, Thomas <t.weeks at vt.edu> wrote:
Yeah.. a bench magnifier lamp is barely adequate.. (not sure about the EggTimer component scale).. 
Using the Harbor Freight headband can be a little awkward, but works really great for the up close stuff and is by far the cheapest way to do it:
https://www.youtube.com/watch?v=7J0TIvqErZ4 [https://www.youtube.com/watch?v=7J0TIvqErZ4]
https://www.harborfreight.com/38896.html [https://www.harborfreight.com/38896.html]

Especially if, like Jordan, you hack yours up with cool LED light bands:

But yeah.. I also have a "video microscope station" I've pieced together for around $100 using a solid metal USB microscope and a RaspberryPi + cheap hand-me-down dell Monitor:
https://www.facebook.com/ThomasW.Weeks/posts/10202794583826042 [https://www.facebook.com/ThomasW.Weeks/posts/10202794583826042]
[https://www.facebook.com/ThomasW.Weeks/posts/10202794583826042](medium, high and maz zoom levels):

Though now days China MAKES a complete USB microscope WITH mini display for cheaper than what I can build mine:
https://www.aliexpress.com/item/Digital-Video-Microscope-600X-4-3-3-6MP-LED-Magnifier-microscopio-for-Mobile-Phone-Maintenance-QC/32835634618.html [https://www.aliexpress.com/item/Digital-Video-Microscope-600X-4-3-3-6MP-LED-Magnifier-microscopio-for-Mobile-Phone-Maintenance-QC/32835634618.html]

If I had it to do again.. I would probably just buy one of those.. they look pretty sweet (and are more portable than my luggable station).

But if you don't do much soldering like this.. then I recommend the Harbor Freight magnifier for $5 and a bright light source:
https://www.harborfreight.com/38896.html [https://www.harborfreight.com/38896.html]

T.Weeks

From: nrvr-members-bounces at server2.nrvr.org <nrvr-members-bounces at server2.nrvr.org> on behalf of Jordan Truesdell <jordan at truesdell.org>
Sent: Tuesday, December 11, 2018 9:59 AM
To: Jim Stoll via NRVR-Members
Cc: bruce fette via NRVR-Members
Subject: Re: [NRVR-Members] Eggtimer Build Party Sign Up

I actually had more issues with the RF board.  I did mine with a magnifier headband - though mine has two added diopters, and the middle one was best for fine work. I think Tweeks recently got a digital microscope. 

--
Jordan
On 12/11/2018 9:49:20 AM, Bob Schoner <bob.schoner at gmail.com> wrote:
I tried to solder the GPS unit on the mini transmitter. Spent 2 hours with various magnification options but couldn’t get a single pad soldered though I was able to bridge several pads.

I have lighted magnifier headband, table top, and specs but they were either not enough magnification or too much. What are you folks using/recommending for this?

Bob

On Tue, Dec 11, 2018 at 9:08 AM Jordan Truesdell <jordan at truesdell.org [mailto:jordan at truesdell.org]> wrote:

If you would like to participate in a build party for the Eggtimer Rocketry electronics (already purchased, or available from EggtimerRocketry.com [http://eggtimerrocketry.com/]), please fill out the following Doodle poll:

https://doodle.com/poll/mkmi8zsh668rzrzs [https://doodle.com/poll/mkmi8zsh668rzrzs]

The poll will close on Saturday, December 15th so CHOOSE NOW [https://doodle.com/poll/mkmi8zsh668rzrzs]. I will then announce the definite date+time to everyone and will follow up with a location at a later date. 

Feel free to email me any questions, and to forward this to rocket builders who are off-list. 

--
Jordan
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