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Posted on Friday, Mar 18th, 2022
Show and Tell

What have you Made?   What are you currently working on?    Please Show Us!    Whether finished or not, 'perfect' or not, we want to see.

Bring your projects at 7pm on Tuesday, March 22, and help celebrate the Incredible Creativity that is Arch Reactor!

Bonus:  We expect to have a member from the Astronomical Society of Eastern Missouri (ASEM) on site to guage interest in a series of "Build Your Own Telescope" classes



Posted on Wednesday, Mar 9th, 2022

Pysanky Workshops are well underway and the new students are crafting Spectacularly Beautiful Eggs!    Check out the Photo Gallery here:

There's still time to get in on the fun!   Pysanky Workshops are on our Calendar.   Please reserve your slot on the Registration Spreadsheet, here:

We hope to see you soon!

Joe's Circuit Board Egg
Joe's Circuit Board Egg
Judy's Butterfly Egg
Judy's Butterfly Egg


Posted on Tuesday, Feb 22nd, 2022
A beginner's egg decorated with many flowers in a vase or pot

Pysanky are Ukrainian Style Decorated Eggs.   Worked on whole, raw chicken eggs using wax-resist batik methods with vibrant dyes, they are unique and beautiful.

Please join us at Arch Reactor at one (or more) of our Eight Workshops in March to learn this beautiful craft.

Please see the AR Calendar for dates/times and reserve your space here:

Please contact Diane at  if you have problems reserving your space or have additional questions.

More information about Pysanky at AR including a PDF with instructions and galleries of eggs can be found at


Posted on Wednesday, Feb 2nd, 2022

Every year in January Arch Reactor holds elections for positions on the Board of Officers and Directors.

To reach the entire Board  send mail to

The newly elected Board is:


PresidentDiane S.
Vice PresidentAnn J.
TreasurerDerek S.
SecretaryMorgan M.
Sergeant at ArmsCraig W.


Public RelationsFrank K
WebmasterRobert W.


Posted on Tuesday, Jan 18th, 2022


As a reminder Arch Reactor is entirely kept running by volunteers, which if you remember at the time you joined is mandatory for everyone to serve at least 2 hours per month.

But if you want to be a total bada&&, considered to be a super macho beefcake/beefcakess with brains and brawn,

serving on the board is one way to help keep our community and space going strong (...and that pretty much will cover your volunteer time and then some).

If you are willing to serve please feel free to nominate yourself on this form, or if you know someone that would be a good fit, please nominate them.

We currently need nominations for the President, Secretary, and Director of Education.

The current members filling these roles are precluded from running due to our new term limit rules.

the above form will allow you to submit nominations, as well as seeing who is currently nominated. Google Docs Virtual Whiteboard of Democracy 2021

Please use this form to submit nominations for the Board of Directors. Nominations will be accepted through January 18th.

Below is a description of the duties of each position as it is listed in our Bylaws and Standing Rules.

At the bottom of the page, you can submit the name of your nominee and what position you are nominating them for.

ALSO, THERE IS A DEBATE TONIGHT!!! (and welding curtain mounting got pushed back a day) 


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Visit Us!

Come check out the space at one of our regular Tuesday meetings or Sunday hack nights, year-round. Tuesday and Sunday events are always open to the public, and generally begin around 7:30 pm.

Space Status

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About Our Hackerspace

Arch Reactor was founded in 2009 by a group of friends who liked technology, programming, making, and pizza. Now St. Louis' largest hackerspace, Arch Reactor's growing membership continues to bring new skills, projects, equipment, and people to one place.

For a deeper understanding of what we're about, you should check out our explanation of hackerspaces, perhaps read about one of our members' projects, or (best of all) come meet us in person at the next open event!