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Posted on Tuesday, Nov 22nd, 2022

Tonight we pulled out the lasers to decorate a Feast!

Laser-Decorated Cookies
Laser-Decorated Cookies

Posted on Tuesday, Nov 1st, 2022

Happy Thanksgiving
Happy Hacksgiving!

Arch Reactor will be hosting a Hacksgiving/Thanksgiving Potluck on 11/15 at 7pm for members, families, and Friends. Come down to the space and share some food and conversation!   If you're new, we're happy to give you a tour!

Arch Reactor will provide a main meat dish (current plan:  Turkey from Sugarfire Smokehouse)  Please bring an additional main dish, a side, or a dessert of your choice. Please sign up on this spreadsheet to make sure we don't all bring the same thing AND please let us know how many you're bringing to ensure that we have an accurate count so that we have enough turkey for everyone:

Posted on Sunday, Aug 14th, 2022

As the STL's First HackerSpace / MakerSpace, We want to invite our neighbors, area businesses, community memebers, and their family's to come visit our space and see what's possible.


We'll have Fairy Floss (Cotten Candy) First introduced in St. louis at the 1904 Worlds Fair.  Hotdogs to Roast and tea to Drink, which were also 1904 introductions.  Yard Games to Play, Tours of our space, and of Course Liquid Nitrogen ice Cream. 

Posted on Monday, Jul 11th, 2022

Iris, Diamonds, and Butterfly Cardweaving samples
Cardweaving Pattern Choices

Please Join us at Arch Reactor by 7pm on Tuesday, July 12 to learn about the ancient art of Cardweaving and create your own narrow band suitable for a bookmark or friendship bracelet.    Choose from one of three patterns, in order of difficulty::   Iris Flowers (fairly easy), Diamonds (average complexity), or Butterflies (a lttle tricky and time-consuming to set up, but fairly easy to weave)?    Arrive early to choose your colors from the available selection!     

This is a hands-on workshop and young children will Need help from their grown-up.   First-come/first-served, max class size of 12, please.

Posted on Monday, Jun 20th, 2022

On Saturday, June 18, Arch Reactor participated in the Red Bull Soapbox Derby in Des Moines, Iowa!    

We're still waiting for the official videos to be posted somewhere, and we didn't win an award, but We Made The News!

Congratulations to the Entire Team for a Great Entry!!!   We're entering again next year, right?!?!


AR's Soapbox Derby Entry mid-course
Flying Down the Course!


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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

The space is currently:

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!