Posted on Tuesday, Feb 27th, 2018

Fire and Ice was a successful event. Thanks to all of you who helped us pull off such a great evening.

Posted on Tuesday, Feb 6th, 2018

We had over 32 people attending in the space and out at the fire pit. Hard Drives were destroyed. Large Piles of recycleables got reduced to usable parts. Lots of Food was eaten. Lots of soda and beer was consumed. Eagles fans had a great night. 

Posted on Tuesday, Jan 30th, 2018

Please welcome the newly elected board!


Posted on Monday, Jan 29th, 2018

Super Bowl of Destruction

Everyone is invited to come to the Arch Reactor for the Super Bowl of Destruction. We will have the football game on our big screen for everyone to watch. Not interested in football? Don’t worry, we also throw this party as something for the non-football enthusiasts. As a hackerspace, we use this time to breakdown all of the donations that are no longer usable or fixable. We have hard drives, computers, printers, server equipment, and more! Come join the mayhem and destruction! Bring a Super Bowl snack to share. We had some great food last year.
In addition, this year we are continuing our Hack-a-thon challenge. After the destruction we will rebuild with the donated materials in the Space. This year we will create a hack-cycled (in the sense of using something as it was not intended to be used) robot for our Fire and Ice fundraiser. This will be a large scale collaborative project. Don’t worry if you are not an expert, we will have roles for all skill levels!

Destruction starts at 12pm on Sunday, February 4th at Arch Reactor, 2215 Scott Ave. 63103.

Posted on Tuesday, Jan 16th, 2018

On Saturday January the 13th at 1pm Arch Reactor held a Chainmaile class. About 12 people were in attendance. AR brought in an outside instructor named Larry Brown from Inventor Forge.

We covered the basics of making 4-on-1 chainmaille.  Larry showed: How to Wrap Wire to make something that looks like a spring, cutting the spring into ringlets, and connecting the ringlets to make a chainmaille key-chain, then belt and the basic design to turn your chainmaille key-chain or belt into a chainmaille shirt (Hauberk).

Nathan S made this from the instruction he received at class.


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Upcoming Events


  1. 3D Printer Meetup

Sunday, March 25th

  1. Pysanky Eggs
  2. Open Build Something!
    • Start time: 07:00pm
    • End time: 10:00pm
    • Where: 2215 Scott Ave, St. Louis, MO 63103, USA
    • Come stop by and visit! Open build night to work on projects and hang out!

    • View this event in Google Calendar

Tuesday, March 27th

  1. Pysanky Eggs
  2. Shop Training: Basic Wood Lathe

Thursday, March 29th

  1. Laser Workshop Night
    • Start time: 07:00pm
    • End time: 08:00pm
    • Where: 2215 Scott Ave, St. Louis, MO 63103, USA
    • Feel free to come by to learn how to use the laser cutter, talk about laser cutters, work on laser cutter projects, etc!

      Contact Person: Travis

    • View this event in Google Calendar

Saturday, March 31st

  1. International Open Day
    • Start time: 10:00am
    • End time: 09:00pm
    • Where: 2215 Scott Ave, St. Louis, MO 63103, USA, Archreactor, Arch Reactor
    • Arch Reactor, Just like many Hackerspaces World Wide, invite you to come in and see our Space, in celebration of International Open Day.

      Come in and see who and what we are, how you can become part of the Group or just hang out and have some fun in conversation. We will be Open from 10am until at least 9pm that day.

    • View this event in Google Calendar
  2. March BoardGame Night * ArchReactor
    • Start time: 12:00pm
    • End time: 11:30pm
    • Where: 2215 Scott Ave, St. Louis, MO 63103, USA, Archreactor, Arch Reactor
    • Come On Out and Play games With us. If you don't know games that's OK we are friendly and love to teach. If you do, bring your Favorites along and let get a Game in.

      We'll have Food there, and I'll happily take 5$ in exchange for letting you eat all day.

      We start at Noonish and Play until you Leave or after Midnight, whichever comes last. :)

    • View this event in Google Calendar

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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!

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