Category Archives: Projects - Page 2

Take on the Machine – The Transistor

Enjoy! We promise to openSource everything once we get it a little more sorted. Pictures / build logs / parts lists / specifications will be posted soon. (Forgive the quick write-up.) While the game worked great, we do have future plans (hints below).

[video and build information after the break]

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MAME – Progress Update

Another quick preview of the progress being made on the MAME cabinets. This is only semi-close to the final profiles, but you may enjoy the progress with my permission.

Also, I need to mention that this is a collaborative effort with Tim. Tim the CAD expert. Thanks Tim.

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MAME – Progress Update

It’s been a little slower then planned as we have been swamped with other projects. However I will present this sacrifice of a semi-completed control panel layout. Enjoy!

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Mr. Exposure – Progress

For those that have been around in the last couple weeks you have probably seen hints of a PCB exposure box. Here are a couple pictures of the progress. This week we did SUCCESSFULLY expose, develop, and ETCH a test board. This process was sped along with the help of the beginnings of our new friend Mr.Exposure. Whom is currently about 80% complete. (We still need to etch his timing circuits and add his decals.)

For those interested here are the ‘Mr.Exposure’ specifics:
2) 250 watt halogens (UV filters removed)
2) Separate, Fused TRIAC control circuits
Able to expose single or double sided boards up to about 7″x9″
Will be controlled by a arduino or atiny. (total overkill, I know)
Exposes pre-sensitized boards in about 4-6 minutes
Cut/Routed from 1/2″ MDF

The total cost was around $40 (including minimalist arduino / etc). We could get this down to about $30, but where is the fun in that?

[more images after the break]

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Upcoming group project: MAME CABINET!

Project the first: MAME Cabinet(s)

theTransistor has been commissioned to create a MAME cabinet for a local business. Their employees will spend many a break using this machine. ( All games will be licensed of coarse. )

We will have a parts budget of around $1000.00 to complete this build, and we will cover the entire process from the ground up. Here is an estimated timeline:

Week 1 (Jul. 17): Planning and Research
Week 2 (Jul. 24): Design the cabinet in Autocad
Week 3 (Jul. 31): Order parts / Prepare artwork in Illustrator / Photoshop
Week 4 (Aug. 7): Get parts back from CNC, Build cabinet
Week 5 (Aug. 14): Internal Assemblies
Week 6 (Aug. 21): Final Assemblies / Artwork Installation / Completion

The panels will be CNCed, we will order professional artwork. This will be a good 1st group project for the space. Come be a part!

This project will be open to the public. Come and watch or help. Just show up to Arduino / Electronics night and ask. Currently Saturdays 6pm to 9pm.

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Nixie Tube Display

Well, it’s been a couple months in the making, but I finally got my Nixie Tube Display working. There’s tons of details on the projects page, accessible here, but here’s a couple movies of it working, and me explaining it.

Early Nixie Tube Test

[videos after the break]

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Eric’s Minimalist Arduino

Eric decided to build a Minimalist Arduino kit which we have here at tT and put it onto a board, so here it is in its simplicity.

[more image after the break]

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Reel-to-Reel Restoration

I was recently gifted a fancy old-timey reel-to-reel audio player and a pile of reels which go with it. After some fiddling, disassembly, more fiddling, giving up, more fiddling, cleaning, and eventually finding the right spring that needs a bit more pressure, we got it to make some noise that roughly resembles a slightly too-fast or too-slow version of the things on the reels. Here’s some pictures of it. Hopefully we can do something exciting with it in the future.

[more images after the break]

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Atari S-Video Mod

Deven recently acquired an Atari 800XL used online. It had poor RF video quality, so he decided to mod it to use S-Video out instead. Here’s some pics of the aforementioned mad genius at work:

[more images after the break]

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Minimalist Arduino Kits Are Out!

We have finished making and assembling the Minimalist Arduino kits. We have a whole page devoted to these little guys, so please have a look:

http://thetransistor.com/arduino/

Those of you who have been anxiously waiting to get your hands on one should come down to our festivities this weekend: Arduino Night, and the monthly Make:SLC Meeting. We’ll be showing them off at both, so feel free to stop by. As always, bring your projects down to show or work on. We hope to see you this Saturday!

Minimalist Arduino Pile

[more after the break]

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Atmega328Ps: Bootloaded. :)

We finally got a couple hours to get the programmer working. Well, it only took a few minutes more to get all 115 Atmega328p’s programmed with the Arduino bootloader. Here’s the pictures.


Alicia working away.

[more after the break]

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Bulk Arduino Components Arrive!

Still waiting on a couple more parts and we can start putting the kits together but this is about 90% of what we need. For those wondering, there are enough components here to build 100+ Arduino’s! (Plus some extra stuff for other projects)

Kits will be offered to the public (without a PCB) in the next couple weeks. These will not replace a standard Arduino, and will not include a PCB or a programmer (USB connection). These are intended for advanced users who wish to build permanent circuits from their projects.

For those interested, the one-off kits will be available in the next couple weeks.
The final cost will be $7.50 + s/h. Parts list below:

qty part
(1) ATMEGA328P-PU with Arduino Bootloader
(1) 28-Pin DIP Socket
(1) LM7805CT 1A 5V Positive Voltage Regulator
(1) 16.0MHz Clock Crystal
(2) 22pf Capacitor
(2) 10uF Capacitor
(3) 10k Ohm Resistor
(2) 150 Ohm Resistor
(2) Green 3mm LED
(1) Wiring Diagram / Instructions

Please direct questions / comments to deven [at] thetransistor [dotcom]

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