Altair 8800 Emulator Kit


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Announcing an all-new version 1.5 Altair-Duino!

  • Now available in two models: The low-profile, display shelf friendly “Altair-Duino Standard” with a clear rear panel. The standard version has a USB serial port and a RS232 DB9 serial port. Also available, the upgraded “Altair-Duino Pro” with a large bolt-together acrylic case and an newly designed I/O expansion that includes Geoff Graham’s VT100 emulator (can also be programmed with David Hansel’s VDM-1 emulator), RS232 DB9 serial port, audio jack, SD card slot, and power jack.
    The VT100 emulator now features a USB keyboard port!
  • The Pro version includes an 86-page spiral-bound, full color assembly manual expanded with David Hansel’s software documentation. (Assembly manual available for download with Standard kit.)
  • This kit comes with a micro SD card pre-loaded with disk images including Altair DOS, Altair BASIC, and CP/M with plenty of useful and entertaining programs (at least for the late 70s).

This is a beginner to intermediate kit for people with experience soldering. It can be built in approximately 4-5 hours. Please read the Build Instructions to familiarize yourself with the construction of the kit, and don’t be afraid to visit the forum with questions. IMPORTANT: The instructions page contains addendums that are not in the instruction manual. Read these before beginning construction.

Altair-Duino Standard

Altair-Duino Pro

Pre-programmed Arduino

Altair-Duino Standard

Altair-Duino Pro

Circuit Board(s) and Through-Hole Components

Altair-Duino Standard

Altair-Duino Pro

USB Connection for Terminal Emulator

Altair-Duino Standard

Altair-Duino Pro

DB9 Serial Connection

Altair-Duino Standard

Altair-Duino Pro

Audio Jack (Processor Technology Music System Emulation)

Altair-Duino Standard

Altair-Duino Pro

Micro SD Card (assortment of Altair DOS, Altair BASIC, and CP/M disk images)

Altair-Duino Standard

Altair-Duino Pro

Acrylic Case

Altair-Duino Standard

Altair-Duino Pro

VT100 Emulator Kit*

Altair-Duino Standard

Altair-Duino Pro

Spiral-Bound Printed Assembly/Operation Manual

Altair-Duino Standard

(available for download)

Altair-Duino Pro

*The VT100 emulator allows you to connect a VGA monitor and USB keyboard and will act like a serial terminal.

International Customers (outside the USA):
By default his kit includes a 9 volt power adapter made to connect to a Type A electrical socket (used in the USA, Canada, Mexico & Japan). You can choose to receive a 9 volt EU power adapter. If you want to use another power adapter, make sure it has a 5.5×2.1mm plug and provides 9v-12v at 1 amp. You can also power the Altair-Duino from a USB port.

Also, please be aware that your country or municipality may charge taxes or import fees. As the recipient, you are responsible for those charges. I have no way to know what those charges may be.

Please check shipping charges in your cart before checkout. Unfortunately the Pro kit exceeds the weight allowable for First Class parcel shipping, and may increase international shipping costs greatly. Compare shipping costs between the Standard and Pro kit before ordering.

Additional information

Shipping Weight 42 oz
Shipping Dimensions 15 × 6 × 3 in
Kit Type

Pro, Standard

17 reviews for Altair 8800 Emulator Kit

  1. Altair 8800 Emulator Kit
    5 out of 5

    Very easy to build as long as you pay attention to the instructions and advice. Nothing beats the pictures to verify what you’re reading. That was a good tip to install the LEDs last using the panel to align. I suggest the same panel alignment technique with the switches before they are soldered or you will be unsoldering and moving them. I know, I broke one. The PCB design is very clean with minimal jumpers. Definitely fun to take control the computer using switches like the old days.

  2. Altair 8800 Emulator Kit
    5 out of 5

    I was able to quickly build the kit and had it working in a matter of a few hours. Well documented and well put together.

  3. Altair 8800 Emulator Kit
    5 out of 5

    Amazing kit. Had a bit of trouble with the header pins as outlined in the instructions, but i was able to overcome that with thinner rosin solder and a finer tip. The kit creator has great response time, is extremely helpful, and shipping time was rather fast!

  4. Altair 8800 Emulator Kit
    5 out of 5

    Easy to build kit, well documented apart from the audio connector is not mentioned !

    Led’s are too bright probably change the 150ohm resistor for 220 or 270 ?

    • I took your advice (and the advice of many others) and have replaced the 150 ohm resistors in the kit with 1k resistors. It has a much more pleasing look now.

  5. Altair 8800 Emulator Kit
    4 out of 5

    L1: It’s beautiful! Even the circuit board is nice to look at. It’s truly a work of art.
    L2: It’s fun to put together. It reminds me of the old Heathkit kits.
    L3: Some extra resistors, LEDs, and standoffs were provided.
    L4: It’s not powered by a Raspberry Pi, which would seem like cheating compared to an Arduino.

    D1: The LEDs are far too bright, especially in dim light.
    D2: Don’t run your fingers along the bamboo frame or you will get splinters.
    D3: You can’t easily access the SD card after completing the kit.
    D4: The 12V power supply seems unnecessary when it works with only 5V connected to the programming port. Can anyone suggest a panel mount micro-USB or USB-B female port for the round hole in the MAX3232 rear panel?

  6. Altair 8800 Emulator Kit
    5 out of 5

    The electronics are a piece of cake. It’s all nice, easy through-hole work with generous spacing. Just make sure you’ve got a Helping Hands or other means of holding the board at an angle, as you probably won’t want to let it rest directly on the components while you’re working.

    I had a little trouble with the mechanical aspects, e.g. getting all the screw holes and the front panel to line up, but I’m pretty awful at carpentry, so my results may not be typical. In the end, it turned out looking very good, even in spite of my fudging and trimming to get everything aligned.

    Took me about 4-5 hours in total, but everything worked first try, and I was able to boot up CP/M and play around with Ladder via Putty!

    Tip: if you’re installing the rear panel, solder the power and audio leads BEFORE mounting the panel in place.

    • The rear of the project enclosure is laser cut now, so no more “woodwork” is required!

  7. Altair 8800 Emulator Kit
    5 out of 5

    Building an Altair has been a life long dream of mine. As a collector of computer systems, the Altair has always eluded me. Thankfully, this kit was simple, lovingly crafted, well packaged, and a step by step instructions with photos are very logical. Chris Davis has not only provided the look and feel of an Altair, but has also included every scrap of software he could find. It’s very simple to mount and boot a disk from an impressive collection. This is the kind of the kit and software I’ve been looking for!

  8. Altair 8800 Emulator Kit
    5 out of 5

    Great job creating this kit! I just finished the 1.4 version of the kit with the new 1k resistors, and the serial port option. The fit and finish of the kit is great and the PCB was clearly labeled, with good through-hole solder points. I soldered all the components over a weekend, and then put my attention on painting the bamboo case. Like others, I went with the Rust-Olium satin finish in Oasis Blue from Home Depot. It’s a hair lighter shade than the blue on my other Altair clone, but it turned out great and looks very authentic.

    I used to be a bench tech (in the 80’s) so I’ve had some solder experience, but I think anyone with a good soldering iron and some patience will have no problem building this kit. I’ve tested everything except the DB9 serial port; sadly I can’t find a cable in my garage, so I’ll have purchase one. Bluetooth and USB serial work fine for now.

    The SD card in the kit comes fully loaded with a bunch floppy images. I booted CP/M and played Zork, for old time sake. I also entered the kill-the-bit program in octal using the front-panel switches. The AUX switch trick to load kill-the-bits is clever, but it feels like I’m cheating. 😉

    The kit looks nice next to my PiDP-8/I. If anyone’s looking for another kit to build, then checkout Oscar’s PiDP-8/I at Obsolescence Guaranteed. It’s another fun kit at about the same experience level. The PDP-8 is about a decade older than the Altair. Oscar has also just produced a PDP-11 kit, so old folks like me can go all the way back to our UNIX days, before Linux and GNU.

  9. Altair 8800 Emulator Kit
    5 out of 5

    I love the kit! I bought mine a the Vintage Computer Festival West, and assembled it the next evening in about three hours (I’ve done quite a bit of this type of work, so it went smoothly). The instructions are great, and the kit worked first time when I powered it up (with the exception of one mysterious issue that Frank P. is helping me with…).

    I very minor niggle – the pad layout of single electrolytic capacitor on the board is backwards to the accepted convention (where the square pad is positive). It’s clearly labeled, both in the instructions and on the board, but I still had to check three times to make sure I wasn’t putting it in wrong…

    The completed kit looks great, and with the laser-cut box goes together very smoothly. It’s easy to see the refinements in the assembly process which must have come from investing the necessary time to assemble a buch of these during beta testing – there were no surprises, and everything fit together perfectly. It’s earned a permanent spot on my desk, where it’s happily flashing away right now. And I must say, the price is *very* reasonable for a kit of this quality!

  10. Altair 8800 Emulator Kit
    5 out of 5

    Awesome kit!
    Reminds of the days I used to do Heathkits. Documentation was great and the entire kit was very easy to put together.
    I’m having fun rediscovering computers with just basic hardware and fundamentals (my first computer was a Commodore VIC 20), it’s a nice break from todays technology. It makes you appreciate have far we come in a relatively short period of time.
    Keep up the good work and I look forward to some of the other kits (Apple 1 especially) you are thinking of doing.

  11. Altair 8800 Emulator Kit
    5 out of 5

    Nice to see someone took the time to create such a well-crafted kit – look forward to your having them in stock again.

  12. Altair 8800 Emulator Kit
    5 out of 5

    At age 81, my eyes are a bit worse than when I built my original Altair (Mar, 1975), but I successfully built the duino! Only issue was a solder bridge on the DUE socket that kept SW 11 always on. Took a while to find it, but finally did it. Lots of fun and really brings back memories. Had one bad switch, and I had used it in the on/off position. Chris quickly replied with not one but 2 switches – less than 4 day turn-around.

  13. Altair 8800 Emulator Kit
    5 out of 5

    Wow, what fun! My summer job when I was going to college for my EE degree was as an electronics assembler and those skills were perfect for building this kit. The kit is so well crafted in both the mechanical and software engineering. I did a lot of assembly programming with the 8080 on my first job after I graduated but never had the luxury of owning an 8800, so this was just a dream to tinker with after it was completed. So amazing to fat-finger 8080 code in via the panel switches, and even more amazing to be able to load the CP/M disks from the SD chip. The emulation is superb and Chris’s kit is a work of art.

  14. Altair 8800 Emulator Kit
    5 out of 5

    I first got the earlier 1.4v kit with the bamboo case, and recently upgraded it to the acrylic case and VT100 emulator. It’s so much more fun to use with a PS2 keyboard and VGA monitor as a stand alone than having to use the older version connected via USB to another computer. Awesome quality and great customer support if needed. Highly recommend!

  15. Altair 8800 Emulator Kit
    4 out of 5

    Am encouraged with your careful attention to feedback (LED brightness and other mods). Looking forward to building mine! Hoping to hear shipping confirmation soon!

  16. Altair 8800 Emulator Kit
    4 out of 5

    I found it very important to very closely check parts placement with the copious picture illustrations prior to soldering, as I misplaced some parts getting capacitors, connectors and pin headers put in the wrong places, as well as (totally my fault) soldering 10k resistors where the 1k should’ve gone. I’ve gotten prompt service for replacements, and expect the last gaffe I made (requiring a replacement capacitor and missing resistor) to be resolved very soon now. The instructions have failed to list values for some components (why I goofed a capacitor) and as well seemed to assume the picture was all necessary to show the header placements on the VT-100 board. This is my only criticism. The boards are very neat and well laid out and it’s easy to solder without intricate care needed to avoid solder bridges (save for with double-row headers).

  17. Altair 8800 Emulator Kit
    5 out of 5

    For those who’ve not watched the build video, these are the extremely helpful points I gleaned from watching:
    1) Bend resistor wires across the circuit board, its thickness is a perfect measure of the distance between the edge of the resistor and where the bend needs to be on each side.
    2) Solder in resistors (and other close-spaced components) every other one so you have room to work, then clip after soldering and do the remainder.
    3) Read instructions carefully, paying particular attention to what components go where (and how they go for polarized parts like transistors, electrolytics and LEDs) before soldering. Check what you’re about to do against the pictures (and on-board silkscreening) before committing solder to the job! The silkscreen often shows values for the components, so this too is a helpful detail (that not all kits have) that assists doing a “sanity check” during the placement phase.

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