Home Gadgetman Forum Book Reviews Links Contact me X-UFO
Gadgets Processors Programming School Old news

Tandy SF-5000

Interestingly, they use a concept drawing of the kit itself on the front of the box.
[Boxed kit]

3 x 1.5V C-size Alkalines
Production year: 1971OS: - Undefined -
Type: Test equipmentRAM: 0ROM: 0
Display: None

The Science Fair SF-5000 Electronic Computer

Don't laugh. That's what it says on the box.

Interestingly enough, I can't find anything that qualifies as 'electronic' in this kit.
What I found is 3 C-cell batteries, a row of incandescent bulbs, a board to insert wires, and under it; a lot of switches.
At best it can be called an 'electro-mechanical calculator', but as all switches has to be set manually, even that's a long shot.

It seems that you can make it do some nifty logic tasks, though, and may even have helped some to understand digital logic.

The year was taken from the publication year of the manual. I don't know if there was ever a second edition of the manual, but at the end of this one there's a suggestion thatt people try to create their own 'programs' for it, and that good examples might be published in a new edition. (The Inventory number of the manual, 28-199, is printed on the back)
If anyone have an updated version, feel free to mention it to me.

Useful links:

Dave's Computers
Dave Dunfield has a scan of the manual on his site.

Got any comments? Write them here:

Email address:
Display email address?
  • Comments will not be visible until I manually OK them.
  • You don't need to give an email address if you don't want to. But if you do, you decide whether or not it is visible. (No addresses will be given to third-parties, it's only there to make it easier for me to get back to you)
  • This script WILL log your IP adress.
  • Profanities, 'L337' speak, links to unrelated stuff like Pr0n and online gambling will result in your IP being banned, a message being sent to your ISP and anything else nasty I can think of...
  • Suspicious HTML in the comments field will also cause me to give you hell.
  • While I don't have any user registration here, that's no reason to use a 'nick' belonging to someone else.