Search found 68 matches

by ku7485
Fri Aug 18, 2006 9:15 pm
Forum: Robotics
Topic: EXACT MEASUREMENT!!
Replies: 11
Views: 8063

HighFrequency wrote:there are EXACTLY 2.54 cm in one inch
Yep, same thing as mine.

2.54 x 10 = 25.4mm

1/25.4 = 5/127

5/127 inches in a millimeter.
by ku7485
Fri Aug 18, 2006 6:15 pm
Forum: Robotics
Topic: EXACT MEASUREMENT!!
Replies: 11
Views: 8063

Is this exact enough for your purposes?

1 millimeter = 0.0393700787 inches

or 5/127 inches.
by ku7485
Mon Aug 07, 2006 7:40 pm
Forum: General Discussion
Topic: Building your own CPU from TTL chips
Replies: 42
Views: 22916

Thanks MrAl for the schematic. Now I have to look for that digital logic simulation software...
by ku7485
Sun Aug 06, 2006 7:20 am
Forum: General Discussion
Topic: Building your own CPU from TTL chips
Replies: 42
Views: 22916

jimandy said: Yes, the 8008 might have been built on TTL logic but it was a single "integrated" circuit and what I think you may be thinking about is how to build one from discrete logic, i.e. a number of simple chips with basic gates, clocks, latches and ROM. Actually, the 8008 CPU in the DATAPOINT...
by ku7485
Sat Aug 05, 2006 12:23 pm
Forum: General Discussion
Topic: Building your own CPU from TTL chips
Replies: 42
Views: 22916

Thanks MrAl. It would be really helpful if you could post up the schematic. Is there some computer software where I can design and simulate and see if my design would work? I think I don't have a breadboard big enough for this right now. For now, I'm gonna do more research on CPU design. BTW, how mu...
by ku7485
Fri Aug 04, 2006 5:19 pm
Forum: General Discussion
Topic: Building your own CPU from TTL chips
Replies: 42
Views: 22916

Hmmm... Found this really cool site: Homebrew CPU . It has a schematic of his CPU design and you can actually even try out and use his CPU that he built though telnet! I have seen compatibles of Z80, 8008, and 8085 in TTL chip form, but can't find schematics or info on these type of projects. I have...
by ku7485
Fri Aug 04, 2006 2:12 pm
Forum: General Discussion
Topic: Building your own CPU from TTL chips
Replies: 42
Views: 22916

Building your own CPU from TTL chips

This might sound crazy... I'm thinking about building my own homebrew computer and also want the CPU to be homebrewed. I have heard of CPUs being built from TTL chips from computers such as the DATAPOINT 2200 CTC. The 8008 CPU in that computer is built from TTLs. Anyway, I have almost no experience ...
by ku7485
Thu Jul 06, 2006 1:32 pm
Forum: General Discussion
Topic: capacitors???
Replies: 6
Views: 1934

During circuitry designing, how would you determine if a capacitor is needed and where it should be placed?