Search found 3 matches

by emerson_85
Sat Apr 06, 2002 12:18 pm
Forum: General Discussion
Topic: circuit help
Replies: 10
Views: 3229

Re: circuit help

Oops! You're right, I forgot to draw the line from the last 4.7K pullup resistor to U2A<p>Sorry about that.<p>As for contact bounce, this is not a complex requirement, as originally stated. Even when the contacts bounce, it won't change the state of the latched output, unless you're pressing all the...
by emerson_85
Sat Mar 30, 2002 9:16 pm
Forum: General Discussion
Topic: Chip ID
Replies: 2
Views: 1341

Re: Chip ID

Probably not be too useful - it's a one-time programmable chip (or mask programmed) so unless you're going to run the exact same code that's already in it for your own circuit, it's probably a throw-away...<p>You can look at Zilog's web page for more info, but the Z8 you have is a bit old, and the l...
by emerson_85
Sat Mar 30, 2002 8:18 pm
Forum: General Discussion
Topic: circuit help
Replies: 10
Views: 3229

Re: circuit help

All you need for this circuit is a 74LS373, an inverter (74LS04 or something else that can invert), 6 diodes, 6 4.7K resistors, and a 220-330 ohm resistor. Oh, and the 6 LEDs and switches, of course.<p>I have posted the schematic at http://www.apricot.com/~emerson/images/6Buttons.gif <p>where it wil...