Search found 5 matches

by rsfairman
Thu Apr 22, 2010 2:38 pm
Forum: General Discussion
Topic: Opto-coupler Question
Replies: 2
Views: 629

Re: Opto-coupler Question

Good info. I'll be glad when I've assembled this and it works.
Thanks.
by rsfairman
Wed Apr 21, 2010 4:52 pm
Forum: General Discussion
Topic: Opto-coupler Question
Replies: 2
Views: 629

Opto-coupler Question

Is anyone able to recommend some fast opto-couplers appropriate for relatively high speed digital signals (say 100,000 pulses/sec)? I'm nearing completion of a project, but I've hit a hurdle; I think that I'm using the wrong opto-coupler. I have a PC communicating with a CNC lathe over the parallel ...
by rsfairman
Sun Apr 04, 2010 1:23 pm
Forum: General Discussion
Topic: 74194 Shift Register
Replies: 6
Views: 2972

Re: 74194 Shift Register

It works! I made a de-bounced circuit with an Arduino board (OK, de-bounce *program* would be more accurate), and it works perfectly. I knew about switch bounce in the abstract, but, never having done anything like this, I didn't know how much of a problem it could be. I just assumed that you'd get ...
by rsfairman
Sat Apr 03, 2010 5:20 pm
Forum: General Discussion
Topic: 74194 Shift Register
Replies: 6
Views: 2972

Re: 74194 Shift Register

Yes, de-bouncing is a good idea. I'll see what I can whip up for that with my Arduino. That's using a golden hammer for this problem, but it's handy and easy.
by rsfairman
Sat Apr 03, 2010 10:48 am
Forum: General Discussion
Topic: 74194 Shift Register
Replies: 6
Views: 2972

74194 Shift Register

Who has experience with the '194 shift register? I'm using the 74HC194N (Mouser part # 771-74HC194N), and the datasheet can be found at http://www.nxp.com/documents/data_sheet/74HC_HCT194_CNV.pdf. I'm trying to build a circuit with 4 LEDs and one button. Initially, LED #1 is to be on while the other...