Search found 10 matches

by VJR85
Sat Feb 16, 2008 7:35 pm
Forum: General Discussion
Topic: Substation Question
Replies: 4
Views: 1217

Substation Question

I'm doing a project for school that involves designing a substation. I am having a difficult time deciding on the loads to use. I plan to have it power a small residential area and gather the data for the average power consumption of a neighborhood like this. I would like to have another load that i...
by VJR85
Sat Nov 25, 2006 8:10 pm
Forum: Up For Grabs
Topic: WTB: Basic (cheap) Oscope/Function Generator & Component
Replies: 3
Views: 3188

Sounds good.

I live in Houston, TX. Zip is 77037. I ship large items often, so I'm used to shipping charges.

Let me know your asking price and a rough estimate on shipping.


Thanks
by VJR85
Tue Nov 14, 2006 11:39 pm
Forum: Up For Grabs
Topic: WTB: Basic (cheap) Oscope/Function Generator & Component
Replies: 3
Views: 3188

WTB: Basic (cheap) Oscope/Function Generator & Component

I'm in need of an oscilloscope and function generator to assist me throughout college with projects, etc. Doesn't need to be fancy or modern...just as long as it works fine.

I'm also interested in any components or miscellaneous parts. Capacitors, inductors, ICs, etc.

Thanks
by VJR85
Tue Nov 14, 2006 9:22 pm
Forum: General Discussion
Topic: Keypad causing problems?
Replies: 3
Views: 1497

Keypad causing problems?

I have a keypad to input data (1-9) into a 74147 encoder. This runs through a 74121 one-shot with each keypunch advancing the state of a JK flip-flop counter. The counter goes through three states with each corresponding to a digit of a three-digit number. The data from the original encoder goes to ...
by VJR85
Tue Nov 14, 2006 9:01 pm
Forum: General Discussion
Topic: Monostable Multivibrator
Replies: 4
Views: 2006

Thanks for the link!

I'm kind of stuck with this components since it's for school and I was told what to use.
by VJR85
Mon Nov 13, 2006 12:50 am
Forum: General Discussion
Topic: Monostable Multivibrator
Replies: 4
Views: 2006

Pulse is 20ms. I have the equation...just not sure about the connections. I need it to supply the pulse and return high. I just need it to advance a counter with an active-low clock input. Pins 3&4 enter an OR gate with active-low inputs, so if one is low, the output will be high regardless? Or does...
by VJR85
Sun Nov 12, 2006 11:11 pm
Forum: General Discussion
Topic: Monostable Multivibrator
Replies: 4
Views: 2006

Monostable Multivibrator

Hi, I'm using a one-shot to avoid switch bounce and allow for propagation delay. I haven't used one before and I can't find an example online. The datasheet is here: http://electronics-diy.com/pdf/74121.pdf I have an active-high input and need the 121 to provide an active low output to trigger a clo...
by VJR85
Thu Sep 07, 2006 6:17 pm
Forum: General Discussion
Topic: Basic IC Question
Replies: 8
Views: 3019

It's a local college in Texas. University of Houston.

Degree is just a bachelors in Electrical Power Technology.
by VJR85
Wed Sep 06, 2006 9:15 pm
Forum: General Discussion
Topic: Basic IC Question
Replies: 8
Views: 3019

Thanks! :cool:
by VJR85
Wed Sep 06, 2006 8:17 pm
Forum: General Discussion
Topic: Basic IC Question
Replies: 8
Views: 3019

Basic IC Question

I am taking an introductory course to digital. We use a trainer board at school, but I don't have one at home. I am trying to build the circuit at home to learn how to do it without the trainer board, but one thing seems wrong. The IC is a 74LS08 with four two-input AND gates. http://www.alldatashee...