HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
News
Gadget Freak

Gadget Freak Case #184: Interactive Beer Pong Table

NO RATINGS
1 saves
View Comments: Newest First|Oldest First|Threaded View
78RPM
User Rank
Platinum
Would a constant current source help?
78RPM   10/16/2012 10:38:46 AM
NO RATINGS
It's impossible to read the documentation but I'm responding to your problem with inconsistent linearity of photocells.  Yes, photocells are imprecise and non-linear. Much of the voltage appears across the limiting resistor. Consider putting a transistor as a constant current source in series with photocells, eliminating the resistor. The voltage across the transistor will be a consistent two diode drops. That way, all the voltage change appears across the photocell. I hope I have understood your problem.

johnmoran
User Rank
Iron
Instructions ...
johnmoran   1/20/2012 10:03:15 AM
NO RATINGS
Hello

You may be an engineering student but your instruction writing skills are appalling - please try to get all the images the same size, then people may be able to read them.

John

Partner Zone
Latest Analysis
Manufacturers are speeding design by including their suppliers in the process – and it’s not just automotive and aerospace.
Design engineers and project managers work closely with the quality department and know that quality is as important as functional utility. Here's how the best companies do it, says ASQ.
Thanks to the Internet of Things, hardware developers are undertaking a flurry of potentially lucrative software developments.
After 10 years of evolution, the prototypes of NASA’s Orion “glass cockpit” are finally reaching maturity.
While there are tremendous opportunities in the consumer space for AR, a Juniper Research report says the enterprise AR market will grow tenfold by 2019.
More:Blogs|News
Design News Webinar Series
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 3 - 7, Developing, Testing, and Troubleshooting IPv4 and IPv6 Using Wireshark
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Course August 25-27:
Sponsored by Stratasys
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service