Search found 4 matches
- Wed Oct 20, 2010 12:26 pm
- Forum: Computer Programming
- Topic: USB to serial dongle for Linux
- Replies: 2
- Views: 2755
USB to serial dongle for Linux
An associate has a laptop running Linux. The computer has 4 USB ports and she needs a serial output. She purchased a dongle at Radio Shack and she doesn't think she needs a device driver. I've been telling her that from my experience with Windows, you need to have a device driver on the computer to ...
- Thu Aug 05, 2010 7:38 am
- Forum: General Discussion
- Topic: Calculating the passband ripple of a filter
- Replies: 4
- Views: 2534
Re: Calculating the passband ripple of a filter
Let me describe a bit more about the filter. It is a lowpass butterworth filter using a flattest amplitude response, with a cutoff frequency of around 50Hz. We collect force data from load cells on subjects, so want as little noise being introduced by the filter as possible. We use a 16 bit A/D boar...
- Wed Aug 04, 2010 6:31 pm
- Forum: General Discussion
- Topic: Calculating the passband ripple of a filter
- Replies: 4
- Views: 2534
Calculating the passband ripple of a filter
I've created a hardware lowpass filter using an LM348 op-amp and would like to measure the amount of passband ripple, or noise being generated by my filter, compared to an unfiltered signal. Here is how I am thinking of doing it: > Collect two channels of data, one channel is unfiltered and the othe...
- Sun Jun 20, 2010 4:42 pm
- Forum: General Discussion
- Topic: Using webcams as security cameras
- Replies: 7
- Views: 4510
Using webcams as security cameras
Hi everyone! I'd like to install some webcams around the windows of my home. Maximum number would probably be around 8. My ideal arrangement would be to have each webcam be able to collect images at a specified interval, and each webcam could save those images into a different folder. The image data...