Hi, I have questions with electronic filters. Based on DPRG, they say "it's another world of electronics" and so most DPRG members don't know abut it. I can...
You can use a SPICE simulator to determine the behavior of a circuit, especially filters of all kinds. All of the big semiconductor companies offer free spice...
 I have two gyros and a 3D accelerometer. The accelerometer is mounted such that its x-y plane is horizontal. One gyro is mounted in the x-y plane and the...
Thomas D. Dean
tomdean@...
Aug 2, 2008 4:59 pm
36596
Sorry about the chopped up message. Don't know how that happened. I have two gyros and a 3D accelerometer. The accelerometer is mounted such that its x-y...
Thomas D. Dean
tomdean@...
Aug 2, 2008 5:06 pm
36597
Hi all, I'm following you from many time and I really appreciated your discussions. I'm in front of the problem of outdoor positioning of an unmanned robot, ...
Hi I've got a small PBC design that uses a handfull of (7) surface mount chips and a few through hole devices (switches). I've hand-built a few prototypes, but...
On Sun, 03 Aug 2008 13:16:17 -0000, "Phil Malone" ... Phil, They can all do gerber - its the standard. If you find something, please let me know - I make SMT...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SeattleRobotics group. File :...
SeattleRobotics@yahoo...
Aug 3, 2008 3:42 pm
36601
It must be summer, as the chat has been quieter then normal lately. Come help liven it up! :) Richard irc://irc.freenode.net/#SeattleRobotics The link above...
Looking for suggestions on how to get date & time in machine readable format out of a hacked cell phone. The application is a sensing project where the unit is...
Well, if all you want is a time bomb, why bother with a cell phone? And considering that most of the major threats now seem to be from people that have strong...
Now, here is a slightly technical question for someone that might know the answer. You can't get a much more robotic related question than this. I am looking...
Is this what you are looking for? http://en.wikipedia.org/wiki/Euler_angles tomdean...
Thomas D. Dean
tomdean@...
Aug 5, 2008 4:38 am
36608
Not exactly. The beta angle is the rotation angle about the new y-axis after a rotation about the original x-axis, by gamma. This derivation here shows that...
how big is the piece of equipment you are trying to place this on? and, if you can answer, why do you need .5 meter location information? ... From: "Giacomo Di...
the accelerometer is rate over time. you need a steady reliable reading at a known time interval for this to be useful. the xsence XTi is a better option for...
Hi Thomas, I'm not sure if you're trying to measure an angle lying on a plane on which the "gravity vector" also lies on. (Like a balancing robot would). It...
... It is a zero turn hydrostatic lawnmower, i'm aiming at replicating recorded paths; enhancing precision would help in limiting overhead and to avoid...
OK, so I know I'm opening the "battery discussion," but it's been a while, so why not?! What's the best way to treat NiMH batteries to get the most overall ...
As with NiCd cells, so it is with NiMh cells, heat is your enemy. A delta-peak charger is a good bet, if you really want to be careful then you use a...
I guess I missed the point of your question. Late night. You have a matrix, 3x3, of values and you want to extract the Euler angles? What is the basis?...
Thomas D. Dean
tomdean@...
Aug 5, 2008 5:23 pm
36617
Has anyone played with the OBD-II port on their car? Specifically, I'm looking for info on the protocols for the ISO 9141-2 electrical connection and the SAE...
Cathy, Look into the "ELM" chip, just google it up. Sorting out the protocol yourself will be time consuming and this chip does a fine job. I made a error code...
Hi Cathy, Check out the ELM327 at http://www.elmelectronics.com/. It's an ASIC that handles all the low-level protocol stuff. Kinda spendy, but makes things a ...
Hi Cathy, Yes, I have, but several years ago. I developed a program to run on Interro's Hand held automotive test computer. An interface module had already...
"What's the best way to treat NiMH batteries to get the most overalllong-term useful life from them?" 100% charge is ok. Like any battery the worst enemy is...
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