Post Created date
1-wire (or I2C) to USB bridge
pnp wrote:There used to be a dedicated USB to 1-wire from Maxim, but they made it practically obsolete, not sure why: With kernel support too...
Monday, 12 September 2011 - 10:39
Math Functions
@a.mlw.walker, 1. What sort of sensors do you have? 2. What is the curve that you are trying to fit, and why? 3. How many samples are you using to fit the curve? We need to...
Sunday, 4 September 2011 - 22:51
Real Accelerometer
Rivello wrote:damien_d wrote: It's likely a complementary filter. In truth, it uses a kalman filter :wink: It's said in the description. Well, I'm not going to dispute the...
Monday, 29 August 2011 - 05:04
Real Accelerometer
DocJC wrote:Freak Rivello has an interesting YouTube video demonstrating a Self Stabilizing Platform , which seemed appropriate to mention in this thread. He mentions using both...
Monday, 29 August 2011 - 03:20
Open source - Avr Gps Datalogger
brunomusw wrote:Hey freaks... Does anyone know some open source Gps - datalogger based on Avr? Or other non Avr based? Or non open source? SparkFun might have what you are looking...
Sunday, 28 August 2011 - 23:00
Real Accelerometer
dr.mike wrote: Those "+c" terms add up fast ( and compounded ). Errors in position compound with: 1. gyro_bias * time^3 2. accel_bias * time^2 Unless you **precisely** know these...
Saturday, 27 August 2011 - 01:39
Real Accelerometer
This is somewhat an academic argument, but... There are several modes where one cannot tell whether the platform is accelerating, or whether it is rotating and accelerating. It is...
Saturday, 27 August 2011 - 01:34
Real Accelerometer
polecat wrote:At least on the system we used. IIRC the gyros were used to keep the platform level so the accelerometers were oriented correctly. ( I hope this is right ) I haven't...
Thursday, 25 August 2011 - 23:24
Real Accelerometer
ka7ehk wrote:If you can pay hundreds of currency units, you have much better odds. Jim Try tens (or hundreds!) of thousands of currency units. Accelerometers have a whole range of...
Thursday, 25 August 2011 - 23:18
Need some driver ideas
A 4 to 16 decoder (or even a 3 to 8 decoder) will do the trick to expand the number of ports you need, but you'll need some FETS or something to actually switch the power. --...
Tuesday, 23 August 2011 - 23:53
Change in GPS data format
$PMTK010 is some kind of proprietary message. The NMEA standard allows proprietary messages in the $Pxxxxxx format. Manufactures use them for device-specific information, or to...
Monday, 22 August 2011 - 01:33
AVR to Ultrasonic transmitter weird results
One trick I've seen is to hook up the ultrasonic trandsucer through a MAX232 which are generally plentiful and cheap through hobby electronics stores. -- Damien
Sunday, 21 August 2011 - 02:43