Originally Posted by DiverBob
My entry from a few days ago disappeared, must not have gone out correctly. Anyway, I'm off of night shift and am getting used to sleeping during the night again.
I got a new software routine developed where I send the femur (lift) motor the desired angle and the femur moves to that position. I mapped out all the angle ADC values from 35 (minimum angle) to 155 degrees (maximun angle) in 5 degree increments. I plotted the results and they aren't exactly linear. I was unable to develop
I may need to understand this later.....
Originally Posted by jmg
One detail to watch if looking for precision, is the way the DUTY mode works, is it is really Pulse Density Modulation.
The gotcha hiding in PDM, is the tplh and tphl times matter, and any skew will give a change in voltage, especially at large changes in pulse density.
I believe the scope shot in Fig 11 of AN001, is showing such an effect : notice the step at 50%
This is somewhat aggravated by
So, my tried and true HP 6715b laptop that was 4 years old began giving me hourly reminders of it's favorite color: blue. Sad to see it go, (ok, not really), but it was replaced with an HP Elitebook 8560p running Windows 7 64 Bit Enterprise with 4GB of RAM. I also got an upgraded second display; a 23" matte LCD running at 1920x1080 resolution.
This weekend at the Walter E. Washington Convention Center in DC, Parallax will be soldering our fun Scribbler 2 LED Badges. If you have never soldered before this is a great way to get started. Badges are free and our instructional video by Jessica Uelmen, Engineering Manager, will take solderers step by step through the process. Besides soldering, our Boe-Bots will be running around, and the new ELEV-8 Quadcopter will be on display.
If you’re in the DC area, make sure to stop by booth
Updated 04-24-2012 at 09:13 PM by Lauren Davis
Originally Posted by Luis Digital
4 projects, 3 for LPCXpresso (NXP chips), and one for SimpleIDE (Propeller chip).
An example sends the string "Hola", and others receive.
LED blinks when receives the right information, and blink when the transmitter is sending.
Download your copy today, free of charge.