Cutting down on the noise was my main concern on my power lines. I tried some 47 pF (as suggested by someone) caps on one motor to see its effect. The spikes...
HI Jim, ... I normally use 0.1 uF (100,000 pF) or 0.01uF (10,000 pF). I'd imagine 0.047 uF would also work fine (47 nF). With motors like the solarbotcs...
Hi Jim, In dealing with EMI, It is tempting to focus on voltage spikes; this is natural, since these spikes are the first thing you notice when scoping a...
Just to clarify a tad: those big caps need to go as close to the switching circuit (H-Bridge) as possible: it is the wires between the power and the motor...
I just had a thought. (That happens every now and then but I try to keep that sort of thing to a minimum.) I had a project where I had to generate wave forms...
Packaged crystal oscillators are usually pretty clean; they are designed to be used next door to microprocessors, after all. I would just follow whatever app...
Hello Jim, Knocking down noise caused by the primary switching of a power driver is significantly different than the application of snubbers quiried in the ...
Fellow SRS'ers I'm working on a RoboMagellan robot and we are attempting to have a microcontroller read the TTL-level Serial data from a NEMA gps receiver and...
So, you want the setup: GPS --[raw data]--> microcontroller --[decoded data]--> microcontroller --[lots of data]--> laptop Am I correct? Just about any micro...
Mike, Did you ever find what you thought was a good solution to your objective? I followed the different options noted and they seemed pricey-unless you can...
I was in the same situation. My robomagellan uses a Mini-itx computer. I needed to serially talk to GPS, Camera, motor control uC, and a sensor reading Uc. My...
I don't understand why you want to have two micros before the laptop, ... I assume you meant to say the protocol *is* figured out. What is that protocol?...
... Yes, that is exactally it. Our system is very modular. For example the high level micro sends a speed/distance command to the micro that runs the motors....
I've found the best way to learn about a micro family is just to browse around the manufacturer's website and read the datasheets. I've heard great things...
I'm using a PIC18F6722 for a motor control project. It has two independent I2C channels and two USART channels. I have not used the secondary I2C channel or...
Hi all, Can anyone direct me to a a simple and maybe free plotting program that I can use to send my data direct from my microcontroller to the screen for...
Hi Chris, ... I haven't used it, but gnuplot should work. http://www.gnuplot.info/ -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/...
Awsome. I need the same sort of thing for PID tuning. So far I have had to save to a text file and then plot it in Excel. I should just write something up in...
Another one is StampPlot. On the surface it appears to be just for the Basic Stamp but in reality the microcontroller's program just sends strings out the...
It's been awhile since I looked at it, but for time series data I've found GNU Plot a little frustrating. In particular it only understood how to plot...
Hello everybody, I am going to measure steering wheel rotation using a small rotary pot. I am looking for a small "friction disk"(?!) that can be mounted on...
How about G-Term? It is a simple terminal program with a graphics window at the bottom. The in the configuration menu the user enters a character to monitor...
StampPlot is pretty cool. But this one seems a lot easier to use for what I have in mind. Thanks!! Side note. Any Idea what simple program would be good to...
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