Parralax Oscilliscope
I have just started tinkering w/ the "Understanding Signals" project book and oscilliscope.· Unfortunately I cannot even get past the first or second ·exercises.· My laptop recognizes the oscilliscope, I have input the BASIC program and downloaded it to the stamp (Homework Board) successfully, but no signal is recognized by the oscilliscope.· I feel I have done my due diligence in re-checking the the connections, settings and BASIC input,·does anybody have any ideas regarding troubleshooting this crazy thing?
Comments
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Chris Savage
Parallax Tech Support
csavage@parallax.com
I had a similar problem.· I had to close the Optoscope software, then load the Basic Stamp software.· Once I got the computer to recognize the Basic Stamp, I re-opened the Optoscope software and it worked fine.· Make sure you do not have your PDA software active, this causes real problems.
Bill
Mr. Savage,
Yes, I do have the "green light" indicating that the·software has recognized the scope. Yes, I have calibrated the l probes.
Mr. Green/Mr. Savage,
I am stuck on the first exercise in the "Understanding Signals" book.· I have entered the BASIC code and downloaded it to the stamp. I have the black lead connected to the Vss and the blue lead connected to pin 14.·
Mr. Plano,
I will make sure my pda software is not active.· So you load the code on to the stamp, then close the stamp software and start up the Optascope software to get a reading?
Thank you
Harry
·· Are you running the BASIC Stamp Program that is part of that Activity?· If you plug the Blue lead from P14 into Vdd do you see the line on the Scope go up?
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Chris Savage
Parallax Tech Support
csavage@parallax.com
I apologize for not getting back to you sooner but, life gets in the way. I tried connecting the blue lead directly to the Vdd on the homework board but still had no detected signal on the screen.
I recently moved and my stuff just got here so I'll dig out my multimeter and tell you what voltage I get from the Vdd & pin 14.
If you're just trying to test for a constant voltage, make sure the Trigger Mode is set to Auto and Run/Stop Mode is set to Continuous. Then click the Run/Stop button. Do you get a blue line on the screen at all?
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OS-X: because making Unix user-friendly was easier than debugging Windows
Thanks
Harry
In the vertical scale section (the lower-right corner of the window) what color is the "led" next to the blue CH1 button? If it's black, you haven't enabled CH1 and you'll see nothing. Click the CH1 button to make the led green.
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OS-X: because making Unix user-friendly was easier than debugging Windows
i post this just to say than parallax scope is very great for is price exepting from my own experience than eatch time i turn a session on i need to switch my "single acquisiion-continous acquisitions" several time up and down before he starting to plot.
Maybe it's a little help for you?
Michel
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Regards from Belgium,
Michel Dechief.
Engineer and professor at Brussel's university (artificial intelligency)
Danke, auf wietersehen
Sid
Nate
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OS-X: because making Unix user-friendly was easier than debugging Windows
Thanks
It is a handy little thing to take along on service calls, using the laptop I need anyway. I would like to design some probes for AC and higher voltages. Input impedance and capacitance would help.
Post Edited (Baer) : 10/24/2006 11:37:56 AM GMT
The·scope·input impedance is 1M, so if you wanted to create a 10X probe you would put a 10M resistor in series with your input. Capacitance should be around 10pF. I hope this helps. Take care.
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Chris Savage
Parallax Tech Support