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Random electronics projects

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p3lb0x:
So, I recently started Uni and have been doing a bit of this and that with my Atmel prototyping board using a AtMega32 µC. One of things I made with some of the assignments we've gotten so far is a small simple square wave synthesizer like thing. Has anyone else done similar small electronics projects? I am correctly dabbling in buying 6 5X8 LED dot matrixes to redo the charlieplexing display I made in high school. So yeah, any of you guys done similar things?

The small synthesizer like thing I made using the Uni-required STK500 prototyping board (An exercise in assembly):


My old charlieplexed 8x7 LED display (Written in terrible amateur C):

ewemoa:
Just beginner-level Arduino stuff here -- just connecting LEDs, wires, etc. on breadboards at this stage.

Curious how the following is going to turn out:

  SmartScope

Do you have access to an oscilloscope?

Edvard:
...
Curious how the following is going to turn out:

  SmartScope
-ewemoa (September 29, 2014, 08:01 PM)
--- End quote ---

WANT!!

I have an old Heathkit scope I bought at the Goodwill.  It works, but has a time-machine glitch in it (the tops of the waveforms tend backwards) and I haven't found a manual to adjust it yet, but really I would like something to replace it that doesn't cost a million bucks.  Been saving my pennies for this:
http://www.seeedstudio.com/depot/DSO-Nano-v3-p-1358.html



I never thought that maybe an Arduino with a display could do the basics, but it looks like some folks have done it:
http://www.instructables.com/id/Girino-Fast-Arduino-Oscilloscope/
http://www.instructables.com/id/Arduino-Oscilloscope-poor-mans-Oscilloscope/
http://www.instructables.com/id/Arduino-Improved-Poor-Mans-Oscilloscope/

For simple audio signal tracing, I've used Xoscope to good effect:
http://xoscope.sourceforge.net/


I've done audio equipment repair in my youth, and tried my hand at designing guitar sound effects units (stompboxes), but never really went anywhere with that.  I have an arduino, and am fascinated by what others have done with it, but I'm having trouble coming up with my own ideas for it.
 :-[

ewemoa:
I have an old Heathkit scope I bought at the Goodwill.  It works, but has a time-machine glitch in it (the tops of the waveforms tend backwards) and I haven't found a manual to adjust it yet,
-Edvard (September 29, 2014, 09:22 PM)
--- End quote ---

I don't suppose there's anything relevant here:

  http://www.vintage-radio.info/heathkit/


Thanks for the links -- some interesting stuff there.  Saw something about BitScope on the xoscope page -- might take a look at that later.

p3lb0x:
I am personally using Digilents Analog Discovery, it's a USB oscilloscope, arbitrary waveform generator and 5v power supply. It also has like 12 16 I/O ports. It's a bit expensive though, but thinking about how expensive most normal oscilloscopes are, it's pretty affordable.

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