Building My Own Oscilloscope

[Mark R]

I must say this is one serious undertaking, but looks brilliant.

cheers Mark

[Miguel López]

Here you can see some pictures of the sawtooth that I have got. I did some minor changes that I will explain later.

You can also download a short video from this link:

http://www.ziddu.com/download/21115015/D...7.AVI.html

In this video I show how the sawtooth frecuency varies by moving the pot RV47

[Yorkie]

You must be very pleased with the progress Miguel - thanks for posting the link to the video clip - I hope that the argument going on was the TV set in the background!

[Miguel López]

I hope that the argument going on was the TV set in the background!

Oh yeah!! My wife was watching a Brazilian novel. We have an all-in-one room. In the bedroom there is our bed, out TV and my bench. Not really too many space.

[Miguel López]

Here the small changes I did.

1.) I used -500V (instead of -600V) DC for the supressor grid circuit. This was the optimal value for max sweep length. Above this value it didn't oscillate.

2.) I used 47pF and 23.5pF for C11 (instead of 30pF). It worked fine with both values, but with 23.5 (two 47pF in series) the flyback sweep is more sharpen.

3.) I didn't used a potentiometer for RV47. Instead I used a resistive divider of the same value than the pot. I change the value ssevral times to simulate the movement of the pot, and I noticed no important changes in the trace length.

This weekend I got a sweep of 50uS. My most ambicious goal it to get a sweep of 10uS, but I'm very happy with my achievement till now.

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There is a mistake on post No.12 . I wrote RV47 instead of RV44. The correct pot to change the sweep frequency is RV44.

[Yorkie]

The progress you have made is amazing Miguel, given that you don't have a ready source of components, and the circumstances in which you are having to work are far from satisfactory. It just goes to show what can be achieved with enthusiasm and commitment. I don't think many people would say to themselves "I don't have a workshop, I can't easily get hold of components, I know what I'll do - I'll design and build an oscilloscope". But you did, and the results are clear to see!

[Miguel López]

Happy New Year 2013 !!!!!!

I want to share my advances on the scope.

[Ed_Dinning]

Hi Miguel, you have been busy over the Xmas, it will look like a professional scope when finished.

Ed

[Bushbaby]

Great work Miguel, you'll have a very professional looking oscilloscope at the end of your project.

Well done.

Regards

Rob

[Mark R]

Looking really good is that Miguel!

cheers Mark