I wanted to update some new posts to my weblog ... of course, it's all about electronics 😊

AIS...!

This circuit board converting AIS audio signal (from VHF radio) to Serial (RS232) so it could be use with PC or chartplotter to monitorering ship traffic. For more information about AIS and audio signal, look at here: http://www.discriminator.nl/index-en.html

I have taken this work from:
http://www.tekmanoid.com/ais.shtml
There you can find all other things about this work (schematics, components list, Hex code, etc.)
With many thanks to Alex, who gave me permission to make this work.

The LED scope schematics

Here I post the original schematics of LED oscilloscope, there are a few mistakes regarding to some ICs +/- connections, and also at the connections from U3, U4 toward U6 and U8 which they not make any sense!
I did not had time to check these mistakes, so please look for your self before you connect any power source to the circuit. If it is too confusing, you can always email or PM me here, I will try to help ASAP.

U1 LF353 (op amp) didn't work for me, I had to change it with some other op amp ICs, like LM1458/1558 or LM158/258/358 which all are Pin compatible with LF353.

Edit: (20-05-2012)
Finally I find some time to fix all the mistakes at the schematics, and I hope that all are OK now. If you
find a new mistake please send me a message so I could correct it. Thank you for your attentions.

Remember that, the original schematics are for 9 x (5x7 LED module) 15 vertical (rows) x 21 horizontal
(columns) LEDs, where my scop has 6 x (8x8 LED modules) 16 vertical (columns) x 24 horizontal (rows)
LEDs (as this schematic are now)

LED Oscilloscope

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For sometimes ago I have made a LED Oscilloscope and after awilde I made a (not quite good looking) short video for broadcast on the Youtube, as you can see it here.
I have got some comments at the Youtube, which has asking about the Schematics for this project. I have to say that I have got these schematics from a friend and I also made my own adaptations and some other changes to them... that's why I will try to draw some new schematics with all my changes and adaptations, and for all you who like to make this LED Oscilloscope, look at the next post!

                                 

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The Forrest Mims

The Forrest Mims circuit book
The Forrset Mims book has some circuit about LED Oscilloscope, the idea for making a LED oscilloscope has generally come from his circuit.
Here is a link for his circuit scrapbook, volume 1, from Google





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