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1  Community / Exhibition / Gallery / Re: Another Keyboard Encoder on: May 31, 2011, 05:55:31 pm
FalconFour, Thank you for your time in helping me with better part selection. Do you mind if I work your price list into the document?  I had no production in mind just a one or two time project.  All of you guys are great in response.
2  Community / Exhibition / Gallery / Re: Another Keyboard Encoder on: May 31, 2011, 05:47:18 pm
KE7GKP, Thanks for your input.  I have no intension on manufacturing and selling this.  I needed a keyboard interface for my Arduino and did not find one to meet my needs.  I just want to share this for food for thought.
3  Community / Exhibition / Gallery / Re: Another Keyboard Encoder on: May 31, 2011, 05:39:42 pm
CrossRoads, The only reason I used the LCD to display the output of the keyboard is that I designed this keyboard for my bench buss for my Arduino.  It could be easily converted to serial.print();  Maybe it would make it simpler.  Thanks for your suggestion.
4  Community / Exhibition / Gallery / Another Keyboard Encoder on: May 31, 2011, 09:24:52 am
I have made a serial keyboard interface I would like to share with others. I would like to know what eles this project could use to make it better.  
Please see the attached PDF file
Thanks

5  Development / Other Hardware Development / Re: Serial Keyboard Encoder on: May 31, 2011, 07:41:16 am
The PDF document has been updated to include cost
6  Development / Other Hardware Development / Re: Serial Keyboard Encoder on: May 27, 2011, 04:36:39 pm
Thanks liudr, This is exactly what I am looking for.
7  Development / Other Hardware Development / Serial Keyboard Encoder on: May 21, 2011, 01:05:41 pm
I have made a serial keyboard interface I would like to share with others.  I do not know where on this sight to put the project and I would like to know what eles this project could use to make it better.  Thanks

Price List Added  05-31-2011
8  Forum 2005-2010 (read only) / Interfacing / Re: Using Arduino to Digitaly Filter Audio. on: September 15, 2010, 03:30:20 pm
Would you like to see supporting documents?  I have sipply offered my input.  
9  Forum 2005-2010 (read only) / Interfacing / Re: Using Arduino to Digitaly Filter Audio. on: September 15, 2010, 08:20:15 am
Hi!
There are several ways you can achieve this.  First you need to know how tight you want the band pass filter.  RC band pass filters are the widest band pass.  LC filters will perform at 12dB per octave.  Active filters (using OP amps)  can achieve ever closer bandwidth 24dB per octave.  You could use an OP build a band pass filter with several resistors and capacitors switched in and out by using a bi-directional switch such as a 4066.  This type of switches has on and off line for each switch.   The control lines for each switch are TTL compatible

I cannot figure out how to attach files to this.  If you are interested let me know and I can e-mail you documents with schematic on each type of filters.  

As a thought, I am planning on experimenting with analog in and analog out lines and filtering areas out by programming the 328

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10  Forum 2005-2010 (read only) / Interfacing / RTC DS1307 Communications on: August 17, 2010, 04:35:41 pm
I have the electronic Brick with the 1307 on it.  It is working and I am using Analog i/o pins 4 and 5.  Making a data collection system and need all 6 analog ports if possible.  Is there another way to communicate with the 1307?  Using an Arduion Duemilanove.
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