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Playing Around with Sound!

Posted by: Dave Vandenbout in Blog Post 3 years, 6 months ago

The StickIt! AudioIO board has been out for a while, but the current FPGA design example that shows it off is pretty lame: a simple loopback that echoes the audio signal on the input back to the output. In my previous post, I developed a design to take samples from an eight-channel analog-to-digital converter (ADC), store them into SDRAM, and then upload them to a host PC. I decided to take that design as a starting point and modify it to use the AudioIO board for recording and playing back sound. The architecture of the modified FPGA design is shown below. <<more...>>

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Test Results for My First KiCad Board!

Posted by: Dave Vandenbout in Blog Post 3 years, 7 months ago

I talked last time about my move to KiCad and the eight-channel analog-to-digital convertor (ADC) board I used for an initial test of the design software. I submitted the Gerber files to Itead on March 24th and received twenty-four PCBs on April 4th for a total charge of $14 USD. <<more...>>

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My First KiCad Board!

Posted by: Dave Vandenbout in Blog Post 3 years, 8 months ago

KiCad logo I made the decision last year to move from Eagle to KiCad. I got tired of releasing OSHW boards that many people couldn't modify because the freeware version of Eagle was so limited. I also got tired of paying $600 for upgrading to the next major release, especially when the big, new feature was ASCII-encoded design files. Really, that's it?! Hold me back! <<more...>>

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Thanks Bunches for That!

Posted by: Dave Vandenbout in Blog Post 3 years, 8 months ago

BOM-costing ULP screenshot I've written before about my favorite Eagle tool: a pricing ULP that gets real-time prices for parts from Digikey and generates a BOM cost for building a set quantity of boards. Recently, Jorge Ortiz from the Jicamarca Radio Observatory modified the code to remove the restriction of only allowing a single ordering number and value for a part. That was a problem for things like resistors which have different ordering numbers for each resistance value. He even added the capability for specifying multiple manufacturers for a part which is helpful for things like resistors and capacitors. Jorge also found a fast way to go directly to the Digikey web page for a given part and avoid the much slower search function technique I used. <<more...>>

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Re-Organizing the XESS VHDL Library

Posted by: Dave Vandenbout in Blog Post 3 years, 8 months ago

XESS VHDL library organization I recently wrote about my problems that arose when I re-organized the library of VHDL modules that goes with the XESS FPGA boards, so I thought it would be good to show how the library is now structured. <<more...>>

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