Jack Gassett
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Flavia: the Free Logic Array
Check out this amazing project from John Beetem. Make small Digital Logic designs without the heavyweight vendor tools. Flavia tool chain lets you make bit files for the Papilio One 250K with completely FLOSS software! Only CPLD sized designs are possible, but this is a boon for learning Digital Logic on ARM based boards like…
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Hamster’s HDMI Input Wing in Action!
Check this out, this is really cool. In this video Hamster grabs HDMI input from a special Wing that he designed and then converts it to 8-bit VGA format so he can send it out of the 8-bit VGA port of the LogicStart MegaWing! Take a look at this video of it in action: http://youtu.be/AvHPYmEQb04 Find…
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Why Oscilloscope Bandwidth Matters
This is a great article about why Oscilloscope Bandwidth matters. If you are looking to buy a new Oscope soon then give this a read. Thanks Adafruit! The most obvious factor when choosing an oscilliscope is bandwidth. 50MHz is better than 20MHz, and 100MHz is definitely better than 50MHz, etc., but what does that number…
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A CPLD Video Card With VGA And NTSC
Here is a project to generate VGA and NTSC from a CPLD. The brains of the outfit is a $5, 100-pin CPLD from Xilinx. Apart from that, the rest of the components are a crystal, PLL, and an almost hilarious number of resistors for the R2R ladder. The one especially unique component is the 25.056815 MHz…
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Retrocade ADC Demo project for PlanAhead
Papilio community member “Offroad” put together this nice little ADC demo for the RetroCade Synth. It puts the ADC chips through their paces and includes a PlanAhead project and source code. Anyway, one result is an ADC demo that got out of necessity a little more polished than planned. Controls LED…
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Intelligent LEDs – Using WS2812B LEDs with the Papilio.
Hamster shows us how to use the latest and greatest WS2812B LEDs! The interface is pretty simple – the state of the bus has to be reset by holding the data signal low for 50us, followed with sending out 24 bits for each LED that is connected in the string. The ‘1’ bits are sent…
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DIY: build your own oscilloscope
Check out this cool FPGA project to make a DIY oscilloscope done for a school project. Nicely done! We( Haolin and Joris ) built this oscilloscope last semester for a school project. The ADC chosen is a high performance differential ADC which uses Low-voltage differential signaling (LVDS). A FPGA is used to interface the ADC accounting…
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PLIP August 2014: Soft Core Processor with ZPUIno / ZAP / Papilio
Colin O’Flynn makes a cool video showing the ZAP IDE in action! Watch as he makes a custom PWM peripheral, adds it into the ZPUino Soft Processor, and writes C code to control it. Jump to 37:10 mark to see it working! Full details at http://programmablelogicinpractice.com in August 2014 Issue of Circuit Cellar. Code is…