Sunday, September 14, 2014

Crystal Filter

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The post yesterday delivered my bag-o-rocks from China.  I ordered on eBay 100, 20 Mhz surface mount crystals for building crystal filters. ...
Tuesday, September 9, 2014

Updated PCA9546 library

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As mentioned in a previous post , I have updated the PCA9546 library in order to fix the problem of one of the methods of the class being im...

Minima Controller - 5V i2c LCD support

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I have tested my Minima controller successfully for support of 16x2 or 20x4 LCD displays using a 5V i2c backpack .  Here is a 20x4 display r...

Minima Controller - OLED Display

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After some initial head scratching, I have my adaptation of the Minima sketch that supports my OLED display up and running on my controller ...
Monday, September 8, 2014

Minima Controller Shield - Some measurements

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Last evening I placed my second Si570 on my Minima Controller shield and am pleased to see it is functional as well. The datasheet for t...
Sunday, September 7, 2014

Minima Controller Shield programming

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UPDATED: As was intended, programming of the controller shield is trivial.  A single additional class was required and no changes to other...

Minima Controller Shield checkout

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UPDATED: My Minima controller Arduino shield checks out as functional.  With two Si570 devices on the board, powering them from the Arduin...
Saturday, September 6, 2014

Minima Controller Shield Build

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I have completed (as far as I went) the build of my Minima Controller Shield, but have yet to complete testing of the board.  I populated on...
Thursday, September 4, 2014

Small Progress on the Minimal Controller Shield

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I had a little time this evening to start stuffing my prototype Minima controller board with parts.  Got the Si570, voltage regulator, reset...
Tuesday, September 2, 2014

Direct Digital Synthesis (DDS) Part 2

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Continuing on the theme of DDS in software, my previous post  illustrated a simple audio sinusoidal generator using DDS techniques.  I promi...