{"id":56,"date":"2012-01-18T05:44:20","date_gmt":"2012-01-18T05:44:20","guid":{"rendered":"http:\/\/www.filippeters.com\/?page_id=56"},"modified":"2012-01-18T20:18:52","modified_gmt":"2012-01-18T20:18:52","slug":"blue-cube","status":"publish","type":"page","link":"https:\/\/www.filippeters.com\/?page_id=56","title":{"rendered":"Blue Cube"},"content":{"rendered":"

Led cube, 3mm blue LED’s in a 8x8x8 matrix.<\/p>\n

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LED Cube<\/figcaption><\/figure>\n

I made this in december 2006. avr controller and a couple of i2c chips to drive the anodes.<\/p>\n

The base is made of wood.<\/p>\n

Top plate is a blank pcb, I simply scored lines in it with a knife, drilled holes in the matrix patter, then painted the top. The LED cube was then inserted in the holes and soldered on the bottom side of the circuit board.<\/p>\n

Of course, I could have made the whole circuit in smd on that board, but for one-off projects like this I prefer to use boards with holes and wire everything up. Microcontroller circuits like this are so simple you do not really need a schematic to understand it, just the data sheets for the specific ic’s.<\/p>\n

\"\"<\/a>\"\"<\/a>\"\"<\/a><\/p>\n

This is made with an Atmel Mega8. I used avr gcc, and avrlib for the i2c routines. It was very easy to get this working with avrlib. I still remember when I made my mp3 player with an 6811F1, also with gcc, I had to write my own i2c routines, and even an assembly startup file.<\/p>\n

The columns are driven by 4 SAA1064 ic’s. Normally these are used to drive 4 digit displays, but they can also be used as 16 current sink’s, with current control. I prefer current controlled drivers for LED’s instead of resistors. A bit more uniform led control, and you can modify the current setting in software.<\/p>\n

Row’s are handled by \u00a0a 74hct138, driving 8 mosfet’s.\u00a0One button on the back to choose between different patterns, or cycle between patterns.<\/p>\n

 <\/p>\n

Only a couple of patterns were made, the most interesting ones were “rain”, “flock” and “game of live”. Patterns with randomness are always interesting…<\/p>\n

And for people interested in some code:\u00a0blueCube Source Code<\/a><\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Led cube, 3mm blue LED’s in a 8x8x8 matrix. I made this in december 2006. avr controller and a couple of i2c chips to drive the anodes. The base is made of wood. Top plate is a blank pcb, I simply scored lines in it with a knife, drilled holes in the matrix patter, then … Continue reading Blue Cube<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":26,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"sidebar-page.php","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-56","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P292Q1-U","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/pages\/56","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.filippeters.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=56"}],"version-history":[{"count":4,"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/pages\/56\/revisions"}],"predecessor-version":[{"id":73,"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/pages\/56\/revisions\/73"}],"up":[{"embeddable":true,"href":"https:\/\/www.filippeters.com\/index.php?rest_route=\/wp\/v2\/pages\/26"}],"wp:attachment":[{"href":"https:\/\/www.filippeters.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}