Led Matrix: Unterschied zwischen den Versionen
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For the LED Matrix we want to build on the [[CCCamp2007]] we decided to design a GNU LEDMatrix Controller/Driver setup. It will consist of two parts the FPGA board and a several driver electronics boards. Now almost one year later we're still working on it :) | |||
== Status == | |||
Everything is soldered and it works. We still need to figure out a fast way to get Video data to the matrix. | |||
== Specs == | |||
72x48 pixels totals 3456 blue leds | |||
54 column driver modules (current source). | |||
1 row driver mudule (current sink) | |||
The 8 rows are each connected to a powermosfet and are driven to ground one at a time (so the matrix is 8times multiplexed). | |||
For driving the mosfets we use two Quad-mosfetdriver which in turn are controlled by a 8bit shifting register. | |||
For the columns we take almost the same components except that we have to source current. The mosfets can source up to 250mA but we limit it to about 20mA. | |||
=== Used ICs === | |||
* [http://www.onsemi.com/PowerSolutions/product.do?id=NID5001N NID5001N] MOSFETS for the row driver | |||
* [http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010678 TC4467] used as column driver | |||
* 74HC595 shifting registers | |||
== New MiniITX Board == | == New MiniITX Board == | ||
VIA EPIA-PD | VIA EPIA-PD | ||