Quelltext anzeigen

== 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