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1  Using Arduino / LEDs and Multiplexing / 7segment displays with max7219 chip counting on: April 08, 2011, 06:08:17 am
hello all,

i have just started using arduino from various other C based controllers and have a uni project that im trying to sort out asap.  i have 2 7segment displays mutiplexed up and working fine, but im trying to work out how i can have a potentiometer connected to control the digits that have been displayed.  The hardwear works fine its just my coding abilities that i am having trouble with. In fact i have no idea how to start. 
any help would be gratefully appreciated

cheers
   
adknott
2  Using Arduino / General Electronics / Re: MAX7219 and higher voltage LED displays - how? on: April 07, 2011, 03:21:30 pm
this is a really helpful thread, although im struggling to get my head around what the different chip are that have been used.  like you i have used a max 7219 chip and have got the prototyping board all sorted out using 2 or 3 smaller seven segments.

Now im trying to move onto the larger displays and they are not bright enough.  What were the chips that you have used to allow for a greater voltage to power the display?

any help would be greatly appreciated. cheers
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