Comments on: Arduino Pin Speed (Multiplexing) http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/ Benjie Gillam's blog, and home of MythPyWii - probably the best Wii remote (Wiimote) interface to MythTV - see sidebar. Fri, 25 Jun 2010 06:25:38 +0000 http://wordpress.org/?v=2.8.5 hourly 1 By: Mat http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-10186 Mat Wed, 27 Jan 2010 20:00:58 +0000 http://www.benjiegillam.com/?p=224#comment-10186 Good work, Charlieplexing would reduce further the number of pins needed. I'm not sure if you can do it with an arduino. Probably worth further investigation. Also thanks for the link to the 8x8 led matrix, I've wanted some of these for ages but didn't know anywhere in UK to buy them! Good work, Charlieplexing would reduce further the number of pins needed. I’m not sure if you can do it with an arduino. Probably worth further investigation.

Also thanks for the link to the 8×8 led matrix, I’ve wanted some of these for ages but didn’t know anywhere in UK to buy them!

]]> By: Benjie http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-7508 Benjie Fri, 02 Oct 2009 15:24:42 +0000 http://www.benjiegillam.com/?p=224#comment-7508 Cool :) Did you have to boost the output of your flop flops? Mine only output 4mA which is not really high enough for an LED! Cool :) Did you have to boost the output of your flop flops? Mine only output 4mA which is not really high enough for an LED!

]]> By: Rob http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-7507 Rob Fri, 02 Oct 2009 15:11:57 +0000 http://www.benjiegillam.com/?p=224#comment-7507 Good experiment, I did something similar a while ago with a PIC16F628 and 2 octal flip flops. There is a video of it here: http://www.youtube.com/watch?v=opsSAFlkIjw I have an Arduino board now and I love programming with it. The good thing is that you can program it in a high level language (C/C++) which makes it a lot easier to learn but you do miss out on some of the lower level control offered by assembly language as you discovered with the port control. The good thing is that you can dig deep into the underlying code and access the low level functions. I'm currently playing around with an LCD module and I'm hoping to hook it up to the Internet so I can display information on it. Good experiment, I did something similar a while ago with a PIC16F628 and 2 octal flip flops. There is a video of it here: http://www.youtube.com/watch?v=opsSAFlkIjw

I have an Arduino board now and I love programming with it. The good thing is that you can program it in a high level language (C/C++) which makes it a lot easier to learn but you do miss out on some of the lower level control offered by assembly language as you discovered with the port control. The good thing is that you can dig deep into the underlying code and access the low level functions. I’m currently playing around with an LCD module and I’m hoping to hook it up to the Internet so I can display information on it.

]]> By: Benjie http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-7069 Benjie Fri, 18 Sep 2009 16:19:19 +0000 http://www.benjiegillam.com/?p=224#comment-7069 Quite possibly, but if I had used an oscilloscope I wouldn't have bothered digging deeper into the internals of Arduino, which would have been a shame. Quite possibly, but if I had used an oscilloscope I wouldn’t have bothered digging deeper into the internals of Arduino, which would have been a shame.

]]> By: Jasper http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-7067 Jasper Fri, 18 Sep 2009 14:16:59 +0000 http://www.benjiegillam.com/?p=224#comment-7067 This looks like the kind of thing that an oscilliscope would be useful to have for debugging with. This looks like the kind of thing that an oscilliscope would be useful to have for debugging with.

]]> By: Benjie http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-6777 Benjie Wed, 09 Sep 2009 09:09:17 +0000 http://www.benjiegillam.com/?p=224#comment-6777 Thanks for this Al! I'll get a couple when I get a load of PNPs to control the +V side of things (I think the chip you linked to is a sink rather than a source). Unfortunately I'd have to use two - my experiment above shows that I can't power all 16bits from one Arduino pin (too slow) but it would certainly make my circuit a lot tidier! Thanks for this Al! I’ll get a couple when I get a load of PNPs to control the +V side of things (I think the chip you linked to is a sink rather than a source). Unfortunately I’d have to use two – my experiment above shows that I can’t power all 16bits from one Arduino pin (too slow) but it would certainly make my circuit a lot tidier!

]]> By: Al http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-6764 Al Tue, 08 Sep 2009 21:41:34 +0000 http://www.benjiegillam.com/?p=224#comment-6764 Cool post Benjie Another possibility is to use a couple of SPI based LED drivers like these : http://www.rapidonline.com/netalogue/specs/82-0126e.pdf (you might have to use 3 transistor to control the 3 x multiplex) Its a good inexpensive cheat regards Al Cool post Benjie

Another possibility is to use a couple of SPI based LED drivers like these :

http://www.rapidonline.com/netalogue/specs/82-0126e.pdf

(you might have to use 3 transistor to control the 3 x multiplex)

Its a good inexpensive cheat

regards
Al

]]> By: Howto: Arduino Pin Speed (Multiplexing) « SoutHACKton http://www.benjiegillam.com/2009/09/arduino-pin-speed-multiplexing/comment-page-1/#comment-6763 Howto: Arduino Pin Speed (Multiplexing) « SoutHACKton Tue, 08 Sep 2009 21:33:24 +0000 http://www.benjiegillam.com/?p=224#comment-6763 [...] Read the rest of this entry on about:benjie » Comments (0) [...] [...] Read the rest of this entry on about:benjie » Comments (0) [...]

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