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 Now online (1)giginger ...and 111 guests Last 5 registered Oplandisks nothingstar N_loop yipe foxtrotromeo Browse members... |
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Members 8025Messages 2613457 Today 3 Topics 127500 |
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watched it already, thanks! here's what i did with 1 shift register: |
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lol, your desk looks just like mine. i have my arduino but with flashing green leds in front of me : ). cool . wow you hooked up an ic. nice n neat. im making a 9x9 multiplexer , 81 led outputs from just 9 pins. they will all be able to latch on/off at the same time ,so no flicker. you've probably seen this.: but if you need loads more outs. |
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I only use it to make detonators. |
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Yes I've seen it but it looks more complicated than using a chip :) I just published the article about the shift register if you wanna read it :) |
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very nice. : ) so you send a series of logic 0's/1's to the chip and it then outputs a specific led? cool., I wonder, can you put another of these on 3 output's of the first one? Would it just be a little slower to react , the more you add. cool work, wish i had looked at a shift register first, but i'm half way through something so i'm going to make a printed circuit board for a 9x9 multiplexer, and see how small i can make it. : ) |
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dunno if you can chain multiplexers. doesn't seem impossible but this wouldn't be a sophisticated thing to do. you can connect a few parallel though and address them separately. |
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http://arduino.cc/en/Tutorial/ShiftOut look at the last example. seems quite simple to chain them. |
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wow , that does look neat n tidy too, i was having problems with multiplexing because of the rate i could bang out from max to arduino. in my test, i was using max to bang out to a multiplexer to 9 leds , i banged out a loop as fast as possible and the leds were flickering a fair bit they did look like they were all on at the same time but..a bit naf.. i had all my baud rates the same , so i assumed that max could only send so many bangs to the arduino per second and i reached the limit. and if i had issues with just 9 leds. I imagined how bad 80 leds would be.. so i figured to build little latch circuits on the end of each of the outputs so to hold the led on, and it works perfect, but a fair amount of circuitry is needed. i may as well buy 4 mega arduinos lol. i think a loop from the arduino is quicker and less prone to glitches. perhaps? |
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This is interesting information. I'm supposed to make a new step sequencer for a pattern/EEPROM-less Korg minipops and i'm needing quite a few ShiftIns and Outs for the pushbuttons and feedback LEDs. Though i think for my application i might as well use Shiftregisters. |
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Also, what aruidno are you using Yann? I'm using a Duemillanov (if i spelled it correctly) and i've noticed digital pin 2 called in the code is actually digital pin 1 on the board somehow, do you have the same problem? This has kept me up till 9 am once to troubleshoot another sequencer i was building, and i fixed it by accidently putting a lead into digi pin 1 instead of 2 (as i obviously called pin 2 in the code). |
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Ah just saw your video, you use an UNO so that mistake must be fixed :) |
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on my arduino dumilenouvy (spelling lol ) pin 2 = pin 0 pin 3 = pin1 (i use serial from max tho) i can only get 12 outs on my board , i think the analog ins can be made to become outputs through a sketch too. |
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sounds weird, never had such unexpected behaviour on my uno :) btw it's "duemillanove" |
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You can analog out but they only work on the PWM digital pins, afaik the analog ins stay analog ins forever. |
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yann, thats right the dumienlynovy , i always get that wrong. fah , srry i thought i read somewhere that by changing the arduino sketch each of the analog inputs could be turned into digital outs as desired. ive been having weird dreams lately anyway, i have diffrent browser bookmarks in my dreams. lol. im just being silly now. |
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Who knows it might be possible though, but did you google around for it? |
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I cant find it now, googled for a fair while : ( if you ever need it, i'm sure someone on the arduino forums knows. : ) |
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well i only really need the PWM outputs if i need them, and i think if you need more you can always use a output shiftregister since the data pin is PWM, and thus i think you can have variable outputs on the shiftout as well. This i never experimented with though. |
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i read that as well |
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cool i can see your gonna be making a uniquely cool console! |
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