I hope this works for uno! cross fingers, I will give this a shot. I was a little unhappy they weren't as popular as i hoped :/

http://www.ebay.co.uk/itm/380531435383?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Back to square one, lost library. could someone send me library that is simple connect eg d4 to cs1 d5 to datd d6 to wr
thank yiou

Thank you all for taking an interest.
Just got my new board from sure electronics, I have loved playing around with the 7219 and a single matrix which I did many different things with. I thought this would allow me to create more designs and applications with.

I have had several problems being that I am unable to find a library that works. I have tried all the ones I could find of you tube and major ones. I now know there's a difference between the red and GREEN one which i have.

I found a library that worked (ish) and the axis was a little muddled. It took me **oody ages to find and I have just deleted the .h file. So sorry I was unable to pass it on to you. On the brighter side here is a video of me using it. I have the green one 16*24

Could someone supply me with a library that allows some basic xy setting eg. matrix.setled(x,y,true) I like to work just of that. And could someone also give me the suitable pin connections too, I find it incredibly hard to find it out :/ Thanks very much

TrevorB

Video:
http://youtu.be/FtYMTQgfZnQ


P.S I will honestly pay the person af fiver who finds a working library trevor.boultwood@hotmail.co.uk

Would appreciate any response

bump...

Here is the library used:
https://github.com/adafruit/HT1632

Thank you all for taking an interest.
Just got my new board from sure electronics, I have loved playing around with the 7219 and a single matrix which I did many different things with. I thought this would allow me to create more designs and applications with.

I have had several problems being that I am unable to find a library that works. I have tried all the ones I could find of you tube and major ones. I now know there's a difference between the red and GREEN one which i have.

I found a library that worked (ish) and the axis was a little muddled. It took me **oody ages to find and I have just deleted the .h file. So sorry I was unable to pass it on to you. On the brighter side here is a video of me using it. I have the green one 16*24

Could someone supply me with a library that allows some basic xy setting eg. matrix.setled(x,y,true) I like to work just of that. And could someone also give me the suitable pin connections too, I find it incredibly hard to find it out :/ Thanks very much

TrevorB  

Code:

#include "HT1632.h"

#define DATA 2
#define WR   3
#define CS   4


HT1632LEDMatrix matrix = HT1632LEDMatrix(DATA, WR, CS);


void setup() {
  Serial.begin(9600);
  matrix.begin(HT1632_COMMON_16NMOS);  
  matrix.fillScreen();
  delay(500);
  matrix.clearScreen();
}

void loop() {
 

}

I liked this libary, it was just what i wanted. but didnt work with my matrix, plus lost the files for it

Video:
http://youtu.be/FtYMTQgfZnQ


P.S I will honestly pay the person 3 quid who finds a working library trevor.boultwood@hotmail.co.uk

Thank you all for taking an interest.
Just got my new board from sure electronics, I have loved playing around with the 7219 and a single matrix which I did many different things with. I thought this would allow me to create more designs and applications with.

I have had several problems being that I am unable to find a library that works. I have tried all the ones I could find of you tube and major ones. I now know there's a difference between the red and GREEN one which i have.

I found a library that worked (ish) and the axis was a little muddled. It took me **oody ages to find and I have just deleted the .h file. So sorry I was unable to pass it on to you. On the brighter side here is a video of me using it. I have the green one 16*24

Could someone supply me with a library that allows some basic xy setting eg. matrix.setled(x,y,true) I like to work just of that. And could someone also give me the suitable pin connections too, I find it incredibly hard to find it out :/ Thanks very much

TrevorB 

Code:

#include "HT1632.h"

#define DATA 2
#define WR   3
#define CS   4


HT1632LEDMatrix matrix = HT1632LEDMatrix(DATA, WR, CS);


void setup() {
  Serial.begin(9600);
  matrix.begin(HT1632_COMMON_16NMOS); 
  matrix.fillScreen();
  delay(500);
  matrix.clearScreen();
}

void loop() {
 

}

I liked this libary, it was just what i wanted. but didnt work with my matrix, plus lost the files for it

Video:
http://youtu.be/FtYMTQgfZnQ

I  bet he meant '138

You are precisely right my bad!

Can you provide a link to this device, please?

Look below that's what I used


Cross roads, that's the concept I am looking for,
I literally want a chip that has 8 (or more) outputs with only 3 or 4 inputs so i can count in binary on these leads to supply many more connections. The chip i bought I am almost certain it isnt what I am looking for. Thank you all for your time

Hello all,
I recently bought a sn74ls1388n in hopes of creating a 3 pin to 10 pin converter, in which i can control motor controllers with less pins. I understand you could use a shift register But that wouldn't be as awesome!

I must of misunderstood the chip as it did not work... I also was looking at the data sheet and i am convinced it is for signals of that i do not understand. has anyone used such a chip? And could some one just name it... thank you

Ohhhh! I totally understand now! That makes a lot of sense, and it easier to implement! I might try you method right now, The only problem, Is that I have 1 matrix so I would have to change the axis to like 4x4 grids, which is a little small, Ill see what I can do, I haven't tried adding more displays, I might have to try daisy chaining them. Thank you again! Hmmm! I will have the think this through! Thanks!


TrevorBoultwood

Ohh! I see, so I can't square root everything separately? Hmm interesting! I am trying to imagine or work out what how I can do this symmetry thing? I kinda want to input values and then draw a circle from the center point and then the radius. I guess are you trying to suggest, to use this formula(I do recognize it) and then apply points within it? Thank you both for replying!

So I am still messing around with the 7219, I have an axis (8 by  
I thought in maths today, it would be pretty cool if could represent my homework to myself on the matrix(or this is just an excuse ). I nearly aced the y=mx + C. Just inputting a gradient and an intercept, this was pretty cool as you could make some cool patterns with just changing the intercept.

I then wanted to try and make circles on the display using the formula (x-a)^2 + (y-b)^2 = r^2 . Now because I just cycle through x we are really only finding the x value with a given mid point and radius (a and b and r).

Rearranging
(y-b)^2 = r^2 - (x-a)^2
square root
(y-b) = r - (x-a)
then finally
y= r - (x + a + b)


Hopefully this is wrong so It gives me somewhere to actually correct this, but when I tried It was extremely weird I am not to sure how to explain. But what I am really asking (even though this is a programming forum) Is my algebra correct? And do I need + and minus values?

Hopefully everyone is with me, and could anyone suggest patterns for me to try? I was hoping to incorporate trig functions and create a moving AC wave but I wouldn't know where to start? BTW I have complete C1 and doing C2 so this is why I am using these formulas.

 Thank you to all those who suggest things, and Ill post a video when I get something a little 'neater' working, for now I might just make some Serial UI and display the Graph or something. Thanks again!
Trevor Boultwood.

Have got The components in, but has a busy night, will install tomorrow instead. I had a little research and now know what the smaller capacitor does within the circuit(hopefully). Does it help make the chip 'understand' or prevent it from getting the two frequencies etc. I guess from the several inputs? And possibly the PWM for the LEDs. OR is just for the data lanes