7seq.digi Display on Pidgets 64LED Board

[frank-riedel]

Hi All
Can anybody show me an example on "how to" connect an array of 4 or more...
7 SEQ. Displays on a Phidgets 64 LED board??

Regards
Frank

[frank-riedel]

NoOne played with that ??

/Frank

[MyCo]

What seg display do you want to use? Give me a link to a datasheet, and I tell you how to do it, if it is possible.

[frank-riedel]

http://docs-europe.electrocomponents.co ... 025c0b.pdf

You are my fdriend


I know about the transistor connection metode to select the display for input and array setup...
but im also interrested to see exampels on driving on output on leg of the display

THANKS ALOT

Frank

[MyCo]

I've had a look, here is the thing:

1. You can only use the Seg. Versions that have a 1 at the end of their part number, something in this format: HDSP-U__1
2. For Red and Yellow versions of this Seg. you should think about using a protections resistor. But it might not be required, because the phidget drives the LEDs in multiplexing mode, so the LEDs only see current peaks.

I'll sketch something together...

[support]

Had a quick look at the Phidgets led 64 manual and it says you can connect the leds directly to the board (no resistor).

http://www.phidgets.com/docs/1031_User_Guide

So I guess the hardest part is writing to all of those individual addressed leds.

Try this (not tested) but should get you going:

Ruby Seven Segment Display clip.png (46.1 KiB) Viewed 24798 times

Ruby Seven Segment Display.fsm

(2.18 KiB) Downloaded 1073 times

If you wire them up like this:

LED - Segment
0 - a
1 - b
2 - c
3 - d
4 - e
5 - f
6 - g
7 - dp

[frank-riedel]

YOU ARE MY MAN . . . From here i can have a nice weekend.... i´ll be back

Merry Christmas
Frank

[frank-riedel]

YOU ARE MY HERO

I have something to play this weekend... I'll be back...

Merry Christmas
Frank

[MyCo]

You can connect them directly, but then you drive the seg with overcurrent. And as long as you don't know the pulse length that this phidget thing uses, you should avoid that. In my plan, I wouldn't use the connectors 0-7, because the the seg is common anode, and every even LED-Port on the phidget is one anode, and every odd LED-Port is another anode. So I would use 0,2,4,6,8,10,12,14 or 1,3,5,7,9,11,13,15 for one display.

[support]

You can connect them directly, but then you drive the seg with overcurrent. And as long as you don't know the pulse length that this phidget thing uses, you should avoid that. In my plan, I wouldn't use the connectors 0-7, because the the seg is common anode, and every even LED-Port on the phidget is one anode, and every odd LED-Port is another anode. So I would use 0,2,4,6,8,10,12,14 or 1,3,5,7,9,11,13,15 for one display.

You won't over current them as the are current limited in the Phidgets Module. There is a current limit input on the FlowStone module, these don't use PWM but use active current limiting ( see Manual). Each of the 64 channels are the same and have an anode and a cathode input (two per connector). However I've not see in the manual which is active, but these devices are usually pull down so if this is the case then a common anode display should work.