[simpits-tech] MM5451 LED Driver
Joseph Fagner
simpits-tech@simpits.org
Sun, 10 Nov 2002 11:01:46 -0600
Volker, did you ever get a chance to look at your circuit? I'd like to
get a schematic from you if you have the chance.
To anyone else, I was organizing my electronic component (caps,
resistors etc.) this weekend and I have some 5V voltage regulators left
over from some previous projects. I went back and looked at those
previous project schematics (had nothing to do with pit building) to see
how they are wired together in circuit and saw that one circuit had a
diode in line with the external power source with a small capacitor off
to the side (usually a 9V DC converter, i.e. "wall wart" that is center
positive) and another had a bridge rectifier in the circuit. Can some
one explain what these are for (diodes, rectifiers etc..) and how could
I go about making a simple circuit for use with this project (or any
other project) that utilizes these 9V DC converters? Also, could one
use a computer power supply as a source of power instead of the 9V DC
converter? Do you have to have a special circuitry before you run this
voltage into the chip? How does one control the current (amps) that
flows in your circuit? These have +5V and +12V connections, are these
types of supplies suitable to power these circuits? I know these are
probably basic electronics knowledge, but was curious on how to do this
myself without burning the house down. Is there a good book I could get
that will explain the basics (I had basic stuff in college like V=IR and
all that stuff) of power and designing simple circuits and stuff like
that.
Thanks
Jay
"Show me a man who cannot be bothered to do the little things, and I
will show you a man who cannot be trusted to do the big ones."
--Lawrence Bell, Founder Bell Helicopter
-----Original Message-----
From: simpits-tech-admin@simpits.org
[mailto:simpits-tech-admin@simpits.org] On Behalf Of volker metzger
Sent: Thursday, October 31, 2002 4:57 AM
To: simpits-tech@simpits.org
Subject: RE: [simpits-tech] MM5451 LED Driver
Hi Jay,
I use robs great driver with 2 mm5451 for a long time and hope I can
give you the information you need to build the circuit. For the power
supply I use 6 volt (6v) with 200 milliampere (200ma). I run it on one
machine with one parallel port and have around 60 different led (low
power leds, plan leds, high intensity leds). I give you more information
(how to connect it and so on) at the weekend because I must take al look
at my circuit first, if you like I can upload pictures of the circuit.
In the meantime you can take
a look at the circuit in action, go the simpits member file "other -
general" and take a look at my upload pictures lights, ohp,closer and
lefside.jpg.
volker
"jay-anna" <jay-anna@mindspring.com> schrieb:
> To Robert or anyone out there, could you give a brief description of
how
> this circuit works and will it work on a slave machine networked to a
> main box running Falcon or must it run on a host machine running
Falcon?
> Can it run on a slave machine with Falcon mem-reader running? There
are
> 2 chips listed on the spreadsheet, are these two different circuits?
Do
> they need two different parallel ports? Two different computers?
Where
> does one locate these chips? Digikey? Mouser etc? The pin
assignments
> for the LEDs are not really the pin of the chip, but the listed outs
> 1-35 listed on the circuit? Are there any resistors that need to be
> used with these LED's? What voltage LED are the best for this
circuit?
> The capacitor, can it be a generic ceramic disc capacitor or does it
> need to be tantalum, electrolytic etc. type?
>
>
>
> I'm not trying to be a butt with all the questions, goodness knows my
> pants are going crazy for the fact that someone knows how to do this
and
> is willing to share it with others and now one less thing I have to
> figure out (and would probably have a hard time doing it since I don't
> know anything about programming).
>
>
>
> Thanks
>
> Jay
>
>
>
>
>
> "Show me a man who cannot be bothered to do the little things, and I
> will show you a man who cannot be trusted to do the big ones."
> --Lawrence Bell, Founder Bell Helicopter
>
> -----Original Message-----
> From: simpits-tech-admin@simpits.org
> [mailto:simpits-tech-admin@simpits.org] On Behalf Of Robert Favre
> Sent: Tuesday, October 29, 2002 6:14 PM
> To: simpits-tech@simpits.org
> Subject: RE: [simpits-tech] MM5451 LED Driver
>
>
>
> No problem Mike.
>
>
>
> Ok.here we go.I've uploaded the program to the ftp server
> (Falcon2_4.zip). The installation instructions are fairly simple.put
> the vbio.dll file into the \windows\system directory, click on the
> Falcon2_4.exe program to run. I've also included an excel spreadsheet
> that lists which lights are on which pins. Questions are welcome
>
>
>
> Rob
>
>
>
> -----Original Message-----
> From: simpits-tech-admin@simpits.org
> [mailto:simpits-tech-admin@simpits.org] On Behalf Of Mike Williams
> Sent: Tuesday, October 29, 2002 3:23 PM
> To: simpits-tech@simpits.org
> Subject: RE: [simpits-tech] MM5451 LED Driver
>
>
>
> Thanks Rob, I may ask your help on this as I move forward, no heavy
> bugging though :)
>
>
>
> -----Original Message-----
> From: simpits-tech-admin@simpits.org
> [mailto:simpits-tech-admin@simpits.org]On Behalf Of Robert Favre
> Sent: Tuesday, October 29, 2002 5:57 PM
> To: simpits-tech@simpits.org
> Subject: RE: [simpits-tech] MM5451 LED Driver
>
> Yup.I'll put together a zip and post to the server.
>
>
>
> Rob
>
>
>
> -----Original Message-----
> From: simpits-tech-admin@simpits.org
> [mailto:simpits-tech-admin@simpits.org] On Behalf Of Mike Williams
> Sent: Tuesday, October 29, 2002 1:56 PM
> To: simpits-tech@simpits.org
> Subject: RE: [simpits-tech] MM5451 LED Driver
>
>
>
> Rob,
>
> no idea how to code, maybe I will have to learn some if I must, do you
> already have a program written to for the w/ 5451 to interface w/
>
> Falcon?
>
>
>
> Thanks
>
> -----Original Message-----
> From: simpits-tech-admin@simpits.org
> [mailto:simpits-tech-admin@simpits.org]On Behalf Of Robert Favre
> Sent: Tuesday, October 29, 2002 2:40 PM
> To: simpits-tech@simpits.org
> Subject: [simpits-tech] MM5451 LED Driver
>
> Ok folks.I've uploaded (circuit.jpg) the circuit diagram for the 5451
> LED driver to the ftp site. In a single chip configuration, the chip
> connects to pins 2,3 and 18 of the parallel printer port. As always,
> please be careful in working with ports on your PC. If anyone needs
> help with the code portion, I can only help if you're interested in
VB.
> Also, my code requires the use of a 3rd party driver called VBIO (it's
> free, and I believe I have a copy somewhere as well). When I last
> played with the code, I was running a Win98SE PC, so I haven't tested
on
> any other OS.
>
>
>
> Rob
>
>
>
>
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