RE: Status LEDs

From: Russell Kohn <
>
Date: Tue, 1 Apr 2003 12:39:47 -0600 (CST)

When you say from a parallel port, you mean without any ICs? I've seen
schematics for controlling up to two LEDs from a parallel port, but I need
to control 12-15... The serial setups described sound alright for my
purposes.

On Mon, 31 Mar 2003, Jason Fox wrote:

:There is code and schematics for doing this from a parallel port, poke around on the 'net and you should be able to find it.  If parallel isn't an option and serial is, you are probably correct, microcontroller would be relatively easy.  Another way would be the USB PIC chips, that would eliminate the need for serial.
:
:
:- Jason W Fox
:- Electronics Engineer
:- (202) 404-3736
:- SPG, ENEWS, Code 5707
:- Tactical Electronic Warfare Division, Naval Research Lab
:- Washington, DC
:
:
:-----Original Message-----
:From: Russell Kohn [mailto:]
:Sent: Saturday, March 29, 2003 01:02
:To: Wear-hard List
:Subject: Status LEDs
:
:
:This is a sort of odd question, which seems like it should be pretty
:straightforward, but I haven't really found an answer yet by looking
:around...
:
:So the question is this: How can I interface 12-15 LEDs to my wearable?
:Preferably this would be a serial or parallel interface, but anything else
:is fine...
:
:I'd like to be able to place the LED's wherever I'd like (the goal here is
:to place very dim, very small LEDs on the face of the watch for some very
:simple output from the wearable... sort of like a simple status update
:that I can get by just glancing at my watch). I assume this will involve a
:microcontroller of some sort, but I don't actually know how to do this.
:
:Anyone done this before?
:
:
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