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Electronics => Electronics => Topic started by: DanCF on February 21, 2007, 08:56:14 PM

Title: LED control board
Post by: DanCF on February 21, 2007, 08:56:14 PM

I am looking to animate a matrix of LEDs. I am looking for something similar to a microprocessor, where there are multiple channels, however instead of it controlling the wavelength of the third wire and keeping the voltage on the first two constant, I am looking for just two wires per channel on which the voltage can be adjusted from mybe 0-4 volts.

Title: Re: LED control board
Post by: Hal9000 on February 22, 2007, 05:37:37 AM

I think I got lost as soon as you said wavelength. Elaborate.

Title: Re: LED control board
Post by: thesiliconhorizon on February 22, 2007, 07:09:50 PM

try this one, itll run lotsa leds with the darlington array output..

also it can do PWM to run LEDs if you like...  (upto 2 channels)

and you can addon a devantech I2C servo controller to control upto 21 more lines of .5-2.5 mS LED pulses (servo pulses...)

so whatever your needs... check it out!!

but the darlington array is great for running a LED matrix.


www.thesiliconhorizon.com

Title: Re: LED control board
Post by: 555 timer chip guy on March 05, 2007, 09:38:28 AM

Here is a schematic for a counter circuit with varying speed, and if you wont to control the voltage on one pin gust add a transistor and a pot to that pin to control it.Cum to think of it the transistor and the pot could be used on a microcontruler to.

Title: Re: LED control board
Post by: 555 timer chip guy on March 05, 2007, 09:42:38 AM

Quote from: 555 timer chip guy on March 05, 2007, 09:38:28 AM

Here is a schematic for a counter circuit with varying speed, and if you wont to control the voltage on one pin gust add a transistor and a pot to that pin to control it.Cum to think of it the transistor and the pot could be used on a microcontruler to.

sorry about the name of the schematic that part of the circuit was from a nother circuit that I was designing.