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Author Topic: Chip selection  (Read 1778 times)
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adriatec
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« on: November 20, 2007, 11:20:27 23:20 »

I am looking for a programmable chip to drive an array of leds:

1. chip should be able to control up to 16 leds or more. probably 0603's
2. chip needs to be very low power. (battery operated)
3. I would like to control intputs to make leds have different patterns
4. A nice function of this chip would be to have a fade effect for led array.

Any suggestions would be greatly apprecitated!
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Parmin
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« Reply #1 on: November 21, 2007, 12:12:09 00:12 »

Use PIC16F88x or PIC16F87X any of them would do.
With a little extra programming,  you could even use a  16F505 by timesharing and multiplexing some of the LEDs.
in this instance, you will only need 5 IO pins, 1 for control and 4 for driving the 16 LEDs.
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building
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« Reply #2 on: November 28, 2007, 02:46:07 02:46 »

Yes, you use mcu control and power supply you will be use DC-DC converter. Because low power circuit want stabilizer of power supply.  Cool
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EDSONCT
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« Reply #3 on: November 28, 2007, 03:10:20 03:10 »

Use PCA9552D Axn,
You can control several drives by I2C interface
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sofian
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« Reply #4 on: November 28, 2007, 08:43:55 08:43 »

PIC16F870 is good choice with 22 I/O
fade efffect,pattern,etc only software
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kcwcc
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« Reply #5 on: November 28, 2007, 10:49:54 10:49 »

PWM option required for fading effect.
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