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control 10 LED's Using a Single IC

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gauravkothari23

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Hi all,
I want some ideas about IC's to drive the LED's.
i have 10 LED to operate but i have only 4 pins to drive using 89S52 Microcontroller. it it possible using some specific IC or some other way.
I need to switch the LED's ON and OFF as per my specifications and use.
 

The classic methods are to use a port expander or a shift register. Both essentially mean you send the 10 LED control signals one at a time and capture them in the expander before presenting them in parallel to the LEDs.

I2C can do it with two MCU pins, a shift register probably needs three, clock data and latch.

Brian.
 

The classic methods are to use a port expander or a shift register. Both essentially mean you send the 10 LED control signals one at a time and capture them in the expander before presenting them in parallel to the LEDs.

I2C can do it with two MCU pins, a shift register probably needs three, clock data and latch.

Brian.

Thanks a lot to all....
I found the things working perfect using 89S52 microcontroller and 74Hc595 IC where i can control about 8 Led's using only 3 pin.
 

Hi,

Or use two HC595 and control up to 16 LEDs with 3 wires.
Or "n" HC595 for 8 x "n" LEDs.

Klaus
 

Hi,

Or use two HC595 and control up to 16 LEDs with 3 wires.
Or "n" HC595 for 8 x "n" LEDs.

Klaus

Thanks Klausst....
yes i have checked using 5 IC's in parallel, connecting 8 LED's to each IC... but found that more the IC's lesser the output Speed.
 

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