220 V matrix control

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Medtronic

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Dear All my friends

i need to design a 8X8 led matrix ... no problem with the theory or the software ... but how can i control the 8x8 matrix for 220 v output .... i need to control the 220 v for out the row and the col to access one out for a moment ....

please advice as soon as possible

Best Regards

MedTronic
 

Why not DC? What power level?

For AC you need isolated drivers to a ZCS Triac or std Triac.
To select each , you need an 8x8 DEMUX.

Options include opto isolators . or pulse transformers.

are these dimmable? Programmable?
 

thanks for your replay ....

No dim .... no programmable ..... and let it a 220 V dc ... please give me a schematic for your options

thanks very much
 

dear my friend
my leds are connected in series .... it sold as it is ... and run at 220 v ac with and without bridge rectifier ... please help
 

Medtronic said:
dear my friend
my leds are connected in series .... it sold as it is ... and run at 220 v ac with and without bridge rectifier ... please help
Click to expand...

Wait you're saying the LEDs are in series?

can't make a 8x8 matrix with series LEDs...current through 1 LED is the same current that is flowing through all of them. Can't individually turn them on an off in a series arrangement.
An 8x8 matrix has to be built something like this
 

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