federico muelas
New Member
Hi Everyone,
My name is Federico Muelas, I run a New Media/Public Art studio in New York. I’m currently working on a Commission for the George Pearl Hall building, the new School of Architecture and Planning at the University of New Mexico.
You can find further info about the project at:
www.federicomuelas.com
For this project I’m designing a large format display incorporating 3,700 pixels of 5’x5’ each made out of NPD-LCD. I’m using RS422 serial communication to control the units and most likely I will use a MAX335 chip to locally multiplex the signal on the screen.
The problem I have is that NPD-LCD technology requires AC current (although the required voltage is quite low, only 15V ac @ 7.3mA per pixel). So I need to find a reliable and inexpensive way to convert the 15 V DC that I’m getting out of the MAX335 chips into 15V AC voltage at 60 Hz (or closer) to control each pixel.
I’m afraid that if I use triacs with optoisolators or Solid State relays to convert the DC current coming out of the MAX335 into AC current I will end having too much electrical noise and ultimately an instable system.
Any Ideas?
Thank you so so much
Best wishes
Federico Muelas
My name is Federico Muelas, I run a New Media/Public Art studio in New York. I’m currently working on a Commission for the George Pearl Hall building, the new School of Architecture and Planning at the University of New Mexico.
You can find further info about the project at:
www.federicomuelas.com
For this project I’m designing a large format display incorporating 3,700 pixels of 5’x5’ each made out of NPD-LCD. I’m using RS422 serial communication to control the units and most likely I will use a MAX335 chip to locally multiplex the signal on the screen.
The problem I have is that NPD-LCD technology requires AC current (although the required voltage is quite low, only 15V ac @ 7.3mA per pixel). So I need to find a reliable and inexpensive way to convert the 15 V DC that I’m getting out of the MAX335 chips into 15V AC voltage at 60 Hz (or closer) to control each pixel.
I’m afraid that if I use triacs with optoisolators or Solid State relays to convert the DC current coming out of the MAX335 into AC current I will end having too much electrical noise and ultimately an instable system.
Any Ideas?
Thank you so so much
Best wishes
Federico Muelas