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insane flipflop measurements

Started by John Larkin in sci.electronics.design7 years ago 46 replies

I'm doing a fast thing and thought I might go all CMOS, instead of traditional expensive ECL. We have the Fairchild NC7SV74 tiny...

I'm doing a fast thing and thought I might go all CMOS, instead of traditional expensive ECL. We have the Fairchild NC7SV74 tiny logic flipflop in stock, 16 cents each. I thought I'd play with one. Here are the rise and fall times at the Q output, 3.3 volt supply: https://dl.dropboxusercontent.com/u/53724080/Parts/Logic/NC7SV74_2.JPG That fall time is amazing, but the rise time is h...


How to drive this huge LED matrix board?

Started by Jan Panteltje in sci.electronics.design10 years ago 14 replies

Scored some of these today, 7Euro50 each : http://www.baco-army-goods.nl/aanbiedingen/ledmatrix-bord-fds132.html Front: ...

Scored some of these today, 7Euro50 each : http://www.baco-army-goods.nl/aanbiedingen/ledmatrix-bord-fds132.html Front: http://www.panteltje.com/pub/matrix_display_front_side_IMG_4118.JPG Component side, lots of 5 V CMOS, processor, optical interfaces: http://www.panteltje.com/pub/matrix_display_component_side_IMG_4119.JPG Would make a nice Merry Christmas running text. Anybod...