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Getting two LM3916 chips to act as one? Answered

I've tried to connect two LM3916 chips together in a VU meter to increase the number of LEDs to make the range broader with no luck. Each chips acts independently as if it were stand alone. Does anyone have a suggestion or possibly a diagram showing how to connect the chips to make them act as a single chip increasing the number of lights to increase the range? I followed the cascading connection in the manufacturer's data sheet, but I'm not sure how to power and deliver the signal to the second chip so I connected it like you would a single chip, tested it in dot mode with a potentiometer and than connected pin #9 from the first chip to pin #1 on the second chip. The power connection where the same as they were for the 1st chip. Any advise and/or assitance would be greatly appreciated. Thanks,


I think I commented on this offline to you. Basically, you have to connect the dividers in each device together, as per the datasheet. Sean makes a valid point (didn't I say it too ? ) that you'd be better with a 3915 and a 3916. Steve

See pg 12> Cascading the LM3916. I suspect that you need to use am LM3915 and LM3916, rather than a pair of LM3016s to accomplish the task (note the dynamic range offered using the pair of 16s vs 15 & 16) Also, see pgs 13-18 for more discussion on extended range operation. To use the dual LM3916s, you'll need to change the resolution on the second LM3916

Huh? page 12 in my book is an add for perfume. Pages 13-18 are an expose on the tax system. I must be lookin in the wrong book!