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help with adding an additional circuit...

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KMoffett

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VERY, VERY DANGEROUS !!!!!

You need opto-isolators or solid state relays (SSR) between the LM3914 and the triacs.

What is the input signal source to the IC? What is the power source for the IC?

Ken
 

KMoffett

Well-Known Member
The danger in your circuit is connecting the AC power line directly to your IC and to your sound source.
This (top circuit) is how you would implement opto-isolators between your IC and the triacs. Pin 2 of the opto-isolators would go to the output pins of the IC.
Isolation Triac Driver Circuit | Electronic Circuit Directory

Ken
 
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