Hello,
I've built couple of voltage monitors based on LM3914. Each chip monitors one 12V battery. IC takes its input power from monitored battery. This works, but I'd like to control multiple chips with a single switch. Otherwise all the chips stay on and leds are lit.
Can I use another battery as a voltage source for these ICs? I was thinking that pins 3 would go together, and so do pins 2 for each chip, and separate 12V battery powers all the chips then.
If that doesn't sound good is it possible to use optocouplers for cutting plus-wire input? I have no experience in those components but I figure those are simple enough for me to use. I don't know much about those, yet.
Thanks for all the time you spend replying me.
I've built couple of voltage monitors based on LM3914. Each chip monitors one 12V battery. IC takes its input power from monitored battery. This works, but I'd like to control multiple chips with a single switch. Otherwise all the chips stay on and leds are lit.
Can I use another battery as a voltage source for these ICs? I was thinking that pins 3 would go together, and so do pins 2 for each chip, and separate 12V battery powers all the chips then.
If that doesn't sound good is it possible to use optocouplers for cutting plus-wire input? I have no experience in those components but I figure those are simple enough for me to use. I don't know much about those, yet.
Thanks for all the time you spend replying me.