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Q&A Converting 5V to ±12V

You say the only thing that will be powered by the ±12 V supplies is a comparator. The first thing I would look at is whether you really need the comparator to run from that voltage range. Presum...

posted 11mo ago by Olin Lathrop‭  ·  edited 11mo ago by Olin Lathrop‭

Answer
#2: Post edited by user avatar Olin Lathrop‭ · 2023-12-03T17:34:40Z (11 months ago)
  • You say the only thing that will be powered by the &plusmn;12 V supplies is a comparator. The first thing I would look at is whether you really need the comparator to run from that voltage range.
  • Presumably you are asking for &plusmn;12 V because that is the range of the signals being compared. Use resistors to get the signals into the 0 to 5 V range, then run the comparator off the existing 5 V supply.
  • You say the only thing that will be powered by the &plusmn;12 V supplies is a comparator. The first thing I would look at is whether you really need the comparator to run from that voltage range.
  • Presumably you are asking for &plusmn;12 V because that is the range of the signals being compared. Use resistors to get the signals into the 0 to 5 V range, then run the comparator off the existing 5 V supply.
  • <blockquote>I need comparator output to be +-12V, not 0/5V.</blockquote>
  • Then you need to explain more about your overall system. Where does this -12 V to +12 V signal go if there are no such supply voltages anywhere? This smells like an X-Y problem.
#1: Initial revision by user avatar Olin Lathrop‭ · 2023-12-03T14:34:57Z (11 months ago)
You say the only thing that will be powered by the &plusmn;12 V supplies is a comparator.  The first thing I would look at is whether you really need the comparator to run from that voltage range.

Presumably you are asking for &plusmn;12 V because that is the range of the signals being compared.  Use resistors to get the signals into the 0 to 5 V range, then run the comparator off the existing 5 V supply.