Dual rail 12 volt supply from 24 volt SMPS

Preamble

After seeing this 24 V SMPS on eBay, Protek 24V 8.4A 200W SMPSU Switch Mode Power Supply Medical Grade PSU PM200-14C, I thought it would be initially useful for a 24 V 3D printer. Then I thought it would be handy for a ±12 V supply for a synth… man, the possibilities are freaking endless..!

See also

Gallery

Links

Conclusions

  • A 7812 and 7912 pair would not work, as they can’t sink currents
  • Op-amp and NPN-PNP pair is a solution, for non-capacitive loads
  • Two 12 V SMPS is the “best” solution, but…
    • It adds more bulk/heat
  • This isn’t very cheap, even if it were a good make, see Double the volts… double the fun!

Other regulator related SE links

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