MEP EP#225: Clipping and Clamping OpAmps

MEP EP#225: Clipping and Clamping OpAmps

MEP EP#225: Clipping and Clamping OpAmps

Stephen

  • DC heaters continued
    • Tested the new values
    • Last episode was shooting for ~250mW of dissipation in the regulator and transistor
    • Measuring closer to 350mW
      • Quiescent current and some balancing and tolerance
  • Opamp clamping circuit
    • A useful voltage clamping circuit with independent upper and lower thresholds
    • Pros
      • Much more accurate than the simple clipping circuits
      • Hard turn on characteristics
      • Can be overdriven without much issues
      • Not terribly expensive
    • Downsides
      • 3 or 4 opamps needed
      • Not particularly fast - starts to show issues past 20k and is pretty bad at 30k
      • Small overshoot that is frequency dependent
      • Does not work with opamps that have input protection diodes

Parker

  • Brewery Updates!
    • Installed
      • Tubing
      • Pumps
      • Pots
    • Waiting on
      • Stainless mesh basket
    • What is left
      • Design and build the grain crane
      • Mount electrical box
      • Finish wiring
      • Paint and sealant
    • Electrical Box
      • Might have put the power input in the wrong spot!
      • Need to finish the wiring.. Need to order more wire I think...

R.F.O.

  • Rules of thumb - Are they obsolete?
  • Next week we have Al Williams on from Hack a Day
    • If anyone has any questions for him let us know in slack!

Jaksot(448)

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