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current sensing circuit — Parallax Forums

current sensing circuit

ratsrats Posts: 2
edited 2012-09-08 08:34 in Accessories
Hi,
I'm new to this forum...
can anyone plsss help me in explaining this current sensing circuit...
Doc1.docx



Thanks for ur comments...
Rats...
docx
docx
Doc1.docx
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Comments

  • davejamesdavejames Posts: 4,047
    edited 2012-09-07 08:26
    ...sure.

    When the input voltage (called 'current_sense' on the diagram) is greater than the reference volage set by RV1, the output of the op-amp will switch to nearly the Vdd value. This will turn on transistor Q5 causing a nearly zero level (actually Vce of the BC547BP) on the test point 'surge_detect'.

    Make sense?
  • ratsrats Posts: 2
    edited 2012-09-07 23:57
    yup thanks for ur reply.... :smile:
  • davejamesdavejames Posts: 4,047
    edited 2012-09-08 08:34
    rats wrote: »
    yup thanks for ur reply.... :smile:


    Welcome!
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