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Inst Tools > Blog > Animation > Main differences between Sinking and Sourcing Circuits

Main differences between Sinking and Sourcing Circuits

Sinking vs Sourcing : What are the main differences between sinking and sourcing circuits ? Sinking is switching the load in the negative leg of a circuit.

Last updated: November 2, 2023 3:05 pm
Editorial Staff
Animation PLC Tutorials
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What are the main differences between sinking and sourcing circuits ? Lets check the below animations of sinking and sourcing.

Contents
Sinking vs SourcingBasic DC CircuitsSinking Switch CircuitSourcing Switch Circuit

Sinking vs Sourcing

In a DC circuit, power flows in one direction: from the positive side of the power source, through the load, to the negative side of the power source.

Basic DC Circuits

What are the main differences between Sinking and Sourcing circuits ?

To switch the load, you can place the switch either in front of the load (on the positive leg of the circuit) or behind the load, on the negative leg.

Sinking Switch Circuit

Sinking is switching the load in the negative leg of the circuit, as shown here.

Sinking Switch Circuit

Sourcing Switch Circuit

Sourcing is switching the load in the positive leg of the circuit, as shown here.

Sourcing Switch Circuit

Also Read: Difference Between Sinking & Sourcing Current

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4 Comments
  • Justin Brockway says:
    July 21, 2016 at 4:38 am

    The present adopted theory is that Current (I) flows from Negative (-) to Positive (+) through the load. (Electron Flow Theory)
    -also, “power” is the term associated with Watts consumed by the Resistance when Current flows through the load, due to potential (E); therefore “power” is not a “thing” and cannot “flow”

    Reply
    • S Bharadwaj Reddy says:
      July 21, 2016 at 5:35 am

      Thank you Justin for sharing the knowledge.

      Reply
  • Shanmugam Iyappan says:
    October 12, 2016 at 5:35 am

    Fantastic explanation, Thanks!

    Reply
  • Pradeep Rawat says:
    October 10, 2019 at 5:34 pm

    satisfactory explaination !

    Reply

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