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ELECTRONICS

555 Water Level Controller Circuit

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UPDATED 2026-07-31
TYPECircuit
USE-CASEWater Level Controller
EXAMPLE555 Water Level Controller Circuit
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CASE ANALYSIS

Scenario

This diagram shows a 555 timer IC configured as a set/reset flip-flop to control a water pump based on two water level probes.

Key decisions

  • Using 555 timer in set/reset mode instead of timing mode
  • Adding flyback diode to protect transistor from inductive kickback
  • Using pull-up and series resistors for probe sensing

When to reuse this

Suitable for small-scale water level control applications where automatic pump control is needed to maintain water level within a range.

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