Battery Tester

  • Quickly and easily check your 9V batteries
  • Simple multi-colour system
  • Circuit can be modified for different types of batteries
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Parts List

  • 1 X LM324 - Quad Op-Amp
  • 2 X 1K5 (1.5K) Resistors
  • 2 X 10K Resistors
  • 2 X 1K Resistors
  • 1 X RGB LED
  • 1 X 7V5 (7.5V) Zener Diode
  • 1 X 8V2 (8.2V) Zener Diode
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