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DIY Carp Bite Alarm

Build a roller alarm with run and drop-back tones that sleeps between bites to save its batteries.

• Arduino code: pitch, volume, sensitivity, latching LED, silent mode
• Tells a run from a drop-back with two reed switches
• Parts list, wiring diagram and step-by-step build
• 3D-printable roller (STL)

PDF guide (A4) + Arduino code + STL

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