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How to Make a Circuit That Detects High Frequencies: The Bat Detector

How to Make a Circuit That Detects High Frequencies: The Bat Detector

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Bat detector circuit – Nottingham Hackspace

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Franzis Bat Detector Circuit Diagram

Franzis Bat Detector Circuit Diagram

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Build a Bat Detector | Bat detector, Detector, Bat

design - Replace crystal earpiece in bat detector circuit - Electrical

design - Replace crystal earpiece in bat detector circuit - Electrical