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How to make a circuit that detects high frequencies: the bat detector

Franzis bat detector circuit diagram .

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Franzis Bat Detector Circuit Diagram
Franzis DIY Bat Detector Kit

Franzis DIY Bat Detector Kit

Franzis Build Your Own Bat Detector Kit

Franzis Build Your Own Bat Detector Kit

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Bat detector circuit – Nottingham Hackspace

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

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

Franzis Bat Detector Circuit Diagram

Franzis Bat Detector Circuit Diagram

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