Uploaded January 2024 | Updated September 2026, 3 weeks ago

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A simple DIY cat whisker detector you can make with brass, stainless, and wood (no 3D printer needed!)

MATERIALS
- Hard wood 6.5 cm (2.56") x 2 cm (0.79") x 4.2 cm (1.65")
- Brass sheet 4.3 cm (1.69") x 2.2 cm (0.866")
- Stainless or brass ball (I used 3/4" or 19mm)
- Stainless or brass rod (I used 2 mm 0.79")
- Wood ball (I used 3/4" or 19mm) or other insulator
- 2 screws, stainless or brass
- 1 spring
- 1 sample well (copper end cap, brass plate with hole, etc)

3D Printed Cat Whisker Detectors:
Crystal Radio Cat Whisker Ver 2.0 **FINAL**! youtu.be/ANuU8gsALzI
Crystal Radio Cat Whisker Detector Ver 1.0 youtu.be/kXv7kUcAICk