With KipKay’s new tutorial, “you can [now] do secret surveillance with this ‘caught-in-motion’ spy video cam that records covert video and audio. To start, you’ll need: a motion sensing door chime (Radio Shack part #49-426), a mini spy cam DVR, 200uF capacitor, any reed relay, diode 1N4001, 1N4007, etc., and a momentary switch. Video after the break.

[via Instructables]

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