Build this Cmos 4060 based Repeating Timer using cheap off-the-shelf components.
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Repeating Timer No.9 - Photograph

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This is a photograph of the Cmos 4060 based Repeating Timer No.9. It will energize the relay for up to 24-hours - or more. And it will do so repeatedly - at intervals of up to 24-hours - or more.
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Image Magnifier Courtesy Of DynamicDrive.Com