Rig Up a Raspberry Pi to An Old CD Tray for An Automated Tea Steeping Device Lifehacker Basically, you just rig up the Raspberry Pi's GPIO pins to the CD drive's motor, download a simple set of Python code, and then you're all set. When triggered, the CD drive presoaks the tea bag, then dunks the bag up and down for a set number of cycles.

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Rig Up a Raspberry Pi to An Old CD Tray for An Automated Tea Steeping Device – Lifehacker