Mark Rehorst's Tech Topics

My technical projects that include topics such as 3D printing and printer design, photography, optics, electronics, etc.

Friday, February 27, 2026

Wiim Amp Ultra for the Quads

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A while back I bought a Wiim Amp Pro  (WAP) to replace the electronics in my bedroom stereo system. After I realized the bass management can...
Thursday, February 26, 2026

Arrakis 3.0 Updates- Now It's Arrakis 3.1

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After living with Arrakis 3.0 for a few months, a few problems have led to some changes.  1) The cheapo 6A rated power switch welded itsel...
Monday, February 9, 2026

3D Printed Knobs For My LG Stove

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I've had a wonderful LG stove with induction cooktop and convection oven for a couple years. Everything about it is great, except the c...
Monday, January 26, 2026

A New 3D Printer- Bambu Lab H2C

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UMMD is still a great printer 9 years after I built it , but its 1mm nozzle makes it unsuitable for printing small, detailed objects, which ...
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