Mark Rehorst's Tech Topics

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

Saturday, July 4, 2026

Sonolok Acoustic Panels for the Living Room Wall

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Sonolok acoustic panels come in boxes of four.  The TV in my living room hangs on a wall that's about 3.3m (11') high x 6.7m (22...
Tuesday, April 14, 2026

Update on Arrakis 3.1- a New Mode of Operation?

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Arrakis 3.1 has been working well after I sorted out some issues with the mechanism and the electronics. It is fast and quiet and not too u...
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Friday, February 27, 2026

Wiim Amp Ultra for Quad ESL-63s and SVS 3000 Micro sub

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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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Update 3/31/26 The mechanism started making noise again, so I opened the table up and found that the belt was climbing on the corner pulleys...
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