Bicycle Computer Mount For Bar End

This is a bicycle mount for a computer and a display unit of an ebike. It has 22mm and 32mm tubes to which computers can be mounted. The mount goes into the bar end of a steering wheel. This is paraticulary useful for recumbent bikes. The mount is designed for M5 nuts and bolts, but depending on the accuracy of your 3D printer you might need to use M4 bolts. You can download the 3D files over at GrabCAD.

Here is a technical drawing of the design:

Bicycle Computer Mount Bar Ends Drawing v2

Raspberry C64 Pi Audio and Cooling Update

It was time to improve the performance of this Raspberry C64 Pi computer by adding the official regulated fan to the case. I also added a USB audio adapter to improve the sound quality. With these two inexpensive upgrades, the Raspberry Pi performs much better and the audio quality is much improved.

Raspberry C64 Pi Computer

Running A Raspberry Pi 4 in a C64 case with fully functional keyboard and USB hub.

I integrated a Raspberry Pi 4 into a Commodore C64 Maxi case. The Pi uses the integrated keyboard and the USB hub. An integrated power supply provides power to both, the Pi and the C64, which now run in parallel. The Raspberry Pi boots from an internal SSD drive, turning this machine into a full desktop computer that can also run Retro Pi for true retro gaming.


Parts List


Technical Drawings

The technical drawings are available here.



Holonomic LEGO Mindstorms Robot

A holonomic robot uses omni-directional wheels to drive and turn in any direction on the spot. Agilis is an example of an early LEGO holonomic robot. My model is much simpler and robust. Essential to all holonomic robots are the use of omni-directional wheel, such as the the ones from Rotacaster. I am using a compass sensor to allow the robot to be remote controlled on an absolute grid using Connexion’s Space Navigator. This 3D input devices can be mapped to the unique movements and rotations of a holonomic robot.

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