Engineering

New PCB, New Micro-Controller

Due to the crisis in the supply of electronic components, I have had to look for substitute parts. It’s been an endless hunt for vendors/suppliers, and prices. Availability and prices change overnight. Even when I successfully order parts, the vendor cancels on me before shipping! Some parts have become far too expensive. Micro-controllers are a […]

Mount-Point for Theft Deterrent

As outlined in some of the history of the Minder1 theft-deterrent for bicycles, the original hope was to mount the system inside the bicycle frame. Chief among the consequent problems was the difficulty of achieving loudness. The latter is determinative in the current (autumn 2021) size and mounting-point of the system. But it is not […]

Enclosure Mock-Up

With prices for off-the-shelf enclosures having risen, and supplies dwindling, I’ve had to consider making my own. Yet again! I’d started off by naively thinking of local, custom production. And the obligatory 3D-printing. Then, I ended up researching metal fabrication–even welding! The current focus is on sheet metal. All the going-around-in-circles eventually bore fruit: Riveting […]

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