• 181 Posts
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Joined 2 years ago
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Cake day: July 5th, 2023

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  • Some of the most insidious forms of decentralization have occurred at the level of politics. Provincial governments routinely engage in buck-passing and blame avoidance, attempts to pin responsibility on the federal government for matters under their own jurisdiction.

    This is a significant problem but it won’t be solved by centralization. People in any organization, public, private, engage in shifting the blame on fuckups. It doesn’t matter where the real responsibility lies, as long as the audience buys the blame.


  • (sorry for the long delay)

    No prob whatsoever. I appreciate your time.

    As for the computer, I have no idea and I’m not skilled enough to check. I ordered some push-pull quad channel buffers from TI and Nexperia, SOIC breakout board and decoupling caps. Unfortunately I made it work using a Trinket M0 with a trivial CircuitPython program before those arrived. Already tested it on a bike ride and just sitting powered on over 24 hours. No failure so far, so I conformally coated it and installed it. The fly was killed with a bazooka. 😂 And so I think I’m gonna keep it like that and will revisit the new buffer ICs I bought if it fails again, or if I need to build another adapter. Thank you for your help!


















  • This is my attempt at a diagram of it. There’s 3 connectors, bike computer PAS, Bafang PAS torque sensor, DC barrel (battery). There’s a Recom DC-DC with built-in wire leads. There’s a breakout board on which I’ve soldered the buffer onto. All lines on the diagram are short, thin wires, 1-4cm in length. As far as I know, there’s a pull-up resistors inside the bike computer on its inputs. I can see the values going high when I disconnect the cable from it (there’s debug screen on the computer that shows the input values). When assembled it becomes a part of a cable. I’m using heavy duty heat shrink tubing for structure. I have one of these working on another bike without issues for a while now. The components in the adapter are the same, but the bike motor and controller are slightly different, so there could be differences in what noise there’s in the system.

    Yesterday I replaced the Nexperia IC for a TI which I had on hand, no capacitors still (on order). The TI worked well during a test for an hour. Then it stopped working at LOW, just like the Nexperia. Is it possible for these events to be damaging the IC? I feel like newly replaced chips last a little longer during first use, then they stop working much faster after recovery.