Comment on Digital buffer works for a bit, then stops, turning it off for an hour resets it to working again
litchralee@sh.itjust.works 1 day agoFor your edit #2, can you post a schematic of the relevant part of the circuit? It’s a bit hard to imagine how things are arranged, especially where your pull up resistor at the output of the buffer is.
avidamoeba@lemmy.ca 7 hours ago
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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. All lines 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 the new chips last a little longer, then they stop working much faster after recovery.