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  1. baldguyfromblackpool

    Architecture of mass produced cheap welding set

    I'm no longer trying to fix this Parkside PISG80A1 inverter stick welder because the cost of a brand new replacement coupled with the speed of Amazon next day delivery makes repair pointless. I still have a brain itch about what happened when it broke. I was up a ladder welding a tractor door...
  2. baldguyfromblackpool

    Short range cat detector

    I have a problem with cats jumping up on the kitchen worktops in the night, and leaving a mess. I thought about making up some small devices with a limited range which could detect the proximity of a cat within no more than about 3 feet, and then trigger an alarm to scare off the cat. What...
  3. baldguyfromblackpool

    Distinguish FET from BJT from ? with DMM

    A follow on from my earlier thread about copying a relay controller. I have one final 3-legged SMT component left that I don't fully understand. It's in a circuit position that makes it reasonably clear which should be the gate, source and drain (or base, emitter and collector) Measured...
  4. baldguyfromblackpool

    3296W series multiturn trimpot

    3296W series multiturn trimpot... e.g. https://docs.rs-online.com/d700/0900766b8069ccf4.pdf https://www.bourns.com/docs/technical-documents/technical-library/trimmers/technical-articles/ap_proc.pdf Does anyone know if 3296W trimpots have a linear or logarithmic response? I can't see anything...
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