Once again I ordered a couple of these on Aliexpress. This time a few duds were mixed into my order. A bit annoying, but nothing serious though. 1.25% were unusable.
Being a bit paranoid about stuff I make and send out to people, I still check each an every one of them – by hand – for proper operation. Even if one looks good, it may still have issues. A “good” pogo-pin operates smoothly, a not so good one feels “scratchy” when compressed between thumb and index finger. These scratchy ones are still functional and I might use them for prototypes and throw-away stuff, but it just doesn’t feel right to pass these on to other folk.
An amazingly small tube…
…filled with a tiny spring