How assumptions can lead to self-immolation of your work project

RE: How assumptions can lead to self-immolation of your work project

dougw — Wed, 09 Sep 2020 21:15:18 GMT

I have run into this before with audio connectors and been perplexed as to why they chose a nonintuitive (aggravating) pin position.

I am not saying I got bitten by this problem, although I might have and just conveniently "forgotten" about it or more probably blotted the embarrassment from my memory.

The one I took apart needed the extra distance from the actual contact point to allow room for the length of the cantilever contact spring.

RE: How assumptions can lead to self-immolation of your work project

neilk — Wed, 09 Sep 2020 20:56:51 GMT

Martin, that's a really scary story! Glad you sorted it out.

I have used 2.5mm jacks in a similar way to you - Vcc, signal, ground. I always spend ages with the meter checking and double checking what connects to where!

Neil

RE: How assumptions can lead to self-immolation of your work project

jw0752 — Wed, 09 Sep 2020 19:53:01 GMT

Hi Martin,

Excellent story and example of how the simple things can try to fool one into believing in "magic". Welcome to the forum and I hope you continue to post your adventures here. It seems you will fit in well as your story or something similar has been posted at one time or another by most of the guys here. In fact a my own similar story was what brought me to this forum 7 years ago. That is when I learned that prototype designs on a bread board do not always translate accurately to soldered prototypes.

John