N0YWB

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N0YWB

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  • 02.17.2016
  • Designing in ESD ruggedness
  • In the early '80s, I had to convince management of the electronics manufacturing facility that it was necessary to switch from pink poly antistatic to metallizied static shielding bags, a $100k unbudgeted expenditure. To make my case, I severed the lands across the middle of a double-sided circuit board, bridged the lands together and solderd a neon bulb across the dipole. I placed a photocell against the neon bulb and sealed ambient light out with black electrical tape. The photocell was connected to a small audio amplifier and speaker. The speaker would pop whenever the neon bulb flashed. The board in a pink poly bag would squeal as it passed through a series of 60 Volt gradients as the board was passed from one manager to another. Nothing was heard when the board was in a static shielding bag. The expenditure was approved immediately.