Smoke test

nounShop talkPCBs

First power-up of a new board, usually current-limited, to see whether anything overheats or burns.

A smoke test is the first time power goes onto a newly assembled board, normally from a bench supply with a low current limit, while the engineer watches the current, feels for hot parts and sniffs for burning. Passing only means nothing failed catastrophically. Software teams use the term for any quick basic check, but on the bench it means watching for actual smoke.

Heard on the job

Smoke test passed at a 100 mA limit and the rails are up, now let's see if the processor boots.

Also heard as

  • power-on test
  • first power-up
  • smoke check