Author Topic: Many Op-amps suddenly dead  (Read 1793 times)

0 Members and 1 Guest are viewing this topic.

Offline DannyxTopic starter

  • Regular Contributor
  • *
  • Posts: 83
  • Country: ro
  • CertifiedAxhole
Re: Many Op-amps suddenly dead
« Reply #25 on: May 31, 2024, 10:27:04 am »
Sorry for the late reply.
To answer your question, that would be because the output of the resistor divider formed by the pot would drift up/down with the supply voltage. At least that's what I noticed during testing. Makes sense, since there's no regulation whatsoever.

Back to the matter at hand: today I tested the 393 again, properly this time, WITH a pull-up resistor on the output and 2.2k resistors on the inputs and indeed it works: if I pull the N/I input to the supply rail, while leaving the other input grounded, the output gets pulled high. If I pull the N/I input to GND, the output also gets pulled low, so it survived, even with me abusing it :D
The following users thanked this post: thm_w, BILLPOD

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo