# A litany of dumbassery

**URL:** <https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526>\
**Category:** Uncategorized\
**Created:** [April 4, 2020, 9:42pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526 "2020-04-04T21:42:52Z")\
**Posts on this page:** 1\
**Showing post:** 75

<div class="post-metadata">

**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\
**Post date:** [June 13, 2020, 1:26am UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/75 "2020-06-13T01:26:20Z")

</div>

OK, today was the next episode in the [ongoing saga](https://lookmumnocomputer.discourse.group/t/first-pcb-prototype-attempt/596/28) of fredrik & the opamps: turns out that if you need your opamp to work as a non-inverting amplifier, you shouldn’t connect the feedback to the positive input, because that turns it into something else 🤦‍♀️

(luckily I have plenty of PCBs where I didn’t mess up the opamps, otherwise you’d think someone was trying to tell me something 😃)

(also, it was an old PCB that I just hadn’t gotten around to test. I think I’ve gotten more careful…)

---

_[View the full topic](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526)._