# A litany of dumbassery **URL:** \ **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:** 20\ **Page:** 16
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [December 2, 2020, 5:47pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/301 "2020-12-02T17:47:02Z")
dam never thought of this hobby as being that destructive / dangerous … ---
**Author:** ![TrapaNatans](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/trapanatans/32/9318_2.png) [@TrapaNatans](https://lookmumnocomputer.discourse.group/u/TrapaNatans)\ **Post date:** [December 2, 2020, 7:35pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/302 "2020-12-02T19:35:57Z")
Finished a power supply and although I was aware that LM317 and LM337 have different pinouts I managed to swap input and output…on both. ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [December 2, 2020, 7:49pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/303 "2020-12-02T19:49:11Z")
I have done that twice. I now write in Sharpie on the heatsink and still check twice. ![IMG_20200321_170412](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/2/27306f7f8ba7f39fbed1a4d76571b565bdf8ec69.jpeg) ---
**Author:** ![TrapaNatans](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/trapanatans/32/9318_2.png) [@TrapaNatans](https://lookmumnocomputer.discourse.group/u/TrapaNatans)\ **Post date:** [December 2, 2020, 7:57pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/304 "2020-12-02T19:57:17Z")
and one of the output protection diodes was wrong as well, I wondered why the 337 immediately heated up. ---
**Author:** ![BlackDeath](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/blackdeath/32/7644_2.png) [@BlackDeath](https://lookmumnocomputer.discourse.group/u/BlackDeath)\ **Post date:** [December 2, 2020, 9:17pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/305 "2020-12-02T21:17:50Z")
Update: I have been electrocuted. In related news, my power supply works! ---
**Author:** ![eric](https://avatars.discourse-cdn.com/v4/letter/e/898d66/32.png) [@eric](https://lookmumnocomputer.discourse.group/u/eric)\ **Post date:** [December 3, 2020, 6:31am UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/306 "2020-12-03T06:31:54Z")
> **[electrocution](https://www.thefreedictionary.com/electrocution)** > > Definition, Synonyms, Translations of electrocution by The Free Dictionary I think, unless your are writing this from beyond, you got _electrified_… Most french people make the same error. ---
**Author:** ![Riggidyboo](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/riggidyboo/32/10_2.png) [@Riggidyboo](https://lookmumnocomputer.discourse.group/u/Riggidyboo)\ **Post date:** [December 3, 2020, 7:03pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/307 "2020-12-03T19:03:54Z")
I tried surface mount soldering for the 1st time last night. Made it to the 2nd component before I destroyed the board and threw everything in the garbage. ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [December 3, 2020, 8:35pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/308 "2020-12-03T20:35:36Z")
or had an electric shock. ---
**Author:** ![Bitnik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bitnik/32/274_2.png) [@Bitnik](https://lookmumnocomputer.discourse.group/u/Bitnik)\ **Post date:** [December 3, 2020, 9:58pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/309 "2020-12-03T21:58:38Z")
The word has slowly lost its association with death or killing. I remember in the sixties English usage would extend to non-fatal wounding with electricity. The word “electrification” is actually of much older provenance and has a number of competing meanings that make it a poor choice for warning notices. In parts of my home town, when you pass from an area of high Sunderland dialect to one where we speak a ditchwater-dull Northern English that can be understood outside a five mile radius of the speaker’s birthplace, there should be a sign reading: WARNING, DANGER OF ELOCUTION. ---
**Author:** ![zorch](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/zorch/32/5586_2.png) [@zorch](https://lookmumnocomputer.discourse.group/u/zorch)\ **Post date:** [December 4, 2020, 3:29pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/310 "2020-12-04T15:29:33Z")
Some day, I’ll remember that stripboard layouts are mirrored on the back side. Some day. ---
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [December 4, 2020, 7:00pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/311 "2020-12-04T19:00:29Z")
been there done that . ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [December 4, 2020, 7:01pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/312 "2020-12-04T19:01:58Z")
Well, that was dramatic ![IMG_6475](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/c/cf6af15a8a7d51b6ee59388fc04b75ce6e518913.jpeg) ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [December 4, 2020, 7:15pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/313 "2020-12-04T19:15:14Z")
Thinking this would make a great badge. How did it happen? ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [December 4, 2020, 7:15pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/314 "2020-12-04T19:15:14Z")
I think you may need to replace that. ---
**Author:** ![telec16](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/telec16/32/4510_2.png) [@telec16](https://lookmumnocomputer.discourse.group/u/telec16)\ **Post date:** [December 4, 2020, 7:20pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/315 "2020-12-04T19:20:40Z")
I bet on reversed power supply ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [December 4, 2020, 7:23pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/316 "2020-12-04T19:23:20Z")
Reversed brain … ---
**Author:** ![telec16](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/telec16/32/4510_2.png) [@telec16](https://lookmumnocomputer.discourse.group/u/telec16)\ **Post date:** [December 4, 2020, 7:25pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/317 "2020-12-04T19:25:15Z")
Been there, done that… ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [December 4, 2020, 10:59pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/318 "2020-12-04T22:59:49Z")
Also, 2N3906 differs from 2N3904 by only 2 parts in 3904, right? ---
**Author:** ![Jos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jos/32/151_2.png) [@Jos](https://lookmumnocomputer.discourse.group/u/Jos)\ **Post date:** [December 5, 2020, 2:46pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/319 "2020-12-05T14:46:11Z")
Just to be sure: do not put on your face mask ( your avatar suggest you are doing so all the time 😉 ) when trying a circuit for the first time. I can often smell that something gets hot before I see any smoke (actually I’ve only seen smoke once when I on purpose put 220VAC on a 1/8 Watt 10 ohm resistor and the results were disappointing, electronics is nothing like what you see in the movies) , and I think I wouldn’t be able to when wearing a face mask. ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [December 5, 2020, 5:17pm UTC](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526/320 "2020-12-05T17:17:19Z")
There are a number of really clever indoor fireworks, spark an smoke machines. Add a few relays, and you could have a synth session that looks like the bridge of the enterprise during almost every bloody battle. Warp speed but nae fusebox [Previous page](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526.md?page=15) [Next page](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526.md?page=17)