# Donation: three wall-wart power supplies

**URL:** <https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035>\
**Category:** Discussion\
**Tags:** donations\
**Created:** [7 November 2017 15:12 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035 "2017-11-07T15:12:15Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![fincheee](https://discourse.southlondonmakerspace.org/user_avatar/discourse.southlondonmakerspace.org/fincheee/32/4423_2.png) [@fincheee](https://discourse.southlondonmakerspace.org/u/fincheee)\
**Post date:** [7 November 2017 15:12 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035/1 "2017-11-07T15:12:15Z")

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Hi [@electrotechs](https://discourse.southlondonmakerspace.org/groups/electrotechs),

I found three wall wart AC adapters today, all 110 - 240 v:

1. 12v 2 amp (center positive). No idea what it came from.

2. 5v 300mA, looks like an old mobile phone charging plug on the end.

3. 12v 1200mA from an old D-Link WiFi router

Don’t know if anyone can use these, I left them on the second shelf up from the floor underneath the Mac in the electronic area. I will throw them away if nobody has a use for them, but you never know.

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**Author:** ![emuboy](https://discourse.southlondonmakerspace.org/user_avatar/discourse.southlondonmakerspace.org/emuboy/32/16794_2.png) [@emuboy](https://discourse.southlondonmakerspace.org/u/emuboy)\
**Post date:** [7 November 2017 15:34 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035/2 "2017-11-07T15:34:30Z")

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The 5v is pretty useless nowadays but the 12v are always useful, thanks for that!

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**Author:** ![fincheee](https://discourse.southlondonmakerspace.org/user_avatar/discourse.southlondonmakerspace.org/fincheee/32/4423_2.png) [@fincheee](https://discourse.southlondonmakerspace.org/u/fincheee)\
**Post date:** [7 November 2017 15:38 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035/3 "2017-11-07T15:38:13Z")

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I was thinking about using the 5v for DC supply for Arduino etc. but never got around to it.

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**Author:** ![emuboy](https://discourse.southlondonmakerspace.org/user_avatar/discourse.southlondonmakerspace.org/emuboy/32/16794_2.png) [@emuboy](https://discourse.southlondonmakerspace.org/u/emuboy)\
**Post date:** [7 November 2017 15:52 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035/4 "2017-11-07T15:52:30Z")

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Fair enough 🙂

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**Author:** ![unknowndomain](https://discourse.southlondonmakerspace.org/user_avatar/discourse.southlondonmakerspace.org/unknowndomain/32/30593_2.png) [@unknowndomain](https://discourse.southlondonmakerspace.org/u/unknowndomain)\
**Post date:** [7 November 2017 17:44 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035/5 "2017-11-07T17:44:38Z")

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5V not so good for Arduino because it has a voltage regulator but for NeoPixels.

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**Author:** ![Matthew](https://discourse.southlondonmakerspace.org/letter_avatar/matthew/32/5_5575768a8748004e209b776fc1b2916d.png) [@Matthew](https://discourse.southlondonmakerspace.org/u/Matthew)\
**Post date:** [13 September 2018 16:48 UTC](https://discourse.southlondonmakerspace.org/t/donation-three-wall-wart-power-supplies/8035/6 "2018-09-13T16:48:20Z")

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The cheap as chips ATMEGA328 Nano boards have a regulator, but the USB power feed bypasses this so they’re happy to work from a 5V adaptor. [http://actrl.cz/blog/wp-content/uploads/nano\_ch340\_schematics-rev1.pdf](http://actrl.cz/blog/wp-content/uploads/nano_ch340_schematics-rev1.pdf)