Originally shared by Cristian Martinez So like Arduino nano V3's are really cheap to

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Originally shared by Cristian Martinez

So like Arduino nano V3’s are really cheap to buy righr now. But im having the hardest time finding a good power supply that doesnt cost me as much as 3 Arduino’s. Any suggestions? Im in the USA

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Keywords are TSP-05, HLK-PM01

https://m.aliexpress.com/item/32408565688.html

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I was looking for something with a mini USB plug

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I buy Arduino Nano’s with the mini USB plug and then use cheap USB power banks to run them. Have about 30-40 portable lanterns with that arrangement.

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@Cristian_Martinez are you looking for portable (ie battery) or AC (ie with a 110V plug)?

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Looking for AC. Making some decorations that need to run on 5V constantly so replacing batteries isnt really something i wanna deal with lol

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@Cristian_Martinez search for phone charger, there are plenty of those with usb port, all you need to add is usb to microusb cable, if it’s not included. Prices start from $1. For example, if you need plenty, https://www.ebay.com/p/1a-USB-Power-Adapter-AC-Home-Wall-Charger-US-Plug-for-iPhone-5-5s-6-Samsung-Full-White/2072214445

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Or this (comes with cable attached but I’d rather have it separate): https://www.ebay.com/p/5-Rapid-Micro-USB-Battery-Home-Wall-Travel-AC-Charger-for-Android-Cell-Phone/1839774323

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@Kirill_Kolyshkin Your second one has micro USB, which is NOT what he wants. He wants mini USB for the Arduino Nano’s.

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@Andrew_Tuline my bad, I haven’t realized miniusb is still a thing. I have a few boards with miniusb but do not use those because, well, miniusb.

Lately I’m mostly using modules with usb male port, plugging it directly to the laptop for programming/debug and directly to a power bank or power supply when running. Something like this (atmega32u4 based):

missing/deleted image from Google+

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…or this (attiny85 based):
missing/deleted image from Google+

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@Kirill_Kolyshkin which is probably why the nano V3 is so cheap to buy now lol. I usually use my custom boards which have built in LiPo battery chargers and a micro USB port. But for this particular project i need low cost boards. The nano V3 is cheaper than my boards and i bought a bunch so now i need to use them lol

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Just cut the mini usb cable and solder wires directly to raw pin. :slight_smile:

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@Thomas_Runge I guess soldering is out of the question, otherwise those modules from my first comment could be used, soldered directly to Nano’s VIN and GND pins.

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I have a bunch of USB micros laying around. Unfortunately you cant just swap a mini for a micro. The pads dont match up lol

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There’s always these, I’m sure you can find them cheaper if you look hard enough.

10pcs/bag Micro USB Female to Mini USB Male Data Charging Adapter
http://s.aliexpress.com/mIbmeuiu?fromSns=Copy

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@Kirill_Kolyshkin you got a link to these?

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@Cristian_Martinez atmega32u8 based are somewhat expensive, around $5: https://m.aliexpress.com/item/32775118410.html

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@Cristian_Martinez attiny85 are cheap https://m.aliexpress.com/item/32684577133.html

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Tinies are very ram limited. The end is at ~100 pixels with almost no space left for code and data.