Cheap Arduino Power?
- Thread starter honcho12
- Start date
Besides a wall plug usb supply? Those go for as cheap as 1$ in some places.
Else you can use a pcb mount power supply such as the RAC01-05SC or RAC02-05SC (one provides 5V 200mA, the other 5V 400mA, both with an input of 80-240V AC). But the safest way would be to make a transformer and a linear circuit. I'd say go for the usb charger thingy.
I've picked up some wall power USB adaptors for as low as ~$3 in the past.
I don't generally trust the voltage supply being stable for anything below $10.
Past experience testing them has shown that the really cheap stuff is ~5v +/- 2v fluctuations
I don't generally trust the voltage supply being stable for anything below $10.
Past experience testing them has shown that the really cheap stuff is ~5v +/- 2v fluctuations
UnderSc0re
Space Marshal
I would probably spend the $5 or more and not risk getting a crappy one that could damage your board. I had a similar dilemma when building my "$29" raspberry pi computer.
I grow up using these in my projects, but now a days the ma is to low for things I like to do but 500 ma is enough for what you want right? and also this you can use on other things when you need something.
http://www.amazon.com/Seven-Star-Regulated-Universal-Converter/dp/B005IDTH76/ref=sr_1_3?ie=UTF8&qid=1436215567&sr=8-3&keywords=120v+to+5v
http://www.amazon.com/Seven-Star-Regulated-Universal-Converter/dp/B005IDTH76/ref=sr_1_3?ie=UTF8&qid=1436215567&sr=8-3&keywords=120v+to+5v
Slansickness
Space Marshal
The cheapest you could use would probably be a phone charger if you have a few laying around like I do. If you are concerned about poor regulation, clamp the voltage with a 5v zener and a resistor, less than $1 if you have a local source.
You may want to check out this article with a helpful video that explains what bridge rectifiers are and how the work https://www.derf.com/how-a-bridge-rectifier-works-step-by-step-tutorial/