230V power supply to Arduino

[marceltrapman]

@axillent said:

the case developed for a particular custom made PCB

I understand but the design is still a good starting point :)

[axillent]

@marceltrapman sure, just give me some time to publish it on thingerverse

[marceltrapman]

Nice, thanks...

[Magiske]

Was looking into the same and ordered 2 different 230/110v to 5v of ebay to get a cheap 5v powersource. Just got them today.

The White around $1.5 and the Black was $1.0

Before wirering everything up, I just added the smaller white's pcb to the black case incl. radio and pro mini. And there is room for a bit more.
So unless it goes up in flames I will try to create a default sensor node.

[Vladut Grecu]

If you don`t go over 50-60% of the amps that that charger can output, there will be no problems. I suggest you replace the capacitor on the 5V area with a bigger one and change the 220/110v capacitor with a higher quality one. What I figure from your pictures is that the black charger doesn't have a bridge rectifier.. It's safer for you to use one. (Don't forget about the fuse)

[ferpando]

Anyone tested one of these cheap power supplies with an osciloscope?
I got a couple yesterday but not sure if they are good enough

[gadu]

I've seen these and also got interested. Any input on these is appreciated.

[Jan Gatzke]

@Magiske I am using a power supply similar to the black one. My one has a fake optocoupler. The output voltage is unregulated. Have a close look before using this pcb. ;)

[Roberto Brunialti]

May be too big or too expansive... but it is for sure a good (and safe...) product with a 33x22 mm footprint..

http://www.mouser.com/ProductDetail/RECOM-Power/RAC01-33SC/?qs=waQl70lBfV2Z5QQrs%2FIAaw%3D%3D

[Jan Gatzke]

Does it fit on 2.54 mm prototype boards?

[Didi]

Yes it does.
Look data sheet http://www.mouser.com/ds/2/468/RAC01_02-SC-16262.pdf

[Roberto Brunialti]

I've got a couple of them (3.3 and 5 V models), the wired models. Just received. Still to test...

[scalz]

you can disassemble some components like transformer and cap. So you can make your own mysensors design and you get very small and cheap transformer. I can't find cheaper I think. or maybe on alibaba!
I have these http://fr.aliexpress.com/item/AC-220V-DC-3V-10V-5V-9V-1w-1x1w-2w-2x1w-3w-3x1w-Constant-Current-Constant/1900256299.html?recommendVersion=1

[msebbe]

@scalz said:

you can disassemble some components like transformer and cap. So you can make your own mysensors design and you get very small and cheap transformer. I can't find cheaper I think. or maybe on alibaba!
I have these http://fr.aliexpress.com/item/AC-220V-DC-3V-10V-5V-9V-1w-1x1w-2w-2x1w-3w-3x1w-Constant-Current-Constant/1900256299.html?recommendVersion=1

Can this convert 230v to 5v and supply enough power for say an pro mini with motion sensor?

[scalz]

@msebbe : yes it can.

[Moshe Livne]

@scalz these are constant current. how come they supply constant voltage?

[scalz]

@Moshe Livne: when I tested it, it was with atmel standalone. So I added a voltage regulator. And you can add a little filter if you want..

[Moshe Livne]

@scalz Oh I see. Thanks!

[axillent]

@scalz said:

I have these http://fr.aliexpress.com/item/AC-220V-DC-3V-10V-5V-9V-1w-1x1w-2w-2x1w-3w-3x1w-Constant-Current-Constant/1900256299.html?recommendVersion=1

I'm using similar one, it is also called 3 x1 W Led driver and by my measurements provides 300mA and 17V without load

I use 220uF to filter its output and I use 78L05 to regulate down to 5V. This can give up to 5V@40mA output. The restriction is a heating desipation rating for 78L05.
For higher loads I would recomment to use DC stepdown. With DC stepdown you can get up to 5V@650mA with 80% efficiency

[scalz]

Sorry for my imprecision. So I agree with @axillent . If it is just for a motion, it should do the trick. But for higher loads, you should add a dc dc step down or use a better thing.