Since I am a newbie in electronics, not have depth knowledge about electronic schemas, hope that someone can help me out here.
I wanted to give power for my arduino project without using battery, but instead I prefer using available power source from house electricity.
Arduino project usually require 3V or 5V DC, so I want to purchase a transformer used to power LED exactly like this one:
Do you think using this transformer safe enough for the arduino project? I do not need to be perfect, but at least it can give power safely for the arduino electronic parts (say maybe can survived two or three month usage before it burnt out?)
I know the link I give above does not have schematics available, general opinions from the forum member (which is much more experience than me) are very appreciate.
Looks good to me. If you power Arduino via VIN/DC Jack then voltage should be more than 6v. I used a wall adapter with 12v output to power my Arduino Nano.
Edit: Make sure you measure the voltage before connecting to Arduino.
Thanks Allan for the response, but what I want is it can be embedded (soldered directly) to the main board, my simple plan just purchase that part and then join it with my project board using two short cables (the DC side) and the other end (the AC side) will go to house electricity plug. With this plan then I can put together transformer board and my project board in one case (of course I will make sure it is isolated properly).
That board in the first post is a constant current LED supply.
NOT a constant voltage supply, so not ok to power an Arduino.
Unloaded output voltage of that board could be very high, and fry the Arduino.
Connecting a bare board to mains power is also dangerous.
A safe/easy/cheap way to power an Arduino is a 5volt cellphone charger.
One with a USB socket, or with a micro-USB lead if it's a Nano.
Just plug the USB lead from the Arduino into the USB socket of the charger.
Leo..
I would not use that transformer. The output current is barely sufficient as you would need a separate additional regulator to give you a stable voltage. The transformer output voltage could likely be too low.
It is impossible to tell whether the illustrated unit is safe because there is no picture detailing separation between mains and low voltage. However, as has been said it is a constant current driver unit so totally unsuitable for driving any form of micro. As others have said, obtain a proper 'wallwart'
No, that is completely wrong, its a constant current supply for LEDs, no use at all.
Constant current supplies supply a constant current, which means the voltage will rise to whatever it
needs to be, thus blowing up anything expecting a constant voltage.
A standard USB 5V phone charger is one good option. Constant voltage, 5V, plug into the usb socket
on the Arduino.
Thanks a lot for all of you... so I see.. it is constant current... will blow up everything... OK I will not puchase this one. I think will follow your suggestion to use standard usb 5v charger, will try to find a smaller one and cheap then will tear the case and take out the board to join with my board in my own case
Thank you guys!
benny_0924:
I think will follow your suggestion to use standard usb 5v charger, will try to find a smaller one and cheap then will tear the case and take out the board to join with my board in my own case
There are constant voltage supplies like the one you linked to if you have to use a bare board.
Like this one.
Take care. Don't kill others.
Leo..
@MarkT, I am not really sure if protective earth is required or not, but I will definitely playing safe, will not try to kill myself or other
@Wawa, thanks for the link. Unfortunately I cannot find the one in my local country online shop, and I will not buy from other country as the shipping (and customs) cost will be more than the module cost. But I will try to find the schematic and find all the parts in my local electronic supplier then build it myself.
