Hobby Components Arduino Compatible Uno+ (HCARDU0100)

[Tim Stinchcombe]

Hi,
Is the schematic for the Uno+ posted anywhere? If not could it be made available please!
Many thanks.

[andrew]

See attached:

Uno_Plus_R1_Schematic.png

[Tim Stinchcombe]

Many thanks for that - it has answered my original question. However I have another project on the go in which I expect to load the 3.3V regulator, U5, quite highly, and I'm hoping the 'spec' value of 50mA may be on the conservative side. On the Uno+ board in front of me, U5 is a SOT23-5 package (i.e. 5 pins), and so doesn't appear to conform exactly to that schematic; it is marked '4B2X' which leads me to a Torex XC6204B, for which the max output is 150mA, i.e. much more to my liking! Please can you confirm if I have correctly ID'ed the chip, and if not, let me know its exact designation?

Thanks.

[andrew]

it is marked '4B2X' which leads me to a Torex XC6204B, for which the max output is 150mA, i.e. much more to my liking! Please can you confirm if I have correctly ID'ed the chip, and if not, let me know its exact designation?

Yes that is the correct part for our current stock.

With regulators or any other power electronics generally their limiting factor is how much heat they can dissipate. Also note that especially with regulators each datasheet parameter is given for the ideal conditions for that particular parameter. So in situations like this I always suggest using a literal rule of thumb in that if it’s too hot to the touch then you are likely overloading it, and if it’s cool or just warm it should be fine.

[Tim Stinchcombe]

Yes that is the correct part for our current stock.

Great - thanks for confirming.

So in situations like this I always suggest using a literal rule of thumb in that if it’s too hot to the touch then you are likely overloading it, and if it’s cool or just warm it should be fine.

That will pretty much be my yardstick!

Thanks, Tim.