Hi,
I purchased this breadboard power supply
http://www.dfrobot.com/index.php?route=product/product&filter_name=breadboard%20power%20supply&page=2&product_id=488
and thought it was a 3.3V or 5V selectable power supply but found out that it output both 5V & 3.3V simultaneously to both sides of the breadboard power rails..
As my projects are usually needed 5V on both the power rails, I use a wire to connect the 5V power rails to the 3.3V rails...
Measured the voltage on the 3.3V power rails and it reads 5V. No problem. Not using any 3.3V on the rails..
My questions / concerns :-
1. Are there any issues or concerns with this type connection ? (5V on top of 3.3V)
2. Will it damage the 3.3V side of the output supply / voltage regulator ?
3. Any alternative or safer ways to do it ?
The 4x2 male header pins are just additional power pins , 2 pairs for 5V and 2 pairs for 3.3V, not voltage selector using a jumper.
Thanks for reading ...