Using a 5V Regulator to Power the Mechaduino from Motor power only

[Max Borhof]

Hi,

i am workling on a StepStick compatible interface between the Mechaduino and my 3D Printer with a RADDS 1.5 Controller. 

To keep Things simple, i would like to use a R-78E5.0-1.0 Regulator to power the Mechaduino from Motor Power only.

Like you can see in the attached diagram I have solderd the +Vin,GND and +Vout Pins of the regulator to the V+ (Motor Powert), GND and Vin (5V) pins on the Mechaduino. I just want to make sure that i have placed the Regulator correctly.

Cheers!

Max

[Max Borhof]

Turns out it works perfectly :-)  It schoul be added to the manual. ;-)

[3d.m...@gmail.com]

I believe it was designed with this in mind.  I did see a note about it somewhere.  An LM7805 regulator works fine too, since the board does not pull that much current, so you don't have to use a more expensive switchmode regulator.

[amoskst...@gmail.com]

What is the R-78E5.0-1.0 Regulator for, this stuff is soo confusing. 

[3d.m...@gmail.com]

The regulator is used if you want to power the board from the motor supply only.  Otherwise you need to connect a source of 5V to power the rest of the board.

[amoskst...@gmail.com]

Did you connect the enable pin?

[lucas...@gmail.com]

What happens with the USB connection when the regulator is present? Can I still use it?

I mean 12v power and USB connected at the same time.

I didn't analyze the circuit, but it should have a power input selector as the Arduino has.

I don't want to burn my PC's USB port ;)