Hello,

I have an arduino uno

The uno is connected to a stepper motor which is currently working fine. In the attached diagram, I have an mp3 module, push button, external computer speakers, and a 3.5 male to female stereo extension cable. I'm trying to attach everything, but have a few questions.

1. Is it feasible to use one end of a jumper wire to GND on the arduino and to cut the other end of the jumper wire off, strip the wire, and sodder it directly to GND on the mp3 card?

2. MP3 to Arduino 5V connected using M-F jumper wire. Push button 5V to Arduino 5V connected using M-F jumper wire. How do I "tie in" the male ends of 2 jumper wires to use 1 arduino 5V?

Thanks.

 

#1- sure
#2-splicing, using a breadboard, finding another 5V source, making a 5V distribution bus,etc...
Easiest for you might be to cut a jumper (leaving the end and a few inches of wire that plugs into the 5V hole on the arduino) and then making a "Y" with wire to feed your 2 devices.
something "like" this.. But split into a Y in the middle of the wire and not at the single end
http://www.cableleader.com/media/ca...d-sub-jumper-wire-y-type-male-to-two-male.jpg

 

#1- sure
#2-splicing, using a breadboard, finding another 5V source, making a 5V distribution bus,etc...
Easiest for you might be to cut a jumper (leaving the end and a few inches of wire that plugs into the 5V hole on the arduino) and then making a "Y" with wire to feed your 2 devices.
something "like" this.. But split into a Y in the middle of the wire and not at the single end
http://www.cableleader.com/media/ca...d-sub-jumper-wire-y-type-male-to-two-male.jpg

Like this?

 

yes.. but I thought you were talking about 5V not ground.. (image caption says ground)

 

yes.. but I thought you were talking about 5V not ground.. (image caption says ground)

My error it should be from 5V on the .mp3 card, not ground

 

My error it should be from 5V on the .mp3 card, not ground

Wait.. per the specs of the MP3 card... 5V ain't gonna work..

• Power supply: 6-12VDC

 

Wait.. per the specs of the MP3 card... 5V ain't gonna work..

• Power supply: 6-12VDC

I'm already using an external 9V power supply to the arduino

 

I'm already using an external 9V power supply to the arduino

Then why are you worrying about splitting the 5V to the MP3 module?
The 5V pin supplies 5V from the internal regulator..
The Vin pin will supply the voltage thats attached to the barrel jack.