The DIY relay box and its stomach contents!
Far view on the external relay box (side 1)
Originally uploaded by cultured_society2nd
Well here it is! A custom made box for the 4 channel relay card. My plan was to store the relay card in a proper way, can’t just have the card shown bare shish! But hey again the relay card will not work if i just put it in the box DOH! 
Output connections on the relay box
So it will work the same way on how the 4 channel relay card works, it has 4 inputs/outputs with negative/positive terminals. It works with a 12V AC/DC adapter. I chose speaker terminal wire connector to simply connect wire input/outputs and had a AC/DC female adapter connection on the box.
Alright! Lets take a peek inside!
A peek on relay card in a black box
PEEKABOO!
Far view on the internal relay box
Well it looks neat heh?
Four sets of relay internal output connection
This part is a little fancy in its soldered connections, in addition it was custom hacked that the internal 12V DC will run on parallel through all 4 output relay connections. The good part is that the device connected will be fed with the free DC power supply, but only with any device that is capable on 12V DC.
Internal output connections to terminal clips
An interface device output will be connected to the relay input connections. I thought the speaker terminal clips was too big for the box but I am lucky ha ha!
Relay internal input connections (View 1)
Why the orange wire connected in series you ask? Well it was meant for the ground input connections, the relay card only installed one way connection on ground “negative polarity”. The relay output is for the custom made 4 solenoids xylophone player.
Relay internal input connections (View 2)
See those yellow and brown wire? I had removed all 4 small red led stock indicators…why!? It would be nice if I notice the indicator plus in a blue color outside the box; showing that it works ha ha 
4 external LED relay input connection indicator
Used a small PCB to place all 4 new small blue led to indicate the input connection through the 4 channel relay card.
