Make: Volume 87

row and column. Connect the opposite clip to a

jumper wire that you’ll connect to your Arduino.

If you’re using a Loomia matrix, you can cover the

through-hole pads with tape (or snip them off)

and attach 6 alligator clips (Figure

G

).

To wire the circuit, you must connect each row

and column correctly. We’ll make all the rows

Analog, and all the columns Digital. I’ve used an

Adafruit Flora because it’s made to attach alligator

clips, and it’s round which is great for soft circuits

(Figure

H

). But this concept will work with any

similar microcontroller; just check your pinout

diagram to find digital and analog pins (Figure

I

).

D E

F G

H

I

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