Hardware Reference
In-Depth Information
AREF
GND
D13
D12
D11/PWM
D10/PWM
D9/PWM
D8
Figure 3-10
The cat-sensing circuit.
Because all of the force-
sensing resistors are wired
in parallel, there are only
two connections for all
of them. This circuit is
simple enough that you
can just solder a resistor to
a header pin to make the
connection to ground.
Reset
+3.3V
+5V
Gnd
Gnd
Vin
Arduino
Module
4 force-sensing
resistors
D7
D6/PWM
D5/PWM
D4
D3/PWM
D2
Digital1/TX
Digital0/RX
Analog0
A1
A2
A3
A4
A5
!
You may need a
higher value depending on the
resistance range of your force-
sensing resistors and the weight
of your cat. If a 1K resistor
doesn't give you good values,
try a 4.7K or a 10K resistor. The
photo here shows a 10K resistor.
1K
Ω
