Data Sheet

About Your Snapino
TM
Parts
U31 Snapino
TM
module snap connections:
(+) - power
(−) - power
A0 - Analog input
D9-D11 - Digital inputs/outputs
Note: Snapino
TM
does not have an on/off switch
when powered using the USB cable. To turn it off,
disconnect the USB cable from your computer.
Note: There is additional Arduino information
at www.arduino.cc, including a schematic for
the Arduino UNO.
The USB cable is used
to program and
communicate with the
Snapino
TM
module
(U31).
CABLE
SNAPINO
TM
MODULE
The Snapino
TM
module (U31) includes an Arduino
UNO circuit board. This is a mini computer which
can be programmed to perform different tasks,
including monitoring things and making things
happen.
Notes for using the SNAPINO
TM
module in
other applications:
Power source:
Snapino
TM
should ONLY be powered using a
USB cable, the 9V battery holder included in
the set, or an AC adapter with 9V output (not
included). Snapino
TM
should NEVER be used
with Snap Circuits
®
battery holders from other
sets or other power sources.
Analog inputs (snap A0, or pins A0-A5 on
thecircuit board):
These can measure voltage with 10-bit accuracy
(1024 levels). They can also be configured to act
as additional digital inputs/outputs.
Digital inputs/outputs (snaps D9-D11, or
pins 0-13 on the circuit board):
When configured as inputs the voltages should
be above 80% of the power source voltage to
be high, or below 20% of the power source
voltage to be low. When configured as outputs
each can supply or receive up to 20 mA; this
is enough to light an LED, but an interface
transistor may be needed when controlling a
motor or speaker. Some of these (3, 5, 6, 9, 10,
and 11) can be configured to simulate analog
outputs using Pulse Width Modulation (PWM).
Other pins on the circuit board can be accessed
using snap-to-pin wires; see the Arduino
website (www.arduino.cc) for more information.
RESISTORS
Resistors “resist” the flow of electricity and are
used to control or limit the current in a circuit. This
set includes a 10kW resistor (R4) (“k” symbolizes
1,000, so R4 is really 10,000W). Materials like
metal have very low resistance (<1W), while
materials like paper, plastic, and air have near-
infinite resistance. Increasing circuit resistance
reduces the flow of electricity.
-5-
10kW Resistor (R4)
USB Cable
Snapino
TM
module (U31)
The phototransistor (Q4) is a transistor that
uses light to control electric current.
Phototransistor
(Q4)
PHOTOTRANSISTOR
SCSNAPINO_Manual_112816.qxp 12/30/16 2:00 PM Page 6