This header provides the three SPI data lines on D11-D13 as well as D10 for an SD Card Select line and power and ground. The analog inputs can also be used as additional digital I/O lines. This group of headers simply brings out the A0 thru A5 Analog I/O lines and couples them with a dedicated ground and VCC pin. AREF is the analog reference voltage for the Arduino ADC. V = Vcc (Source determined by SEL jumper)Īlso note that AREF is brought on this line of headers.The SEL jumper determines the power that is supplied to the VCC pins as noted above. This group of headers simply brings out the D0 thru D13 Digital I/O lines and couples them with a dedicated ground and VCC pin. Note: With the SEL jumper installed, there must not be external power applied to the 2-pos screw terminal or damage may result since it will short the external and on-board power systems together. Typically 5-6V for servos, but can be other voltage as required by the system. VCC = Positive voltage from separate power supply.This is commonly used when servo motors are being driven so that they can be powered from a separate power supply since they exceed the current capability of the built-in 5V and the servo motors create too much electrical noise back into the Arduino electrical system. SEL jumper removed = The Arduino 5V power is removed and the power for the pins must be supplied by a separate power supply connected to the 2-pos screw terminal. This mode facilitates using digital sensors and other low power I/O. SEL jumper installed = The Arduino 5V power is connected to these pins as well. The VCC pins associated with D0-D13 are controlled by the SEL jumper. Sensors generally need as clean of power as possible, so keeping these on the Arduino 5V makes sense.
The VCC pins associated with A0-A5 as well as the misc I/O connectors are all hardwired to the Arduino 5V power. One of the benefits of this shield is that it brings each of the standard Arduino I/O pins out to 3-pin headers along with a dedicated Ground and Vcc pin. It also brings the on-board pin-13 ‘L’ LED up to the shield for easy visibility. The shield also has a number of dedicated connectors that are defined for specific purposes as outlined below, but they can also be considered as general purpose connection points.Īn auxiliary power connector allows separate power to be supplied to the power pins associated with the D0-D13 pins which is handy for driving servo motors.Ī remote reset switch is located on the shield for easy access. This shield brings out the standard Arduino I/O pins to headers along with dedicated ground and power pins per I/O to facilitate connecting sensors other devices. The Sensor Shield V5.0 fits Uno, Mega 2560 and similar form-factor Arduino boards and provides a convenient way to interface to sensors and other peripherals such as servo motors.
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