gShield v5 Notes

Differences Between the v4 and v5

There are almost no differences between the v4 and v5 gShield. The v5 provides some additional options for selecting logic power for compatibility with a large array of Arduinos and Arduino clones. This does not affect the motor power, which is the same on all gShield versions (v1 - v5).

##v5 Logic Power Jumper Options The v5 is compatible with R3 Unos and other R3 Arduinos, including the Arduino Due. Most Arduinos shipped in the last year or so are R3s, and look something like this:

You can tell if your Arduino has an R3 pinout if the power connector (bottom left) has 8 pins. If this is true you don't need to change anything. (Please note, some clones - such as the Seeduino - also have 8 position connectors but are not R3 pinout and do not provide the IOREF signal on Pin 1. Please see the 5v power section, below.)

Earlier revisions (R2) have 6 pin power connectors. In this case when you plug on the gShield there are 2 pins hanging in mid-air. This is OK, but you need to reconnect the power. See "5v Power", below. If you have an R3. If you have an older Arduino or a clone you may need to change the logic power jumper.

The power selection section is the J11 jumper right under the left-most motor connector in the picture above. The power section has 3 positions:

• Left Position (Factory jumper position) - connects to IOREF
• Middle Position - connects to 3.3 volts
• Right Position - connects to 5 volts

IOREF Power (Left Position, Factory jumper position)

In the factory shipped position shown above the board power is provided from the IOREF pin of the Arduino. This is what you want if the Arduino has an R3 pinout

3.3 Volt Power (Middle Position)

Most applications will not use this position. But it's available because it is an option

###5 Volt Power (Right Position) If you have an R2 Arduino, or a clone that does not provide IOREF you will need to move the jumper from the left position to this right-most position - i.e.