Wiring the SPARK MAX
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Last updated
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12V Battery
120A Circuit Breaker
Power Distribution Panel
SPARK MAX
Brushed or Brushless Motor
USB Type-C Cable
Using a test bed is an easy way to get started with using the SPARK MAX and verify connections and code. For the initial bring up of the SPARK MAX a test bed with a single SPARK MAX, a brushless or brushed motor, and a is recommended.
The power and motor wires are permanently connected to the SPARK MAX and are not replaceable. So take care not to cut these wires too short. It is highly recommended to install connectors on these wires to simplify both the power and motor connections. A common connector used for this purpose is the Anderson Power Pole connector. Follow our guide for tips on how to properly crimp these connectors.
Make sure the power is disconnected or turned off before making any electrical connections on your test bed or robot.
Connect the integrated SPARK MAX power leads labeled V+ (red) and V- (black) to an available channel on the Power Distribution Panel. If you need to extend the length of the integrated wires, it is recommended to use 12AWG wire or larger (lower gauge number).
The first step is determining the type of motor you wish to connect. The SPARK MAX supports two types of motors: brushed DC and brushless DC. An easy way to determine the motor type is to look at the number of primary (larger) motor wires. Brushed motors only have 2 primary motor wires, while brushless motors have 3 primary wires and additional smaller sensor wires.
Connect the three motor wires; red, black, and white, to the matching SPARK MAX output wires labeled A (red), B (black), and C (white).
Next connect the NEO or NEO 550's encoder cable to the port labeled ENCODER just above the output wires.
The encoder sensor cable is required for the operation of brushless motors with SPARK MAX. The motor will not spin without it.
Connect the two motor wires, M+ (red) and M- (black), to the SPARK MAX output wires labeled A (red) and B (black).
The third output wire, labeled C (white), is not used when driving a brushed motor and should be secured and insulated. We recommend tying it back with a zip-tie and covering the end with a piece of electrical tape. Do not cut this wire in case you wish to use a brushless motor in the future. In the example below the extra unused motor wire is insulated by the white connector and secured in the block.
Carefully check all connections before continuing and verify that all colors match. The SPARK MAX can be permanently damaged if the power connection is reversed.
