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To control a servomotor with your FPGA board, you are going to need a few parts.
In addition to your FPGA board you are going to need the following items to build this example project:
Although it is possible to power at least a small servomotor from the 5-V supply of your FPGA, it is better to use a separate power supply because the large startup currents can cause the FPGA to reset.
Figure 7-4 shows the project wired up on the Mojo board. Neither the Mojo nor the Papilio needs to have a shield attached. The following connections should be made:
• Negative supply lead of the servomotor (black or brown) to a GND
connection on the FPGA using a male-to-male jumper wire
• Negative connection from the screw terminal adapter to another GND connection on the FPGA
• Control lead of the servomotor (orange or yellow) to P31 (header P1 pin 1) on the Elbert 2 or P97 on the Mojo IO or P31 (header C pin 0) on the Papilio One using a male-to-male jumper wire
• Positive lead of the servomotor to the positive terminal on the screw terminal adapter
If you have a small servomotor and want to see if it will work from the Mojo or the Papilio’s 5-V power connection, you can connect the positive-supply connection lead on the servomotor directly to the board and avoid using an external power supply at all. This is shown in Figure 7-5. Note that the Elbert 2 does not have an accessible 5-V terminal.
Figures 7-6 and 7-7 show a servomotor wired to an Elbert 2 and Papilio One, respectively.
Manufacturer:Xilinx
Product Categories: FPGAs
Lifecycle:Active Active
RoHS:
Manufacturer:Xilinx
Product Categories: FPGAs
Lifecycle:Active Active
RoHS: No RoHS
Manufacturer:Xilinx
Product Categories: FPGAs
Lifecycle:Active Active
RoHS:
Manufacturer:Xilinx
Product Categories: FPGAs
Lifecycle:Active Active
RoHS:
Manufacturer:Xilinx
Product Categories:
Lifecycle:Obsolete -
RoHS: -
Support
png "A servomotor controlled by a Mojo (using external power supply)png")
png "A servomotor controlled by a Mojo (no external power supply)png")
