VEX V5 Brain
The VEX V5 Brain is the successor to the VEX Cortex and is the current electronics system used in competitive VEX.
The V5 Brain

Product Specs

V5 Robot Brain Specifications
Motor Ports
Any of the 21 Smart Ports
Smart Sensor Ports
Any of the 21 Smart Ports
Digital Ports
Any of the 8 built-in 3-Wire Ports
Analog Ports
Any of the 8 built-in 3-Wire Ports
VEXos Processor
  • One Cortex A9 at 667 MHz
  • Two Cortex M0 at 32 MHz each
  • One FPGA1
User Processor
One Cortex A9 1333 Million Instructions per second (MIPS)
128 MB
32 MB
User Program Slots
2.0 High Speed (480 Mbit/s)
Color Touch Screen
4.25”, 480 x 272 pixels, 65k colors
up to 16 GB, FAT32
VEXnet 3.0 and Bluetooth 4.2
System Voltage
12.8 V
4.0” W x 5.5” H x 1.3” L (101.6 mm x 139.7 mm x 33.02 mm)
0.63 lbs (285g)


  • Select and run one of 8 user programs
  • Run built-in VEX programs
  • Run practice matches
  • Dark and Light Modes
  • Screen rotation
  • Dashboards
There is a built in dashboard for every connected sensor and device, from switches and potentiometers all the way up to motors and the battery.
Motor Dashboard

3 Wire

The V5 Brain still has support for 3 wire devices. 3-Wire ports are now multi-purpose. Any 3-Wire port can be a digital input, digital output, analog input, or PWM motor control. A dedicated Cortex M0 microcontroller has the sole responsibility of reading inputs and toggling outputs. The data is reported to the user the moment it is measured. This means digital input changes trigger an immediate interrupt-based message to the user sensor memory to minimize latency. Analog inputs are pre-filtered for 5 milliseconds and then moved to the user sensor memory on a continual basis. The analog input is now 0-5V compatible to expand the number of compatible sensors. Future enhancements to the 3-Wire ports are planned to allow I2C and UART communication to non-VEX sensors as well.
3-Wire Specifications
V5 3-Wire Ports
Digital Ports
Use any of the 8 built-in 3-Wire Ports
Analog Ports
Use any of the 8 built-in 3-Wire Ports
3-Wire Expansion
Add 8 more ports using a 3-Wire Expander. The 3-Wire Expander uses one Smart Port.
Message rate - digital
On Change up to 1 kHz
Message rate - analog
5 mSec
Digital Input
High = 2.4 - 5.5 V Low = 0.0 - 1.0 V
Digital Output
High = 2.9 V min into a high impedance Low = 0.4 V max into a high impedance
Analog Input
0 - 5 V
Analog Input Resolution
Power out
5v @ 2A total for all ports


The V5 has has some issues and other setback more can be seen in V5 Electronics Observations.


VEX has stated that the V5 will bring a new batch of smart sensors:
  • LiDAR
  • The Bluetooth radio unlocks the ability of robot-to-robot communications along with custom iOS and Android apps written by users.

Teams Contributed to this Article:

  • BLRS (Purdue SIGBots)