Does The Line Tracker need a Current Limiting Resistor?

The VEX Line Tracker is proving to be a very useful sensor for some non-VRC projects where I work.

In one project we intend to connect the Line Tracker to an Arduino Ethernet microcontroller.

I am curious if the Line Tracker will always have some minimum resistance I can count on to limit the current it lets pass through itself, or if I need to supply a current limiting resistor between the Arduino and the Line Tracker (to replace current-limiting circuitry that is inside the VEX Microcontroller in an all-VEX set-up)?

Thanks in advance,


While we cannot always guarantee that VEX Robotics items will work in applications outside the VEX Robotics Design System, this item will always have some internal current limiting resistance (of at least 200 ohms) to protect itself. It is designed to work well with 5V and 3.3V microcontrollers.


Thank You Eli - That is the info I need. - Blake