# Throttle Input

![](https://lh5.googleusercontent.com/ZZ80DKpSIDq_BIzbv4uH4nYnioSEmAR0fajAoG0SSrN1zo3pzzHG_jTPJiBhohvIJzJBwHMSHbvjjYH8JP9PpJ3dIKFYpEjQlw3OQqrrHCl8tW_lE26jNz0cC21xKX3Nmvy_BNIr)

The throttle connector provides 5V and ground for the external throttle, plus a signal connection to the Arduino through a 1k protection resistor.

This resistor helps limit fault current into the Arduino input pin during wiring mistakes, but it is not a full overvoltage clamp.

For wiring methods and voltage-limiting guidance, see [Throttle Input](/connecting-the-echook-to-the-car/throttle-input.md).


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