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Alex B.
2025-07-05 22:48:29 -04:00
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ESP-IDF_Robot/tutorial/docs/source/overview.rst
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@@ -27,6 +27,12 @@ Based on this constraint, the RC car can only move front, back, and turn/rotate
.. note::
What is PWM?
PWM (Pulse Width Modulation) is a technique used to simulate analog voltage levels using digital signals. It works by rapidly switching a
digital pin between HIGH (on) and LOW (off) states at a fixed frequency. The duty cycle—the percentage of time the signal is HIGH in one
cycle—determines the effective voltage delivered to a device.
A pair of PWM channels are required for defining rotation speed and direction of the DC motors on each side.
In particular, **GPIO6** and **GPIO5** provide PWM to the left- and right- side DC motors to rotate in a **clockwise** direction.
Similarly, **GPIO4** and **GPIO7** provide PWM to the left- and right- side DC motors to rotate in a **counter-clockwise** direction.