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manual
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@@ -1,4 +1,4 @@
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# Sphinx build info version 1
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# This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
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config: 4cc9ee0f9f77e14cf8c7713a4bf8af68
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config: 810e69613b4eb0d1d8e31e14492e94f3
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tags: 62a1e7829a13fc7881b6498c52484ec0
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@@ -333,9 +333,9 @@ Based on this constraint, the RC car can only move front, back, and turn/rotate
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<strong>
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PWM
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</strong>
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(Pulse Width Modulation) is a technique used to simulate analog voltage levels using ddiscrete igital signals. It works by rapidly switching a
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digital pin between HIGH (on) and LOW (off) states at a fixed frequency (often, at base frequency of 5 kHz). The duty cycle—the percentage of time the signal is HIGH in one
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cycle determines the effective voltage delivered to a device.
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stands for Pulse Width Modulation. It is a technique used to simulate analog voltage levels using discrete digital signals. It works by
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rapidly switching a digital GPIO pin between HIGH (on) and LOW (off) states at a fixed frequency (often, at base frequency of 5 kHz).
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The duty cycle—the percentage of time the signal is HIGH in one cycle determines the effective voltage delivered to a device.
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</p>
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<p>
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A higher duty cycle increases the motor speed, and a lower duty cycle decreases the motor speed. This allows for fine-grained speed control
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@@ -343,7 +343,7 @@ without needing analog voltage regulators.
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</p>
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</div>
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<p>
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A pair of PWM channels are required for defining rotation speed and direction of the DC motors on each side.
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A pair of PWM channels are used per DC motor for defining their rotation speed and direction on each side.
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In particular,
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<strong>
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GPIO6
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@@ -372,6 +372,47 @@ Similarly,
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direction.
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Changing PWM on each channel determines the speed and direction of the RC car.
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</p>
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<table class="docutils align-default">
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<thead>
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<tr class="row-odd">
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<th class="head">
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<p>
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GPIO Num.
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</p>
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</th>
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<th class="head">
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<p>
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State
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</p>
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</th>
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<th class="head">
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<p>
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Function
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</p>
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</th>
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</tr>
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</thead>
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<tbody>
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<tr class="row-even">
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<td>
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<p>
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GPIO6
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GPIO4
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</p>
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</td>
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<td>
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<p>
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PWM
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</p>
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</td>
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<td>
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<p>
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Forward
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</p>
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</td>
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</tr>
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</tbody>
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</table>
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<p>
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The following images illustrate various PWM duty cycles registered by oscilloscope (duty cycles 0%, 48% and 91%, resp.).
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</p>
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