An Arduino Nano Electronic Speed Controller (ESC) — Part 3

David Such
9 min readNov 19, 2022

In Part 1 we introduced our Arduino based ESC and followed this in Part 2 with an explanation of the power stage and MOSFET drivers. Part 3 focusses on the bootstrap capacitor which is part of the driver circuit used to turn the high-side MOSFET hard on.

Figure 1. IR2110 Dual MOSFET Driver Connections

7.0 The Bootstrap Capacitor

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David Such

Reefwing Software · Embedded Systems Engineer · iOS & AI Development · Robotics · Drones · Arduino · Raspberry Pi · Flight Control