Your PWM driver is lying to you
Why a PCA9685 running "50 Hz" is really running 52, and what that does to a servo.
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Graceful shutdown in Go is mostly about the order
Draining an HTTP server is the easy half. The queue behind it is the half that loses data.
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Reading a schematic when you are not an electrical engineer
A working method for software people who have to bring up someone else's board.