Testing SoftwareSerial library in the Trinket to drive the  7-Segment Serial Display COM-11441 (Sparkfun)
The potentiometer value was maped in the range 900 to 2100 microseconds to generate the servo control pulses.

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The Serial Display  shows the pulse duration in milliseconds.

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Using bit banging instead of SoftwareSerial saves more than 2K of program memory.

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The YouTube video:

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