If you do a lot with servos this could be a handy tool to have on your shelf.

If so, the next step might be to simplify it and put it in a case of some sort. The prototype in this guide was built using Feather ecosystem components for ease of construction using the tripler wing. Since using 5v for the servo was a requirement, being battery powered wasn't. That makes it easy to switch to an ItsyBitsy M0 Express (it has no onboard battery support). The OLED display comes in a breakout version that's identical functionally to the FeatherWing for our purpose (it is just the display, no buttons). The level shifter and rotary encoder don't change.

Adafruit ItsyBitsy M0 Express - for CircuitPython & Arduino IDE

PRODUCT ID: 3727
What's smaller than a Feather but larger than a Trinket? It's an Adafruit ItsyBitsy M0 Express! Small, powerful, with a rockin' ATSAMD21 Cortex M0...
$11.95
IN STOCK

Monochrome 128x32 I2C OLED graphic display

PRODUCT ID: 931
These displays are small, only about 1" diagonal, but very readable due to the high contrast of an OLED display. This display is made of 128x32 individual white OLED pixels, each...
OUT OF STOCK

The author anticipates doing this when he gets time to spend in Fusion360, so watch for an update if you are interested.

This guide was first published on Nov 16, 2018. It was last updated on Nov 16, 2018.
This page (Next Steps) was last updated on Sep 27, 2020.