Oops! All Servos! is Available
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My Oops! All Servos! expansion boards are now available for purchase in my Lectronz store alongside my Spy! Break! Inject!, VanSpoof and Touchy Subject projects!
As described in a previous post, the Oops! All Servos! is a XIAO / QT Py compatible expansion with JR-style servo headers and bidirectional 3.3 v to 5 v level shifters on all 11 GPIO pins, the development of which has been sponsored by JLCPCB💵.
When you're building mechatronics, such as robot arms or 3D printers, it's easy to get to a point where "just one more" servo or sensor would help you complete your project. With 11 GPIOs, all with JR-style servo connectors, running out of pins should be a thing of the past!
Level shifters on every GPIO pin mean you can interact with 5 v level devices such as servo-motors and NeoPixels safely and with performance. Making these level shifters bidirectional allows for two-way communication with other 5 v microcontrollers and TTL UARTs. Want to add extra sensors to your mechatronics project? Use a QT Py with your Oops! All Servos! and you can hook up a Qwiic/STEMMA QT chain of compatible I2C devices.
If you do fully load your project with servos, it's pretty likely you'll quickly hit the current limits from your microcontroller's supply and regulator. External power supply pads let you push as many amps as you need through your designs. A current measurement header lets you slip an ammeter in line to keep an eye on your power consumption.
This is a certified Open Source Hardware project and, while it is at the limit of hand-soldering, it is sized to fit on the sub-£100 hot plates commonly available on the market.
2026-08-25