# CircuitPython Servo Tester
## Overview
Servos are great fun, and incredibly useful when you want to make something move.
They do have some issues at times, though. Sometimes you need to set them to a specific angle for assembly. Turning the output shaft manually can be problematic since they're not made for that and on cheaper servos you can strip gears or break teeth pretty easily. If the servo already has broken teeth or such, it's motion can be erratic and it's best to know that before you put things together. Finally servos can vary a bit in what their pulse width bounds are. If you need a full range of motion from them you need to figure out and account for those bounds (Adafruit servo libraries allow you to set them when you construct a servo object).
All in all, it would be nice to have a way to fiddle around with a servo before building it into a project.
This project does just that. Hook up a servo and test it's range of motion (0-180 degrees), test the smoothness of its motion by having it sweep back and forth between 0 and 180 at different speeds, and try different boundary pulse widths to find the servo's limits.
### Adafruit Feather M0 Express
[Adafruit Feather M0 Express](https://www.adafruit.com/product/3403)
At the Feather M0's heart is an ATSAMD21G18 ARM Cortex M0+ processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new [Arduino Zero](https://www.adafruit.com/products/2843). This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and...
In Stock
[Buy Now](https://www.adafruit.com/product/3403)
[Related Guides to the Product](https://learn.adafruit.com/products/3403/guides)
### Adafruit FeatherWing OLED - 128x32 OLED Add-on For Feather
[Adafruit FeatherWing OLED - 128x32 OLED Add-on For Feather](https://www.adafruit.com/product/2900)
A Feather board without ambition is a Feather board without FeatherWings! This is the **FeatherWing OLED** : it adds a 128x32 monochrome OLED plus 3 user buttons to _any_ Feather main board. Using our [Feather Stacking...](https://www.adafruit.com/products/2830)
In Stock
[Buy Now](https://www.adafruit.com/product/2900)
[Related Guides to the Product](https://learn.adafruit.com/products/2900/guides)
### FeatherWing Tripler Mini Kit - Prototyping Add-on For Feathers
[FeatherWing Tripler Mini Kit - Prototyping Add-on For Feathers](https://www.adafruit.com/product/3417)
This is the **FeatherWing Tripler** - a prototyping add-on and more for all Feather boards. This is similar to our [FeatherWing Proto](https://www.adafruit.com/products/2884) except there are three! The magic of the Tripler comes when you want to connect your Feather to...
In Stock
[Buy Now](https://www.adafruit.com/product/3417)
[Related Guides to the Product](https://learn.adafruit.com/products/3417/guides)
### FeatherWing Proto - Prototyping Add-on For All Feather Boards
[FeatherWing Proto - Prototyping Add-on For All Feather Boards](https://www.adafruit.com/product/2884)
A Feather board without ambition is a Feather board without FeatherWings!
This is the **FeatherWing Proto** - a prototyping add-on for all Feather boards. Using our [Feather Stacking Headers](https://www.adafruit.com/products/2830) or
In Stock
[Buy Now](https://www.adafruit.com/product/2884)
[Related Guides to the Product](https://learn.adafruit.com/products/2884/guides)
### Rotary Encoder + Extras
[Rotary Encoder + Extras](https://www.adafruit.com/product/377)
This rotary encoder is the best of the best, it's a high-quality 24-pulse encoder, with detents and a nice feel. It is panel mountable for placement in a box, or you can plug it into a breadboard (just cut/bend the two mechanical side tabs.) We also include a nice soft-touch knob with an...
Out of Stock
[Buy Now](https://www.adafruit.com/product/377)
[Related Guides to the Product](https://learn.adafruit.com/products/377/guides)
### 4-channel I2C-safe Bi-directional Logic Level Converter
[4-channel I2C-safe Bi-directional Logic Level Converter](https://www.adafruit.com/product/757)
Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flashcards, and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V. Here we've got a ** 4-channel I2C-safe...**
Out of Stock
[Buy Now](https://www.adafruit.com/product/757)
[Related Guides to the Product](https://learn.adafruit.com/products/757/guides)
## Other Tools and Supplies
- Soldering iron and solder
- hookup wire, the [30AWG Silicone Covered Stranded-Core Wire](https://www.adafruit.com/product/3164) works great
- 3 pins of male header, either [straight](https://www.adafruit.com/product/2671) or [right-angle](https://www.adafruit.com/product/1540).
- [Next Page](https://learn.adafruit.com/circuitpython-servo-tester/circuitry.md)
## Featured Products
### Adafruit Feather M0 Express
[Adafruit Feather M0 Express](https://www.adafruit.com/product/3403)
At the Feather M0's heart is an ATSAMD21G18 ARM Cortex M0+ processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new [Arduino Zero](https://www.adafruit.com/products/2843). This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and...
In Stock
[Buy Now](https://www.adafruit.com/product/3403)
[Related Guides to the Product](https://learn.adafruit.com/products/3403/guides)
### Adafruit FeatherWing OLED - 128x32 OLED Add-on For Feather
[Adafruit FeatherWing OLED - 128x32 OLED Add-on For Feather](https://www.adafruit.com/product/2900)
A Feather board without ambition is a Feather board without FeatherWings! This is the **FeatherWing OLED** : it adds a 128x32 monochrome OLED plus 3 user buttons to _any_ Feather main board. Using our [Feather Stacking...](https://www.adafruit.com/products/2830)
In Stock
[Buy Now](https://www.adafruit.com/product/2900)
[Related Guides to the Product](https://learn.adafruit.com/products/2900/guides)
### FeatherWing Tripler Mini Kit - Prototyping Add-on For Feathers
[FeatherWing Tripler Mini Kit - Prototyping Add-on For Feathers](https://www.adafruit.com/product/3417)
This is the **FeatherWing Tripler** - a prototyping add-on and more for all Feather boards. This is similar to our [FeatherWing Proto](https://www.adafruit.com/products/2884) except there are three! The magic of the Tripler comes when you want to connect your Feather to...
In Stock
[Buy Now](https://www.adafruit.com/product/3417)
[Related Guides to the Product](https://learn.adafruit.com/products/3417/guides)
### FeatherWing Proto - Prototyping Add-on For All Feather Boards
[FeatherWing Proto - Prototyping Add-on For All Feather Boards](https://www.adafruit.com/product/2884)
A Feather board without ambition is a Feather board without FeatherWings!
This is the **FeatherWing Proto** - a prototyping add-on for all Feather boards. Using our [Feather Stacking Headers](https://www.adafruit.com/products/2830) or
In Stock
[Buy Now](https://www.adafruit.com/product/2884)
[Related Guides to the Product](https://learn.adafruit.com/products/2884/guides)
### Rotary Encoder + Extras
[Rotary Encoder + Extras](https://www.adafruit.com/product/377)
This rotary encoder is the best of the best, it's a high-quality 24-pulse encoder, with detents and a nice feel. It is panel mountable for placement in a box, or you can plug it into a breadboard (just cut/bend the two mechanical side tabs.) We also include a nice soft-touch knob with an...
Out of Stock
[Buy Now](https://www.adafruit.com/product/377)
[Related Guides to the Product](https://learn.adafruit.com/products/377/guides)
### 4-channel I2C-safe Bi-directional Logic Level Converter
[4-channel I2C-safe Bi-directional Logic Level Converter](https://www.adafruit.com/product/757)
Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flashcards, and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V. Here we've got a ** 4-channel I2C-safe...**
Out of Stock
[Buy Now](https://www.adafruit.com/product/757)
[Related Guides to the Product](https://learn.adafruit.com/products/757/guides)
### Silicone Cover Stranded-Core Wire - 50ft 30AWG Black
[Silicone Cover Stranded-Core Wire - 50ft 30AWG Black](https://www.adafruit.com/product/3164)
Silicone-sheathing wire is super-flexible and soft, and its also strong! Able to handle up to 200°C and up to 600V, it will do when PVC covered wire wimps out. We like this wire for being extremely supple and flexible, so it is great for wearables or projects where the wire-harness has to...
Out of Stock
[Buy Now](https://www.adafruit.com/product/3164)
[Related Guides to the Product](https://learn.adafruit.com/products/3164/guides)
### 2mm Pitch 40-Pin Break-apart Male Headers - Pack of 5
[2mm Pitch 40-Pin Break-apart Male Headers - Pack of 5](https://www.adafruit.com/product/2671)
Never get frustrated with 2mm-pitch modules again! Each one of these **40-pin break-apart header packs** contains 5 pieces of 40-pin, **2mm** pitch headers. Great for when you need to connect to something with 2mm pitch. Stack these headers side by side or...
In Stock
[Buy Now](https://www.adafruit.com/product/2671)
[Related Guides to the Product](https://learn.adafruit.com/products/2671/guides)
## Related Guides
- [Adafruit OLED FeatherWing](https://learn.adafruit.com/adafruit-oled-featherwing.md)
- [Adafruit Feather M0 Express](https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-circuitpython.md)
- [CircuitPython Hardware: SSD1306 OLED Display](https://learn.adafruit.com/micropython-hardware-ssd1306-oled-display.md)
- [CircuitPython displayio Setup for TFT FeatherWings](https://learn.adafruit.com/using-circuitpython-displayio-with-a-tft-featherwing.md)
- [Homefruit FeatherWing Tester](https://learn.adafruit.com/homefruit-featherwing-tester.md)
- [IoT Filament Sensor](https://learn.adafruit.com/iot-filament-sensor.md)
- [7 Segment Display Internet Clock](https://learn.adafruit.com/7-segment-display-internet-clock.md)
- [Schluff - The Sleep Monitor](https://learn.adafruit.com/schluff-the-oshw-sleep-monitor.md)
- [CircuitPython Basics: Digital Inputs & Outputs](https://learn.adafruit.com/circuitpython-digital-inputs-and-outputs.md)
- [Trellis Feather DSP-G1 Synthesizer](https://learn.adafruit.com/feather-trellis-dsp-g1-synthesizer.md)
- [Remote Effects Trigger Box](https://learn.adafruit.com/remote-effects-trigger.md)
- [Feather Waveform Generator in CircuitPython](https://learn.adafruit.com/waveform-generator.md)
- [MicroPython Displays: Drawing Shapes](https://learn.adafruit.com/micropython-displays-drawing-shapes.md)
- [CircuitPython 101: Basic Builtin Data Structures](https://learn.adafruit.com/basic-datastructures-in-circuitpython.md)
- [FeatherWing Proto, Doubler and Tripler](https://learn.adafruit.com/featherwing-proto-and-doubler.md)
- [CircuitPython I2C and SPI Under the Hood](https://learn.adafruit.com/circuitpython-basics-i2c-and-spi.md)