# LEGO-Compatible Servo Mounts
## Overview
https://youtu.be/HfG3FR6k9jE
Who doesn't love LEGO-compatible bricks? Nobody! Except when we accidentally step on them. There are soooo many mechanical things one can make with those ubiquitous bricks, plates, gears, and pulleys.
But what do you do when you want to add LEGO-compatible bricks and parts to your robotics project? Instead of hot glue, epoxy and hope, you can use a nicely designed resin-printed mounting shape.
**Horizontal and Vertical Micro Servo Mounts for LEGO-Compatible Brick Systems ** fit Adafruit '9g' [Micro Servos](https://www.adafruit.com/search?q=micro+servo) and [Micro-Servo-sized DC motors](https://www.adafruit.com/product/2941) securely with lots of dots on the bottom so you can mechanize **your** build easily.
Just place your micro servo, secure it with a screw (included with the servo), and it's ready to adapt to the standard LEGO-compatible parts. The servo and servo driving hardware is not included, this is just the plastic piece!
## Example
A PropMaker Feather powers the continuous servo making it really easy to plug and play with the built in header, just plug the servo right in!
The Terminal connector makes it easy to attach a NeoPixel strip to add lights to any scene.
A mini slide switch allows us to easily power our builds on and off so we designed a little holder that also has LEGO compatible studs.
## Parts
### Vertical Micro Servo Mount for LEGO-Compatible Brick Systems
[Vertical Micro Servo Mount for LEGO-Compatible Brick Systems](https://www.adafruit.com/product/6044)
Who doesn't love LEGO-compatible bricks? Nobody! Except when we accidentally step on them. There are soooo many mechanical things one can make with those ubiquitous bricks, plates, gears, and pulleys. Say a [13-meter high LEGO...](https://www.youtube.com/watch?v=kV2LXHvZHZo)
Out of Stock
[Buy Now](https://www.adafruit.com/product/6044)
[Related Guides to the Product](https://learn.adafruit.com/products/6044/guides)
### Horizontal Micro Servo Mount for LEGO-Compatible Brick Systems
[Horizontal Micro Servo Mount for LEGO-Compatible Brick Systems](https://www.adafruit.com/product/6043)
Who doesn't love LEGO-compatible bricks? Nobody! Except when we accidentally step on them. There are soooo many mechanical things one can make with those ubiquitous bricks, plates, gears, and pulleys. Say a [13-meter high LEGO...](https://www.youtube.com/watch?v=kV2LXHvZHZo)
In Stock
[Buy Now](https://www.adafruit.com/product/6043)
[Related Guides to the Product](https://learn.adafruit.com/products/6043/guides)
### Continuous Rotation Micro Servo
[Continuous Rotation Micro Servo](https://www.adafruit.com/product/2442)
Need to make a _tiny_ robot? This little micro servo rotates 360 degrees fully forward or backward, instead of moving to a single position. You can use any servo code, hardware, or library to control these servos. Good for making simple moving robots. Comes with five horns and...
In Stock
[Buy Now](https://www.adafruit.com/product/2442)
[Related Guides to the Product](https://learn.adafruit.com/products/2442/guides)
### Micro servo
[Micro servo](https://www.adafruit.com/product/169)
Tiny little servo can rotate approximately 180 degrees (90 in each direction) and works just like the standard kinds you're used to but _smaller_. You can use any servo code, hardware, or library to control these servos. Good for beginners who want to make stuff move without...
Out of Stock
[Buy Now](https://www.adafruit.com/product/169)
[Related Guides to the Product](https://learn.adafruit.com/products/169/guides)
### DC Motor in Micro Servo Body
[DC Motor in Micro Servo Body](https://www.adafruit.com/product/2941)
This tiny **DC Motor in Micro Servo Body** is an interesting motor - it's the same size and shape as our micro servo but it _isn't_ a servo. It's more like a DC motor + plastic gear-train in a box. It's not a super powerful motor, it would do well as a...
In Stock
[Buy Now](https://www.adafruit.com/product/2941)
[Related Guides to the Product](https://learn.adafruit.com/products/2941/guides)
### Premium Male/Male Jumper Wires - 20 x 3" (75mm)
[Premium Male/Male Jumper Wires - 20 x 3" (75mm)](https://www.adafruit.com/product/1956)
Handy for making wire harnesses or jumpering between headers on PCB's. These premium jumper wires are 3" (75mm) long and come in a 'strip' of 20 (2 pieces of each of ten rainbow colors). They have 0.1" male header contacts on either end and fit cleanly next to each...
Out of Stock
[Buy Now](https://www.adafruit.com/product/1956)
[Related Guides to the Product](https://learn.adafruit.com/products/1956/guides)
### 2 x AA Battery Holder with On/Off Switch & JST PH Connector
[2 x AA Battery Holder with On/Off Switch & JST PH Connector](https://www.adafruit.com/product/4193)
This battery holder connects 2 AA batteries together in series for powering all kinds of projects. We spec'd these out because the box is fairly slim, and 2 AA's add up to about 3V for many low voltage electronics projects, plus it has a nifty on-off switch.
In Stock
[Buy Now](https://www.adafruit.com/product/4193)
[Related Guides to the Product](https://learn.adafruit.com/products/4193/guides)
### Ultra Skinny NeoPixel 1515 LED Strip 4mm wide
[Ultra Skinny NeoPixel 1515 LED Strip 4mm wide](https://www.adafruit.com/product/4368)
We have all sorts of LED strips for a wide range of needs. [_Chonky_](https://www.adafruit.com/product/3869) strips? We got those! [Strips with alligator clips](https://www.adafruit.com/?q=neopixel%20alligator%20clips%20stripping%20wires) that are easy-peasy...
In Stock
[Buy Now](https://www.adafruit.com/product/4368)
[Related Guides to the Product](https://learn.adafruit.com/products/4368/guides)
### Speaker - 40mm Diameter - 4 Ohm 5 Watt
[Speaker - 40mm Diameter - 4 Ohm 5 Watt](https://www.adafruit.com/product/3968)
Hear the good news! This speaker is a great addition to any audio project where you need a 4 Ohm impedance and 3W or less of power.
At **40mm diameter** it has a more square-ish shape, but a smaller face. Sound quality and volume are nicely sandwiched between our...
In Stock
[Buy Now](https://www.adafruit.com/product/3968)
[Related Guides to the Product](https://learn.adafruit.com/products/3968/guides)
### Slide Switch Mount for LEGO-Compatible Brick Systems
[Slide Switch Mount for LEGO-Compatible Brick Systems](https://www.adafruit.com/product/6053)
What do you do when you want to add LEGO-compatible bricks and parts to your robotics project? Instead of hot glue and epoxy and hope, you can use a nicely designed and resin-printed mounting shape. This **Slide Switch Mount for LEGO-Compatible Brick Systems** will fit our
In Stock
[Buy Now](https://www.adafruit.com/product/6053)
[Related Guides to the Product](https://learn.adafruit.com/products/6053/guides)
### Part: M2.5x6mm Screws
quantity: 2
M2.5x6mm Screws
[M2.5x6mm Screws](https://amzn.to/3ZvDMvg)
### Part: M2x6mm Screws
quantity: 2
M2x6mm Screws
[M2x6mm Screws](https://amzn.to/47AsYhn)
# LEGO-Compatible Servo Mounts
## 3D Printing Your Own
You can buy the servo mounts from Adafruit, [horizontal](https://www.adafruit.com/product/6043) and [vertical](https://www.adafruit.com/product/6044).
Other parts will be added to the Adafruit store in the future.
If you are keen to print your own with a 3D printer, the files are available from the links below.
## 3D Printed Parts
STL files for 3D printing will need to be oriented for print using either FDM or SLS machines. Parts were tested using PLA filament. Use [super glue](https://amzn.to/47FitcE "Starbond 4 oz. Medium CA Glue") to adhere the top and bottom halves together.
Original design source files may be downloaded using the links below
[Propmaker Lego STL](https://cdn-learn.adafruit.com/assets/assets/000/132/551/original/propmaker-lego.zip?1727189837)
[Servo Lego Horizontal STL](https://cdn-learn.adafruit.com/assets/assets/000/132/552/original/servo-lego-horiz.zip?1727189881)
[Servo Lego Vertical STL](https://cdn-learn.adafruit.com/assets/assets/000/132/553/original/servo-lego-vert.zip?1727189901)
[Lego Slide Switch STL](https://cdn-learn.adafruit.com/assets/assets/000/132/554/original/lego-slide-switch.zip?1727189984)
## Slice with Settings for PLA material
The parts were sliced using CURA using the slice settings below.
- PLA filament 200c extruder
- 0.25 layer height
- 20% gyroid infill
- 60mm/s print speed
- 60°C heated bed
# LEGO-Compatible Servo Mounts
## Assembly
## Servos
Just use the mounting screws included with the servo to secure the micro servo to either of the 3D printed mounts.
## Feather
The Feather LEGO-compatible mount features a low-profile plate for fitting into tight spaces and allowing wire to run underneath. It's got a series of tubes on the bottom and four built-in stand-offs for securing the board with machine screws.
Use M2.5x6mm screws for the screws near the USB port.
The screws holes near the terminal block require M2x6mm screws.
## Slide Switch
A mini slide switch allows one to easily turn the power for builds on and off. To facilitate their use, we designed a little holder that also has LEGO compatible studs.
Move the slide switch toggle to the middle and insert the body at an angle to press fit into place.
## DC Servo
Use two Plug to Plug jumper wires to connect the JST port on a battery pack to a DC servo so no microcontroller is required at all!
# LEGO-Compatible Servo Mounts
## Circuit Diagram
The diagram below provides a general visual reference for wiring of the components once you get to the **Assembly** page. This diagram was created using the software package [Fritzing](http://fritzing.org/download/).
## Adafruit Library for Fritzing
Adafruit uses the Adafruit's Fritzing parts library to create circuit diagrams for projects. You can download the library or just grab individual parts. Get the library and parts from [GitHub - Adafruit Fritzing Parts](https://github.com/adafruit/Fritzing-Library/tree/master/parts).
## Wired Connections
- The speaker is connected to the pins on the screw block terminal
- The NeoPixel Strip is connected to the pins on the screw block terminal
- The servo plugs into the servo connection pins
- The slide switch is connected to the EN and GND pins on the Feather
- The USB battery plugs into the USB C port on the Feather
## [DC Motor in Micro Servo Body](https://www.adafruit.com/product/2941)
Skip the micro controller and use a AAA or AA battery pack with an on and off switch.
Use two [Plug to Plug jumper wires](https://www.adafruit.com/product/1956 "Premium Male/Male Jumper Wires - 20 x 3") to connect the JST port on a battery pack to the DC servo, so no microcontroller is required at all!
# LEGO-Compatible Servo Mounts
## CircuitPython
[CircuitPython](https://github.com/adafruit/circuitpython) is a derivative of [MicroPython](https://micropython.org) designed to simplify experimentation and education on low-cost microcontrollers. It makes it easier than ever to get prototyping by requiring no upfront desktop software downloads. Simply copy and edit files on the **CIRCUITPY** drive to iterate.
## CircuitPython Quickstart
Follow this step-by-step to quickly get CircuitPython running on your board.
[Download the latest version of CircuitPython for this board via circuitpython.org](https://circuitpython.org/board/adafruit_feather_rp2040_prop_maker/)
**Click the link above to download the latest CircuitPython UF2 file.**
Save it wherever is convenient for you.
To enter the bootloader, hold down the **BOOT/**** BOOTSEL button**(highlighted in red above), and while continuing to hold it (don't let go!), press and release the**reset button**(highlighted in red or blue above). **Continue to hold the BOOT/BOOTSEL button until the RPI-RP2 drive appears!**
If the drive does not appear, release all the buttons, and then repeat the process above.
You can also start with your board unplugged from USB, press and hold the BOOTSEL button (highlighted in red above), continue to hold it while plugging it into USB, and wait for the drive to appear before releasing the button.
A lot of people end up using charge-only USB cables and it is very frustrating! **Make sure you have a USB cable you know is good for data sync.**
You will see a new disk drive appear called **RPI-RP2**.
Drag the **adafruit\_circuitpython\_etc.uf2** file to **RPI-RP2.**
The **RPI-RP2** drive will disappear and a new disk drive called **CIRCUITPY** will appear.
That's it, you're done! :)
## Safe Mode
You want to edit your **code.py** or modify the files on your **CIRCUITPY** drive, but find that you can't. Perhaps your board has gotten into a state where **CIRCUITPY** is read-only. You may have turned off the **CIRCUITPY** drive altogether. Whatever the reason, safe mode can help.
Safe mode in CircuitPython does not run any user code on startup, and disables auto-reload. This means a few things. First, safe mode _bypasses any code in_ **boot.py** (where you can set **CIRCUITPY** read-only or turn it off completely). Second, _it does not run the code in_ **code.py**. And finally, _it does not automatically soft-reload when data is written to the_ **CIRCUITPY** _drive_.
Therefore, whatever you may have done to put your board in a non-interactive state, safe mode gives you the opportunity to correct it without losing all of the data on the **CIRCUITPY** drive.
### Entering Safe Mode
To enter safe mode when using CircuitPython, plug in your board or hit reset (highlighted in red above). Immediately after the board starts up or resets, it waits 1000ms. On some boards, the onboard status LED (highlighted in green above) will blink yellow during that time. If you press reset during that 1000ms, the board will start up in safe mode. It can be difficult to react to the yellow LED, so you may want to think of it simply as a slow double click of the reset button. (Remember, a fast double click of reset enters the bootloader.)
### In Safe Mode
If you successfully enter safe mode on CircuitPython, the LED will intermittently blink yellow three times.
If you connect to the serial console, you'll find the following message.
```terminal
Auto-reload is off.
Running in safe mode! Not running saved code.
CircuitPython is in safe mode because you pressed the reset button during boot. Press again to exit safe mode.
Press any key to enter the REPL. Use CTRL-D to reload.
```
You can now edit the contents of the **CIRCUITPY** drive. Remember, _your code will not run until you press the reset button, or unplug and plug in your board, to get out of safe mode._
## Flash Resetting UF2
If your board ever gets into a really _weird_ state and CIRCUITPY doesn't show up as a disk drive after installing CircuitPython, try loading this 'nuke' UF2 to RPI-RP2. which will do a 'deep clean' on your Flash Memory. **You will lose all the files on the board** , but at least you'll be able to revive it! After loading this UF2, follow the steps above to re-install CircuitPython.
[Download flash erasing "nuke" UF2](https://cdn-learn.adafruit.com/assets/assets/000/101/659/original/flash_nuke.uf2?1618945856)
# LEGO-Compatible Servo Mounts
## Prop-Maker Example
## Carousel Code
The Following example is used in the Carousel demo to continuously spin the servo with a NeoPixel rainbow fade while playing an audio loop.
https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/LEGO_Carousel_PropMaker/code.py
Your RP2040 Prop-Maker Feather **CIRCUITPY ** drive should look like this after copying the **lib** folder, the **code.py ** file and **wand-mix-sfx.wav** audio file
## Featured Products
### Horizontal Micro Servo Mount for LEGO-Compatible Brick Systems
[Horizontal Micro Servo Mount for LEGO-Compatible Brick Systems](https://www.adafruit.com/product/6043)
Who doesn't love LEGO-compatible bricks? Nobody! Except when we accidentally step on them. There are soooo many mechanical things one can make with those ubiquitous bricks, plates, gears, and pulleys. Say a [13-meter high LEGO...](https://www.youtube.com/watch?v=kV2LXHvZHZo)
In Stock
[Buy Now](https://www.adafruit.com/product/6043)
[Related Guides to the Product](https://learn.adafruit.com/products/6043/guides)
### Vertical Micro Servo Mount for LEGO-Compatible Brick Systems
[Vertical Micro Servo Mount for LEGO-Compatible Brick Systems](https://www.adafruit.com/product/6044)
Who doesn't love LEGO-compatible bricks? Nobody! Except when we accidentally step on them. There are soooo many mechanical things one can make with those ubiquitous bricks, plates, gears, and pulleys. Say a [13-meter high LEGO...](https://www.youtube.com/watch?v=kV2LXHvZHZo)
Out of Stock
[Buy Now](https://www.adafruit.com/product/6044)
[Related Guides to the Product](https://learn.adafruit.com/products/6044/guides)
### Continuous Rotation Micro Servo
[Continuous Rotation Micro Servo](https://www.adafruit.com/product/2442)
Need to make a _tiny_ robot? This little micro servo rotates 360 degrees fully forward or backward, instead of moving to a single position. You can use any servo code, hardware, or library to control these servos. Good for making simple moving robots. Comes with five horns and...
In Stock
[Buy Now](https://www.adafruit.com/product/2442)
[Related Guides to the Product](https://learn.adafruit.com/products/2442/guides)
### Micro servo
[Micro servo](https://www.adafruit.com/product/169)
Tiny little servo can rotate approximately 180 degrees (90 in each direction) and works just like the standard kinds you're used to but _smaller_. You can use any servo code, hardware, or library to control these servos. Good for beginners who want to make stuff move without...
Out of Stock
[Buy Now](https://www.adafruit.com/product/169)
[Related Guides to the Product](https://learn.adafruit.com/products/169/guides)
### DC Motor in Micro Servo Body
[DC Motor in Micro Servo Body](https://www.adafruit.com/product/2941)
This tiny **DC Motor in Micro Servo Body** is an interesting motor - it's the same size and shape as our micro servo but it _isn't_ a servo. It's more like a DC motor + plastic gear-train in a box. It's not a super powerful motor, it would do well as a...
In Stock
[Buy Now](https://www.adafruit.com/product/2941)
[Related Guides to the Product](https://learn.adafruit.com/products/2941/guides)
### Slide Switch Mount for LEGO-Compatible Brick Systems
[Slide Switch Mount for LEGO-Compatible Brick Systems](https://www.adafruit.com/product/6053)
What do you do when you want to add LEGO-compatible bricks and parts to your robotics project? Instead of hot glue and epoxy and hope, you can use a nicely designed and resin-printed mounting shape. This **Slide Switch Mount for LEGO-Compatible Brick Systems** will fit our
In Stock
[Buy Now](https://www.adafruit.com/product/6053)
[Related Guides to the Product](https://learn.adafruit.com/products/6053/guides)
## Related Guides
- [Using LoraWAN and The Things Network with Feather](https://learn.adafruit.com/the-things-network-for-feather.md)
- [Boomy Pi Airplay Boombox](https://learn.adafruit.com/boomy-pi-airplay.md)
- [NeoPixel Rotary Fidget](https://learn.adafruit.com/neopixel-rotary-fidget.md)
- [GoPro Hero 5 NinjaFlex Case with Tripod](https://learn.adafruit.com/gopro-hero-5-ninjaflex-case-with-tripod.md)
- [Remote Control Candy Dispenser Ghost](https://learn.adafruit.com/ble-claw.md)
- [Magnet Bottle Holder](https://learn.adafruit.com/magnet-bottle-holder.md)
- [Blinking an LED with the Zephyr RTOS](https://learn.adafruit.com/blinking-led-with-zephyr-rtos.md)
- [CircuitPython Painter](https://learn.adafruit.com/circuitpython-painter.md)
- [LED Drone Matrix](https://learn.adafruit.com/led-matrix-drone.md)
- [PermaProto Feather Case](https://learn.adafruit.com/permaproto-feather-case.md)
- [Making Adabot: Part 1](https://learn.adafruit.com/making-adabot-part-1.md)
- [MIT Green Building NeoPixel Tetris](https://learn.adafruit.com/tetris-building.md)
- [Forecast the Weather at Home with a No-Code Barometer ](https://learn.adafruit.com/dps310-analog-barometer.md)
- [Animated Scrolling "Mario Clouds" TFT Jewelry](https://learn.adafruit.com/scrolling-mario-clouds-tft-jewelry.md)
- [3D Printed Dragon Lamp](https://learn.adafruit.com/dragon-lamp.md)