![]() The solenoid circuit is much less intimidating. Darlington Transistor or TIP120 transistor - x16.Next We'll move on to the solenoid circuit. All About Circuits is a wonderful resource for this. Likewise, if you are new to reading schematics, now would be a great time to do some reading on symbols and polarity. If you are new to soldering I strongly suggest that you check out Adafruit's guide to soldering and practice on some perfboard before continuing with this project. ![]() Since we're working with a 12 volt power supply, 12 volt solenoids, and 12 volts is within the acceptable range to power an Arduino we can use the same power supply for everything. There are several layouts that will work for this step so if you play around with placement you may find a way that works better for you.Įverything will share a common ground in this project which will be important in the next step. It is easy to run out of room fairly quickly so please use the provided picture of the finished controller as a guide. If you follow the provided schematic you shouldn't have any issues.Ĭomponent placement will be critical. The MIDI circuit can appear intimidating to beginners, but is actually pretty straight forward. The first step is to assemble the MIDI controller. Desoldering Tool (if your new to soldering).Measuring Tool (I used a straight edge.).(3/4 inch spade bit and bits for pilot holes) Tools list (Note: This project requires wood fabrication and extra woodworking tools are advised.) USB to MIDI interface cord (if controlling from PC).(Solenoids can take quite a bit of power, I recommend a 10A supply) C4811 Darlington Transistor or TIP120 transistor - x16.(Note: Different variances in the xylophone that you purchase may result in needing extra and/or different parts) Parts and materials can be found at the vendor of your choice, but If you're new to the world of electronics it's suggested that you use Adafruit to buy your parts. An understanding of the Arduino platform.While this is only a guide, the Arduino code and electrical schematics will be provided.īefore trying to tackle this project you should have: One of the best applications for this is to build an automated xylophone. In this instructable we will explore how fire solenoids using an Arduino Uno and MIDI signals.
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