Fusion 360 source: speaker_mount v1.f3d.I printed this in PLA on a Ender 3 printer. I added holes and cutouts for the power jack, LCD display, time setting push buttons, and speaker.I designed a simple ring to mount the speaker to the inside top of the case.I used the Fusion 360 pattern tool to create the rectangular array of holes for the speaker.It would have been nicer to create a circular speaker grill pattern, but I couldn't find a simple way to do this.Someone had created a script for an older version of Fusion, but it doesn't install on the latest version.Have an idea on how to make a circular speaker pattern? Let us know with a comment. This project was a fine opportunity to improve my 3D CAD design skills.I use Fusion 360.The Fusion 360 Tutorial – Easy Snap Fit Cases! demonstrates a useful technique for designing parameter-driven (length, width, height, shell thickness) cases with snap together features for a no-screws/glue enclosure. I connected these to 2 pins that are enabled for interrupts and used attachInterrupt()Ĭode is in the "shoni_clock.ino" attachment.Resources for the Arduino code and connections: Two push buttons increase/decrease the time by one minute. mp3 file to the SD card and inserted it in the DFPlayer Mini.(Of course, this design allows you to use any sound for the alarm.) This worked fine for me.For an alarm sound, I liked this " Singing bowl struck with a felt-tipped mallet" recording on Freesound.With Audacity, I converted the recording to mono, trimmed it to a shorter length, added a fadeout, and saved it to a. The DFPlayer Mini MP3 Player documentation includes a connection diagram and sample code. It includes a CR2032 backup battery to keep time when the the overall project isn't powered.However, I learned that the DS3231 RTC is a better choice because it includes a temperature-compensated oscillator for more accurate time-keeping.Note that the DS3231M is not temperature compensated, so check carefully before purchasing. I first used the "Tiny RTC" DS1307 real-time clock. This is good platform for prototyping Arduino projects, along with many other similar platforms. I prototyped the design with a SparkFun Inventor's Kit which includes an Arduino Uno board, breadboard, jumper wires, etc.
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