2020-01-04 (Sa) MIDIGlocken

When I was testing these electromagnets, they got hot when I kept thirty-two volts applied for too long. I did my best to limit their dwell time, but I am far exceeding their expected voltage. I ran a torture test where I played pseudo-random notes at 160BPM for fifteen minutes. At the start of the trial, the coils were 23°C, and afterward, the hottest solenoid was 38°C.

After the test, which wasn't unpleasant for me, I tweaked the code to use Arduino's map() function instead of multiplication. This change let me dial in the high and low tempo without a lot of calculations. Another change let me alter the playing pace after setting it once, so now it can change on the fly.

I added a new mode that plays a group of prandom notes, then pauses for a single beat. This was the third single-player mode. The program uses the tempo set in the previous mode, and a group size based on button presses.
 Starting temperature

Temperature after fifteen minutes of prandom playing

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6

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