Michael GardiI added an Adafruit I2S 3W Class D Amplifier Breakout - MAX98357A module and an Adafruit MicroSD Card Breakout Board+ [ADA254] so that I could play sounds starting with the original Trekulator’s “calculating” sound. There were cheaper modules available but I like to reward Adafruit whenever I can for their hard work especially w.r.t. library creation and maintenance. The amplifier is I2S based and the card reader is SPI based so only 7 IO pins are required. I based the setup on an excellent DroneBot Workshop article Sound with ESP32 - I2S Protocol.
Of course this sets me up for producing many sounds for my Next Generation project.
Given how jarring the “computing” sound is, I’m not surprised that the speaker wires on my original unit and one of the Computer History Archives Project’s units were snipped. I think I’ll find a better alternative for my reproduction.
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