PreenFM open source FM sound module


According to its developer, French software engineer Xavier Hosxe, “PreenFM is a set of electronic components and C++ files that, when put together become a Frequency Modulation sound module.” It’s designed around a Leaflabs Maple Mini (available from Seeedstudio) and a collection of supporting components including EEPROMs, optocouplers, shift registers and op amps complemented by an LCD display and a slew of buttons, switches and discrete components.

You can find links to the schematic, code and supporting docs at the preenFM documentation page.

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