This module is built around a 32-bit MCU, a 2Kbit EEPROM, and a CH340 USB bus conversion chip. It is compatible with the latest Windows and Linux-based PCs. The module is user-friendly and provides capabilities similar to the older UM series musical chips. Its main objective is to serve as a replacement for popular melody generator chips such as the UM66, UM3561, UM3481, and others.
This module is powered by the USB bus and provides an analog AF output. It is capable of driving a small 8Ω speaker. The module features a jumper to select between different playback modes. When the jumper is open, it plays a programmed melody on a continuous loop. When the jumper is closed, the melody plays only once. To play the melody again, the user must press the push button on the module.
To flash the module, use the RTTTL loader script available in the Simtelic GitHub repository. This Python script connects to the module and transfers the specified RTTTL data file into it. The programming process takes less than 20 seconds and automatically resets the module after the flashing operation is complete. With this script, users can upload RTTTL data into the module, which can be up to 256 characters long.