The Smart-Fx has a processor, Micro SD card reader, MP3 player, and amplifier along with power supply, circuit protection and external connectors. After considering the design, we built a prototype:
You may recognise this as being based on a Arduino. The prototype allowed us to develop the firmware, and prove all of the operation of Smart-Fx before committing the design to PCB. Once that was done, we end up with:
This is the first ever Smart-Fx. Built by hand. No changes had to be made to the firmware between the prototype and this production version. After 2 hours work, the unit was fully functional with only one patch wire needed.
Rapid prototyping utilising off-the-shelf components where possible, followed by a robust PCB layout process and our excellent low-volume build service meant that this project was completed in record time.