TPA3116D2 TPA3116 BT sanwu Remix

thingiverse

This thing is a remix from the original TPA3116D2 TPA3116 BT sanwu by vladimir4. The original version implied to desolder the speaker terminals from the PCB and did not have enough room to accommodate the modifications I wanted to implement. This version has an enlarged back, with enough space to accommodate two banana terminals and a 4700µf 35v electrolytic capacitor in between the power source and the PCB power terminal. Additionally I designed a holder for the capacitor and a bleeding resistor of 1KOhm. This holder is printed apart from the body. I recommend to glue it to the body only after running all the wires. In the front, I installed a 3 pin, 2 position, On-On Toggle Switch. One position connects turns on the power and the other cuts the power and discharges the capacitor trough the bleeding resistor. Also, I enlarged the PCB support holes to accommodate 4 female brass PCB spacers, which I glued to the body. The PCB is mounted on the spacers and hold with M2 nuts. I got all the parts from eBay, the images will help you identify each one. As already mentioned by vladimir4 in the original part comments, this is a quite stable piece of hardware, I'm very happy with the final result. You can also find the Fusion 360 file that I created to modify the original STL files. This way you can adapt to your needs. WARNING: the 1KOhm resistor works for 12V, later I changed the power supply to 24V, therefore increased the bleeding resistor value to 3.3KOhm. I included a circuit simulation that you can open in https://www.falstad.com/circuit/ and check which values to use with different voltages (ignore the 1 Ohm and the load resistor) . Also, I have a very basic knowledge of electronics, my configuration is working fine, but use it at your own risk. Happy printing!