09/11/2017 at 20:59 •
I've designed and printed the arm, which is most complicated piece. If fits snaps into the raised arm nicely, rotates well, and fits the needle.
The clasp that holds in the needle is a little brittle and might not stand up to swapping out the needle. Something to consider updating in future revs.
09/11/2017 at 20:53 •
The sounds off the turntable needle directly contains a lot of scratchy, high-frequency noise. The output is also too strong for the LM386 amplifier directly. After some tinkering with low-pass filters, I found some appropriate values get a good sound. I brought out the bass a little more than the original record player, and at this point I find the sound more pleasing than original amplifier.
I will publish the circuit schematic along with the PCB.