This is amazing, I am so happy it works. It was my first 4-layer PCB I designed from scratch on #KiCad! #GEM #S2 #turbokit #replica

Big win! I installed the #Turbokit on the #GEM #S2 and after some fiddling IT WORKS! I waited this moment since 1996 🥰 The #PCB was correct and the components were perfect, but it took a while to fix all the bad solder joints. Gosh, those 0402x8 resistor networks are SMALL and it took a while to learn to solder them properly (hot air and flux are your friends). Now, I only have to install the NiMh battery in a safe way. #electronics #sinthdiy #diy #music #Generalmusic #S3

The #Turbokit replica for the #GEM #S2 is complete. I will check it again and then install it on my synthesiser. I hope it will work! It is a little heavy because of the EPROMs, so if the board works I will 3D print a support bracket. #electronics #synth

I started assembling the #Turbokit replica for my #GEM S2. I had some troubles soldering the tiny 8-resistor networks but I managed to do it in a reasonable amount of time. I just ordered a 4-resistor network in the wrong package and some connectors and the EPROMs are still missing. A nice board, I like it, I hope it will work 😅

I received a few days ago the 4-layer board I designed for the #Generalmusic #S2 #Turbokit replica. It looks very nice, let’s hope it works 🙂 I will assemble it in the next few weeks, then I will try to install it on my keyboard.

In the meanwhile, I sent the order both for the components that remain to be sourced and the PCB. Now, I just have to wait. #Turbokit #Generalmusic

I corrected some errors and I think I reached what I think it will be the v1.0 design of the #PCB. I hope it will work! #Generalmusic #Turbokit #electronics #DIY #Synth

@brouhaha The S2 already uses a WD37C65. The #Turbokit upgrade specifically requires to swap it with a uPD72064. I think the newer software in EPROM (to be installed in the external board) explicitly requires some of its advanced features. I tried to source one, I will check it when I will try to install the upgrade. Let's hope it is not a fake!

I'm not very experienced with the routing of a 4-layer PCB but it is fun. The different copper layers are starting to look nice! #Turbokit #Generalmusic #Electronics #Diy

I created a GitHub project for the #Turbokit replica for the #Generalmusic #S2. It is not a project for the faint of heart, however, at it will require to modify the original boards of the #synth. It is still pretty much an ongoing project: https://github.com/DarwinNE/GEM_turbokit #openhardware #electronics #diy