MIDIBox SID Project Blog

A COMMODORE 64 BASED MUSIC SYNTHESIZER

I Give You Power

Thursday, November 23, 2017

OK, hopefully this time I got the right parts for the power section. I’ve added the components and the various required wires jumping pins. Now it's time to test the power.

I cannibalized the power jack from the old modular MIDIBox (I’m stealing its power supply too). I EAT YOU FOR ECONOMIC SUFFICIENCY. I’ve also installed the power switch from one of the 64s.

Nothing popped or sparked. No smoking. All good signs. Time to follow the official guide’s testing for voltages.

Mistake-O-Rama

Sunday, November 19, 2017

Well today was a mistake-o-rama. Nothing major, just annoying for my own lack of attention. My Arrow order came, so I sat down thinking I had all the new parts only to realize that I ordered a polarized 330nF (0.33uF) cap for C2 in which it appears a non-polarized is required because C2 doesn’t indicate a positive pad. I’ve reached out to the forums and they said that I can use it still as long as I get it in the right direction (which would be the lower hole is positive).

Rising to the Surface

Sunday, November 12, 2017

Many people who have built a MIDIBox SID inside a Commodore 64 case have created a control surface panel that covers the whole front of the case that is attached with screws. While that's a much easier way to do things, I really wanted to use the actual keys from the PET style VIC-20 keyboard as the buttons for the synth and to still have exposed the keyboard cutout. After a bunch of research, measuring, hunting down the correct size switches and encoders, I figured out a solution that I think will work.

MIDIBox With a Side of Pi

Wednesday, November 8, 2017

I’ve decided (for now) that I will build the MIDIBox SID in the VIC-20 case. This means I have a C64C with everything but a power supply and a SID chip. I don’t know if the mainboard even works though so I think I’m going to go full nostalgia and use the 64C case and keyboard to make a Raspberry Pi based video game emulator.

BOM OMB

Sunday, November 5, 2017

I’ve come to discover I got myself mixed up with the instructions for building out the PSU sections and I think I need caps C1, C2, C4, C11, and C12. In addition I forgot to buy a 7812 voltage regulator which goes in V3.