A waveblaster breakout card to enable the use of external midi modules on sound cards:
Tested and working; here's the BOM:
| Id | Designator | Package | Quantity | Designation | Mouser: |
|---|---|---|---|---|---|
| 1 | J7 | IDC-Header_2x13_P2.54mm_Horizontal-reversed | 1 | Wavetable Input | 5103310-6 |
| 2 | J1 | Jack_3.5mm_CUI_SJ1-3533NG_Horizontal | 1 | Midi Out | 490-SJ1-3533NG |
| 3 | R4,R3 | 220R THT resistor | 2 | 220R | |
| 4 | J3 | CUI_RCJ-042 | 1 | Right In | 490-RCJ-042 |
| 5 | J4 | CUI_RCJ-043 | 1 | Left In | 490-RCJ-043 |
For the header, you also can just use 2.54mm pitch double row right angle header pins. For the resistors, just buy a through-hole resistor sample book on Amazon or something.
If you want to add on the midi in port (most sound cards do not have this connected), add:
- 1x H11L1M optocoupler : https://www.mouser.com/ProductDetail/onsemi-Fairchild/H11L1M
- 1x 220 Ohm THT Resistor
- 1x 280 Ohm THT Resistor
- 1x 1N4148 THT Diode: https://www.mouser.com/ProductDetail/onsemi-Fairchild/1N4148
It's not advised to add on the audio output ports (for audio input into the synth), as only ONE sound card is known to make use of these: the MediaTriX AudioTriX 3D-XG, and it is very rare.
For the MIDI ports, you want a Type "A" 3.5mm to DIN adapter, like this one: https://www.amazon.com/ZAWDIO-Breakout-LittleBits-Female-Electribe/dp/B08WHSP7ZL/ Make sure that it is not Type "B", as this type will not work.
For the ribbon cable to connect the waveblaster header, Just use a 26 pin IDC cable. This one worked well for me: https://www.amazon.com/gp/product/B01AG9GXV4/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
For the bracket, use the stencil file in bracket to 3D print it out. If you decide to make a metal one, be sure to add insulating rubber rings between the ports and the bracket, as this board is not intended to be grounded to the case.