This repository contains some documentation and data created during the build process of a MIDIBox SEQ V4. Please note that I'm not the original author of the project. The original project is hosted at http://ucapps.de
I ordered the PCBs from http://midiboxshop.bigcartel.com
Here is the list:
I ordered the parts from TME, Reichelt, DigiKey and Mouser. Sourcing the parts is a little painful. In addition, for some parts there are a few (or many) options. The following are a few notes on the parts I've chosen for the build:
- ALPS Reichelt TODO
As I wanted to have nice backpanel as well as Ethernet support, I designed a PCB with the following additional features:
- Ethernet via SPI (based on http://ucapps.de/mbhp_eth.html)
- SD card socket
- USB connector
- +/- 12V DC/DC converter for the AOUT power supply
The PCB was designed in KiCad and produced by OSH Park. The PCB is available here. Feel free to order your own!
Here is the bill of materials:
| Part | Description | Supplier |
|---|---|---|
| C1, C4, C5, C6, C8, C9, C10, C11, C14, C15 | Ceramic Capacitor 100 nF | |
| C2, C3 | Ceramic Capacitor 18 pF | |
| C7 | Tantal Capacitor 10 uF | |
| C12, C16 | Polarized Capacitor 47 uF | |
| C13 | Polarized Capacitor 100 uF | |
| R1 | Resistor 2.32 kOhm | |
| R2, R3, R4, R5 | Resistor 49.9 Ohm | |
| R6, R7 | Resistor 220 Ohm | |
| L1 | Ferrit Bead 10 uH | Reichelt |
| Y1 | Crystal 25 MHz | Reichelt |
| IC1 | ENC28J60-I/SP DIP | DigiKey |
| P1 | USB B connector | TODO |
| U1 | 3M SD-RSMT-2-MQ | Mouser |
| U2 | NMH0512SC (datasheet) | Reichelt |
| U3 | Pulse J0026D21E | Mouser |
The frontpanel is based on the Wilba frontpanel. I only adjusted some of the drillings in addition to moving things around slightly to make sure everything fits within the case. The backpanel was designed from scratch in order to fit nicely with the MIDI I/O PCBs as well as my own PCB. In addition, a DSUB-25 connector is used for the analog bus and a few important analog outputs are available seperatly on 3.5 mm jacks. The rest of the case are just basic aluminium panels and everything is hold together by enclosure profiles. The case can be ordered from Schaeffer AG. All required files are available in the case directory.
