TUBBUTEC Boss DR-110 MIDI Unipulse Demo Owner’s Manual
- June 13, 2024
- Tubbutec
Table of Contents
TUBBUTEC Boss DR-110 MIDI Unipulse Demo
Product Information
The Unipulse Installation kit is designed for use with the Boss DR-110 drum machine. It includes a modified Unipulse 606 pcb, a 3.5mm TRS jack (optional 5pin DIN jack), 2 slide switches, 4 M2 screws for the slide switches, and a 1N4148 diode.
Introduction
The Unipulse Installation kit allows for expanded functionality and
integration with MIDI. By installing the included slide switches, users can
select different modes of operation for the bass drum trigger and clock
selection.
Operation
To install the Unipulse kit, follow these steps:
- Case Cutouts: Drill a hole for the TRS jack and cut two rectangular openings for the switches. Place the switch in the cutout from the outside and mark the holes for the mounting screws. Drill 4 2mm holes.
- Trigger Points: Refer to the provided schematics for exact placement of components. Ensure that the Unipulse board does not interfere with switch 2. Use double-sided tape to attach the Unipulse board to the upper board of the DR-110.
- Power Connection and BD Trigger: Connect the 5V and 15V wires to the wire jumper shown. Solder a wire to the lifted leg of R68 and connect it to switch 2 pin 1. Solder a wire from P5 on the Unipulse board to the lifted leg of R68. The other end of this wire should be soldered to switch 2 pin 2.
- Switch 1 and MIDI Jack: Solder a wire from switch 1 pin 2 to R12. Connect the Start wire from Unipulse to switch 1 pin 3. Solder the MIDI 1 wire from Unipulse to the tip connection of the TRS jack. Solder the MIDI 2 wire from Unipulse to the ring connection of the TRS jack.
- Accent: Solder the CV wire from Unipulse to the anode of the provided diode. Connect the cathode side of the diode to R94.
- Clock: Solder the clock wire from Unipulse to R26. Cover switch 2 with a piece of insulating tape to prevent short circuits with the Unipulse board.
- GND and Voice Triggers: Connect the GND wire from Unipulse to the jumper between C6 and C7. Connect P3, P7, P8, and P9 on the Unipulse board to their respective points shown in the picture.
Note: For exact placement and reference, please consult the provided schematics and installation pictures.
The kit includes:
- modified Unipulse 606 pcb
- 3,5mm TRS jack and nut (optional 5pin DIN jack and mounting hardware)
- 2 slide switches
- 4 M2 screws for the slide switches
- 1N4148 diode
Introduction
Installation of Unipulse in a Boss DR-110 requires some serious case cutting work. Please be careful, although the plastic material is quite soft it is quite easy to break. All measurements given in this manual are in mm. Please check the positions before you start cutting, especially Switch 2 (BD kill switch) can easily interfere with the Unipulse board, so use common sense and check if there is enough space for the switch to fit. In case you don’t want a TRS jack but a standard 5pin DIN jack as MIDI jack please tell us when ordering. There is a picture how this can be accomplished, but no further details are given, so you have to figure this out yourself.
Operation
Two slide switches need to be installed. One for the clock selection, one for the bassdrum trigger selection. It is nessesary to install a slide switch to be able to switch the bassdrum between the internal trigger and the MIDI trigger.
- That leads to the following modes of operation:
- Standalone (internal sequencer, no MIDI)
- both slide switches to the left
- MIDI Sync (internal pattern synced to MIDI clock, no voice triggering via MIDI)
- left slide switch to the left, right slide switch to the right
- Voices triggered via MIDI
- left slide switch to the right, right slide switch to the left
- Voices triggered via MIDI on top of an internal pattern
- both slide switches to the right (BD will only be triggered via MIDI, not the internal sequencer)
MIDI is received on channel 10 with the following notes:
| Note | Name |
|---|---|
| 35 | Bass Drum |
| 38 | Snare |
| 39 | Clap |
| 40 | Electric Snare (extra sound) |
| 42 | Closed Hihat |
| 46 | Open Hihat |
| 49 | Cymbal |
| 51 | Extra Cymbal |
| 34 | Accent on/off |
Case cutouts
You need to drill one hole for the TRS jack and cut two rectangular openings for the switches. After you cut out the openings for the switches take the switch, place it in the cut out from the outside and mark the holes for the mounting screws. Drill 4 2mm holes.
Optional 5pin DIN jack. This is not easy and chances that you break the case are high. We strongly recommend the TRS jack.
Trigger points
Installation pictures
These are just for reference, please refer to the schematics above for exact placement. All designators are marked on the backside of the Unipulse board.
Board placement:
Make sure that Unipulse doesn’t interfere with switch 2. Double and triple
check placement of both. Use double-sided tape to glue Unipulse to the upper
board of the DR-110 as shown.
Power connection and BD trigger:
- Connect the 5V and 15V wires to the wire jumper shown. It’s easier to solder wires to the jumper than to the leg of the capacitor.
- Lift the leg of R68 pointing upwards in direction of the ribbon wire.
- Solder a wire to the place where the lifted leg of the resistor was located. This wire gets soldered to switch 2 pin 1.
- Solder a wire and P5 from the Unipulse board to the lifted leg of R68. The other end of the wire gets soldered to switch 2 pin 2.
Switch 1 and MIDI jack:
- Solder a wire from switch 1 pin 2 to R12. Solder the Start wire from Unipulse to switch 1 pin 3.
- Solder the MIDI 1 wire from Unipulse to the tip connection of the TRS jack.
- Solder the MIDI 2 wire from Unipulse to the ring connection of the TRS jack.
Accent:
Solder the CV wire from Unipulse to the anode of the provided diode. Solder
the cathode side of the diode to R94.
Clock:
Solder the clock wire from Unipulse to R26. Cover switch 2 with a piece of
insulating tape to prevent short circuits with the Unipulse board.
GND and voice triggers:
- Connect the GND wire from Unipulse to the jumper between C6 and C7 as shown in the picture. Connect P3, P7, P8 and P9 to the points shown in the picture, refer to the schematics for exact placement.
- Connect P6, P11 and P12 to the points shown in the picture, refer to the schematics for exact placement.
Start/Stop:
Connect P4 und P13 from Unipulse to the points shown in the picture (upper PCB
of the DR-110)
That’s it. Now you need to put it all back together. It’s a tight fit, but if
you took care while placing the board and switch 2 it should work out
smoothly.
Have fun.