Pineapple II
About Pineapple II
Prototype of Pineapple II
Pineapple II is an artist-friendly super-easy-to-use computer. It can covert analog signals to MIDI (digital) signal. You plug power, sensor, MIDI instrument, and everything is set up.
We open-sourced everything you’ll need to copy this tiny computer—the schematic, the artwork, component list, built-in software, and case design. These artworks, codes, configurations, designs, and other documents are open under the GPLv3.
And, prepackaged Pineapple II will be available at Pineapple Store soon.
Schematic of Pineapple II (prerelease version)
Panel layout for Takachi’s MXA2-8-12.
Panel layout for Takachi’s MXA2-8-12.
Shopping List
| Item | Name | Spec. | # | Online stores in Japan |
|---|---|---|---|---|
| MC | MC1 | Arduino Micro 5V | 1 | Switch Science, Amazon |
| IC | IC1 | 74LS07N | 1 | |
| Transistor | T1 | 2SC1815 | 1 | |
| Diode | D1, D2 | 1N4148 | 2 | |
| Optocoupler | OK1 | TLP552 | 1 | |
| Relay | K1 | G5V-1 | 1 | |
| Resistor | R1 | 330 | 1 | |
| Resistor | R2, R3 | 6.8k | 2 | |
| Resistor | R4, R5, R6 | 220 | 3 | |
| Resistor | R7, R8 | 10k | 2 | |
| Resistor Net | RN1, RN2, RN3 | 4-element 10k | 3 | |
| Capacitor | C1 | 0.1u | 1 | |
| Capacitor | C2, C3 | 0.01u | 2 | |
| Encoder SW. | TH | HEX. complimentary | 1 | |
| Con. | FRONT | JST PH 4p | 1 | |
| Con. | GPII, D terminal adaptor | ML14L | 2 | |
| Con. | I2CSW | Pinheader 2x3p | 1 | |
| Con. | MIDI | JST PH 5p | 1 | |
| Con. | PWR12V | JST PH 2p | 1 | |
| Con. | Vcc | JST PH 3p | 1 | |
| Logic board | Pineapple II Logic board | 1 | ||
| SW. LED | Momentary SW with LED (Green) | 1 | ||
| DC Jack | Panel mounted DC Jack | 1 | ||
| D terminal | Panel mounted D terminal receptacle | 1 | ||
| D terminal adaptor | D terminal adaptor board | 1 | ||
| MIDI terminal 1 | Panel mounted DIN receptacle 5p | 1 | ||
| MIDI terminal 2 | Panel mounted DIN receptacle 8p | 1 | ||
| USB plug | USB Mini B plug | 1 | ||
| Wiring harness | Front panel | JST PH 4p wiring harness | 1 | |
| Wiring harness | MIDI | JST PH 5p wiring harness | 1 | |
| Wiring harness | Power | JST PH 2p wiring harness | 1 | |
| Flat cable | 14p flat cable with ML box sockets | 1 | ||
| Case | Pineapple II case | 1 | ||
| Power supply | DC12V1A | 1 | ||
| Wire |
Current status: Rev. 1.2.0 Release branch (preparing for the official release)