Pineapple II

About Pineapple II

 Prototype of 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)

Schematic of Pineapple II (prerelease version)

 Panel layout for  Takachi’s MXA2-8-12 .

Panel layout for Takachi’s MXA2-8-12.

 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)