You’ve got a card?

 Pineapple IIc 1.3.0. Copper and silk pattern may change in future version.

Pineapple IIc 1.3.0. Copper and silk pattern may change in future version.

Congratulations!

You’ve got the latest version of Pineapple Computer named Pineapple IIc. But what is Pineapple Computer? Well, it is a MIDI computer that can covert analog signals to MIDI (digital) signal. Now you may want to ask, I guess, what is it for? The Pineapple Computer is an artist-friendly super-easy-to-use computer! You plug power, sensor, MIDI instrument, and boom! Everything is set up.

How to setup (Hardware)

 Backside of Pineapple IIc 1.3.0.

Backside of Pineapple IIc 1.3.0.

Install the following components.

  • MC1—Arduino Micro 5V

  • IC1—74LS07

  • OK1—TLP552

  • D1—1N4148

  • R1-3—220

  • R4—10k

  • RN1—330

  • RN2—10k

  • C1—0.1u

  • C2-3—0.01u

  • L1-7—Vf=2.2, If=20m, Green

  • L8 (labeled RCV)—Vf=2.2, If=20m, Red

  • SW1—HEX Complementary

  • JP1—Pinheader 2x4p, Bridge 1-2, 3-4, 5-6

  • Con. Analog—ML 14p, right angle (ML14L)

  • Con. DC—DC Jack

  • Con. MIDI—DIN 5p

How to setup (Software)

Download Pineapple IIc Basic sketch and transfer the sketch via Arduino IDE.

How to play

To be written.

 Schematic of Pineapple IIc (prerelease version). Please find out the latest version at GitHub.

Schematic of Pineapple IIc (prerelease version). Please find out the latest version at GitHub.

Shopping List

Item Name Spec. # Online shops in Japan Street Price as of 2018 (JPY)
MC MC1 Arduino Micro 5V 1 Switch Science, Amazon
IC IC1 74LS07 1 Eleshop, Marutsu 69
Optocoupler OK1 TLP552 1 Eleshop, Marutsu 342
Diode D1 1N4148 1 Eleshop, Marutsu 102 for 10 units
Resistor R1-3 220, 1/8W 3 Eleshop 5
Resistor R4 10k, 1/8W 1 Eleshop 5
Resistor Net RN1 8 elements, 330, 1/8W 1 Eleshop 43
Resistor Net RN2 8 elements, 10k, 1/8W 1 Eleshop 43
Capacitor C1 0.1u, 50V 1 Eleshop 21
Capacitor C2-3 0.01u, 50V 2 Eleshop 31
LED L1-7 Green, If=20m 7 LED Paradise 21
LED L8 Yellow, If=20m 1 LED Paradise 21
SW. SW1 HEX. Comprementary 1 Eleshop, Marutsu 411
Con. JP1 Pinheader 2x4p 2 Eleshop 133
Con. JP1 Bridge 2p 3 Eleshop 31
Con. Analog ML14L 1 Eleshop, Marutsu 118
Con. PWR12V DC Jack 1 Eleshop, Marutsu 53
Con. MIDI DIN 5p receptacle 2 Eleshop, Akizuki
Power DC Power (12V1A) 1 Akizuki 990

IMG_6780.JPG

Extending Pineapple IIc

To use relay

Install the following components as well as Basic components.

Item Name Spec. # Note
Transistor T1 2SC1815 1
Diode D2 1N4148 1
Resistor R5-6 10k 2
Relay K1 G5V-1 DC5V 1
Con. Relay PH 3p 1

Also you need to bridge 7-8 of JP1.

To use I2C

Install the following components as well as Basic components.

Item Name Spec. # Note
Signal level converter IC2 PCA9517ADP 1 Put A-side up, B-side down.
Resistor R7-8 6.8k 2
Con. I2C SH 5p 1 D7 operates at 5V.

You need to un-bridge 1-5, 2-6, 3-7 of JP1. (D2/SDA and D7 are connected to SW1, and D3PWM/SCL is connected to PWM0 via JP1.)

To use RST

Install the following components at back side as well as Basic components.

Item Name Spec. # Note
Con. RST (Back) PH 2p 1

To use LIGHTDRIVE

Install the following components as well as Basic components except for SW1. Since Arduino's D8 and D12 pins share SW1 connections and LIGHTDRIVE pins, you need to remove SW1.

Item Name Spec. # Note
Con. LIGHTDRIVE Pinheader 7p 1

The LIGHTDRIVE pinouts are:

Lightdrive Meaning Arduino Pin
1 Vcc
2 GND
3 GSCLCK D5PWM
4 BLANK D8
5 XLAT D12
6 SCLCK SCLK
7 SIN MOSI

To use extra GND pins

Install the following components at back side as well as Basic components.

Item Name Spec. # Note
Con. GND (back) Pinheader/socket 2x3p 1

To use panel-mounted MIDI connector

Install the following components at back side as well as Basic components.

Item Name Spec. # Note
Con. MIDI (back) PH 5p 1

To use panel-mounted DC Jack

Install one of the following components as well as Basic components.

Item Name Spec. # Note
Con. PWR1 Pinheader 2p 1
Con. PWR2 (back) PH 2p 1

To use XOUT

XOUT is designed for extra MIDI OUT capability. It is a direct output of Open Collector so that you may want to install 220-ohm resistor for use as MIDI OUT.

Install the following components as well as Basic components.

Item Name Spec. # Note
Con. XOUT Pinheader 5p 1

To use DIGITAL extension

You can hook L1-L7 driver pins by using DIGITAL pins. It also provides +3.3V DC.

Install the following components as well as Basic components.

Item Name Spec. # Note
Con. DIGITL Pinheader 9p 1

To stack multiple cards

To stack multiple cards, you can do one of the following options.

  • Use spacer. Pineapple IIc has four M2 holes at each corners ((3, 3), (88, 3) (88, 52), (3, 52) mm).
  • Use Pinheaders of Vcc (bottom left), 3V3 (bottom right), Pogo (top right), Vcc (top left) and perhaps GND (next to the Vcc at top left).
 Mounting holes for Pineapple IIc 1.5.0-RELEASE and later.

Mounting holes for Pineapple IIc 1.5.0-RELEASE and later.

Shopping List for Extending Pineapple IIc

Item Name Spec. # Online shops in Japan Street price as of 2018 (JPY)
Signal level converter IC2 PCA9517ADP Breakout 1 Switch Science
Transistor T1 2SC1815Y 1 Eleshop 21
Diode D2 1N4148 1 Eleshop, Marutsu 102 for 10 units
Resistor R5-6 10k, 1/8W 2 Eleshop 5
Resistor R7-8 6.8k, 1/8W 2 Eleshop
Relay K1 G5V-1 5V 1 Eleshop 237
Con. Alt. MIDI JST PH 5p 1 Eleshop
Con. DIGITAL Pinheader 9p 1 Eleshop, Switch Science 125 for 40p
Con. GND Pinheader/socket 2x4p 1 Eleshop 51
Con. I2C JST SH 5p 1 Marutsu
Con. LIGHTDRIVE Pinheader 7p 1 Eleshop, Switch Science
Con. Pogo Pinheader 1p 1 Eleshop, Switch Science
Con. PWR1 Pinheader 2p 1 Eleshop, Switch Science
Con. Relay JST PH 3p 1 Eleshop
Con. RST, PWR2 JST PH 2p 2 Eleshop
Con. XOUT Pinheader 5p 1 Eleshop, Switch Science
Spacer Raspberry Pi compatible (M2.6) 1 Switch Science

Current: 1.5 Support branch

Latest release: 1.5.0-RELEASE