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[[File:Zynthian-on-piano-02.png|thumb]]
Zynthian Mini kit is a cost effective approach to build zynthian with intention to give opportunity:
* to zynthian developers to get functional zynthian similar to v5 where they can do most of the testing
* to musician to get to know zynthian and learn their features before deciding to buy the professional kit
The main features of zynthian MINI are:
* include encoders and switches that controll zynthian software in the same way as official zynthian v5 kit using the MCP23017 i/o extender
* include MIDI IN, MIDI OUT and MIDI THRU
* include a I2S DAC for AUDIO OUT based on PMC5102 chip that is affordable to buy
* does not need any cabling inside for easy assembling
* does not need the case to test it but it include design of two type of enclosure
** simple enclosure that only cover the top and bottom part of the device that can be also produced in the same way as PCBs
** full enclosure that can be 3d printed
* all connectors are easy to reach (V1 does not have RPI connectors aligned to the edge of the PCB)
To save the cost of building the Zynthian MINI, we had to sacrifice certain features that some professional musicians would need on the stage such as:
* no audio-in
* no TRS audio connectors
* not best in the class DAC for audio out
* no rigid metal case
* no zynaptik analog inputs
Zynthian is currently at version 2. Previous version 1 was more similar to official V4 kit with only 4 buttons but it is not maintained anymore.
To assemble zynthian mini V2 version you will require:
To assemble zynthian mini V2 version you will require:
=== Components required ===
=== Components required ===
[[File:Components v2.jpg]]
[[File:Components v2.jpg|400px]]
1. Capacitors - Electrolytic - Polarized
1. Capacitors - Electrolytic - Polarized
* Value: 470u 10V
* PCB label: C1
* Package: CP_Radial_D8.0mm_P3.50mm
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/1005003189675117.html
2. Capacitor - Electrolytic - Polarized
2. Capacitor - Electrolytic - Polarized
* Value: 100u
* PCB label: C4
* Package: CP_Radial_D6.3mm_P2.50mm
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/1005003189675117.html
3. Capacitor - Film - Non-Polarized
3. Capacitor - Film - Non-Polarized
* Value: 100n
* PCB label: C2,C3,C5,C6,C7
* Package: C_Rect_L7.0mm_W2.0mm_P5.00mm
* Quantity: 5
* Where to buy: https://www.aliexpress.com/item/1005005894912292.html
4. Capacitors - Ceramic - Non-Polarized 100n and 10n
4. Capacitors - Ceramic - Non-Polarized 100n and 10n
* Value: 100n
* PCB label: C22,C16,C19,C13,C23,C20,C9,C26,C27,C32,C8,C18,C21,C34,C33,C17,C25,C11,C24,C31,C12,C15,C10,C14
* Package: C_Rect_L4.0mm_W2.5mm_P2.50mm
* Quantity: 24
* Where to buy: https://www.aliexpress.com/item/1005002290441861.htm
* Value: 10n
* PCB label: C30,C29,C35,C37,C38,C28,C39,C36
* Package: C_Rect_L4.0mm_W2.5mm_P2.50mm
* Quantity: 8
* Where to buy: https://www.aliexpress.com/item/1005002290441861.htm
5. Diode
5. Diode
* Value: 1N4148
* PCB label: D1
* Package: D_DO-35_SOD27_P7.62mm_Horizontal
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/32660088529.html
6. MIDI Connectors - PCB mountable
6. MIDI Connectors - PCB mountable
* PCB label: MIDI-OUT-J1, MIDI-IN-J1, MIDI-THRU-J1
* Package: MultiDIN5
* Quantity: 3
* Where to buy: https://www.aliexpress.com/item/1005005773478404.html
7. Resistors
7. Resistors
* Value: 220R
* PCB label: R1,R3,R5,R4,R6
* Package: R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal
* Quantity: 5
* Where to buy: https://www.aliexpress.com/item/1005005669886834.html
8. Resistor
8. Resistor
* Value: 1k
* PCB label: R2
* Package: R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/1005005669886834.html
9. Resistor
9. Resistor
* Value: 10k
* PCB label: R8,R7
* Package: R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal
* Quantity: 2
* Where to buy: https://www.aliexpress.com/item/1005005669886834.html
10. Digital Optocoupler
10. Digital Optocoupler
* Value: H11L1M
* PCB label: U2
* Package: DIP-6_W7.62mm
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/32867427644.html
11. Hex inverting Schmitt trigger
11. Hex inverting Schmitt trigger
* Value: 74HCT14
* PCB label: U1
* Package: DIP-14_W7.62mm
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/33020259485.html
12. Sound Card PCM5102
12. Sound Card PCM5102
* Value: GY-PCM5102
* PCB label: A1
* Package: GY-PCM5102
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/1005002898278583.html
13. I/O Expander
13. I/O Expander
* Value: MCP23017_SP
* PCB label: MCPMCP23017_SP1, MCPMCP23017_SP2
* Package: DIP-28_W7.62mm
* Quantity: 2
* Where to buy: https://www.aliexpress.com/item/1005005363863079.html
14. 2x20 Pin Header - male and female
14. 2x20 Pin Header - male and female
* Male:
* PCB label: HAT1
* Package: PinSocket_2x20_P2.54mm_Vertical
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/4000133266617.html
* Female:
* PCB label: RPi1
* Package: two spacer female 40pin vertical header
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/4001095693537.html
15. Encoder with a Switch
15. Encoder with a Switch
* Value:
* PCB label: Enc2,Enc4,Enc1,Enc3
* Package: RotaryEncoder_Alps_EC12E-Switch_Vertical_H20mm
* Quantity: 4
* Where to buy: https://www.aliexpress.com/item/1005006142236380.html
16. Encoder Cap
16. Encoder Cap
* Value: encoder caps
* PCB label: Encoder caps
* Package: Encoder caps
* Quantity: 4
* Where to buy: https://www.aliexpress.com/item/1005005835327286.html
17. Push Button
17. Push Button
* Value:
* PCB label:SW14,SW9,SW16,SW20,SW6,SW10,SW8,SW2,SW17,SW4,SW12,SW19,SW5,SW1,SW13,SW18,SW15,SW7,SW11,SW3
* Package: push-button
* Quantity: 20
* Where to buy: https://www.aliexpress.com/item/32912263133.html
18. 5" DSI Screen for Raspberry Pi
18. 5" DSI Screen for Raspberry Pi
* Value: Screen
* PCB label: RPI 5" screen
* Package: RPI screen
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/1005005353135304.html
19. Raspberry Pi 4 4GB with heatsink
19. Raspberry Pi 4 4GB with heatsink
* Where to buy heatsink: https://www.aliexpress.com/item/1005004774833369.html
20. 1/4 Stereo jack
20. 1/4 Stereo jack
* Value: J1
* PCB label: J1
* Package: Jack_6.35mm_Neutrik_NMJ6HFD2_Horizontal
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/4001266094691.html
21. RCA Stereo jack
21. RCA Stereo jack
* Value: J2
* PCB label: J2
* Package: RCA RS-234
* Quantity: 1
* Where to buy: https://www.aliexpress.com/item/1005001629197904.html
=== Soldering ===
=== Soldering ===
First solder resistors and diode and microchips such as Digital optocoupler (H11L1M), hex inverting schmitt trigger (74HCT14) and I/O Expander (MCP23017). Pay attention to orientation of these microchips.
First solder resistors and diode and microchips such as Digital optocoupler (H11L1M), hex inverting schmitt trigger (74HCT14) and I/O Expander (MCP23017). Pay attention to orientation of these microchips.
[[File:Soldering-step-1.png]]
[[File:Soldering-step-1.png|400px]]
Solder the ceramic and film capacitors at the back of PCB (orientation not important - they are non polarized).
Solder the ceramic and film capacitors at the back of PCB (orientation not important - they are non polarized).
[[File:Soldering-step-2.png]]
[[File:Soldering-step-2.png|400px]]
Then solder film and ceramic capacitors at the front (orientation not important - they are non polarized).
Then solder film and ceramic capacitors at the front (orientation not important - they are non polarized).
[[File:Soldering-step-3.png]]
[[File:Soldering-step-3.png|400px]]
Then solder female and male headers
Then solder female and male headers
[[File:Soldering-step-4.png]]
[[File:Soldering-step-4.png|400px]]
Then solder two electrolytic capacitors. Pay attention to their orientation.
Then solder two electrolytic capacitors. Pay attention to their orientation.
[[File:Soldering-step-5.png]]
[[File:Soldering-step-5.png|400px]]
Then solder sound card. First solder male header pins that came with the card and the solder it to PCB board.
Then solder sound card. First solder male header pins that came with the card and the solder it to PCB board.
[[File:Soldering-step-6.png]]
[[File:Soldering-step-6.png|400px]]
Make sure that you have cut sound card pins - they are too long and they will touch the screen if you leave them as it is.
Make sure that you have cut sound card pins - they are too long and they will touch the screen if you leave them as it is.
[[File:Soldering-step-7.png]]
[[File:Soldering-step-7.png|400px]]
Then solder three MIDI connectors.
Then solder three MIDI connectors.
[[File:Soldering-step-8.png]]
[[File:Soldering-step-8.png|400px]]
Then solder the switches.
Then solder the switches.
[[File:Soldering-step-9.png]]
[[File:Soldering-step-9.png|400px]]
Finally solder the encoders. After soldering them cut any excess wires because that side will be very close to RPI heatsink so any contact to it must be avoided.
Finally solder the encoders. After soldering them cut any excess wires because that side will be very close to RPI heatsink so any contact to it must be avoided.
[[File:Soldering-step-10.png]]
[[File:Soldering-step-10.png|400px]]
You have finished the hard part - soldering. Now you just need to assemble everything together.
You have finished the hard part - soldering. Now you just need to assemble everything together.
First remove two screen posts that are not necessary and could touch some of the PCB components.
First remove two screen posts that are not necessary and could touch some of the PCB components.
[[File: screen post removal.png]]
[[File: screen post removal.png|400px]]
Then connect longer cable that comes with a screen to the screen and attach the screen to PCB.
Then connect longer cable that comes with a screen to the screen and attach the screen to PCB.
[[File:Screen cable.png]]
[[File:Screen cable.png|400px]]
Then screw appropriate hex mounts to PCB for Raspberry Pi. Do not connect Raspberry Pi yet. The type of hex mounts will depend on heatsink that you use. Also connect the screen cable to RPI.
Then screw appropriate hex mounts to PCB for Raspberry Pi. Do not connect Raspberry Pi yet. The type of hex mounts will depend on heatsink that you use. Also connect the screen cable to RPI.
[[File:Rpi screen cable.png]]
[[File:Rpi screen cable.png|400px]]
Then connect heatsink to raspberry pi.
Then connect heatsink to raspberry pi.
[[File:Rpi cooler.png]]
[[File:Rpi cooler.png|400px]]
Then connect raspberry Pi to PCB.
Then connect raspberry Pi to PCB.
[[File:Rpi to pcb.png]]
[[File:Rpi to pcb.png|400px]]
== Configure Zynthian MINI V2 for testing ==
Download the latest zynthian development branch from os.zynthian.org following this [https://os.zynthian.org/2024-05-04-zynthianos-bookworm-aarch64-oram-2405.zip link].
Flash this image to sd card with a size of at least 32GB.
Put the SD card into raspberry Pi and connect zynthian mini to power by connecting USB-C power adapter to Raspberry Pi board. Use correct power adapter.
Optionally you can also connect zynthian mini to network using network cable attached to Raspberry Pi.
Wait for zynthian to start. Zynthian screen will be wrongly oriented, encoders and their push button will not work. Also none of 20 additional push buttons will work. For all this to be configured we need first to get all latest software updates that will also include required options to configure zynthian mini v2.
=== Connect to zynthian web UI to update zynthian software ===
If you have not connected zynthian to your network using network cable you will need to configure zynthian wifi first. You can do this on the screen even though screen is wrongly oriented by
* touching the top corner of the screen
* selecting admin option
* selecting wifi enable option
* selecting your network
* entering your wifi password
You will need to find out zynthian IP address by long touching top left corner of the screen where it says "Mixer" which will open the admin page and then scroll down to Network info. Select network info where you will be able to see IP address if zynthian is properly connected to your network.
Open browser on another computer and type zynthian IP addrese into browser's address bar. You will be prompted to login to zynthian web configuration UI. Oram default password is "opensynth".
=== Update zynthian oram software ===
After loging to zynthian web configuration UI click on "Software" from top navigation bar and click on "Update".
[[File:Config-step-01.png|400px]]
Wait until the software is updated. You need to make sure that it says "Update Complete" at the end of the logs.
[[File:Config-step-02.png|400px]]
Once you have updated the software restart the zynthian by clicking "System" option from top navigation and then selecting "Reboot".
[[File:Config-step-03.png|400px]]
[[File:Config-step-04.png|400px]]
=== Configuring zynthian mini v2 as a kit ===
Once zynthian oram software is updated and zynthian restarted you can configure most of zynthian MINI hardware simple by selecting the Mini V2 Kit. To do that click on "Hardware" from top bar navigation and select Kit option. On this screen select "Mini V2" kit and Save.
[[File:Config-step-05.png|400px]]
Once it is saved you will need to click on restart at the bottom of the Save page.
[[File:Config-step-06.png|400px]]
Now all hardware is configured and should work properly. Screen orientation should be correct, proper sound card selected, all encoders and switches should work properly. What is left is just few screen UI adjustments.
=== Adjusting UI for Zynthian layout ===
Zynthian Mini V2 has all encoders on the right and therefore corresponding UI widgets need to be always on the right instead of left and right that is default configuration. Also by default cursor is visible which is not necessary when there is a touch screen. To set these two options click on "Interface" from top navigation bar and select "UI options". On this screen set the field called "Graphic layout" to "Knobs at right side (Z2, V5, MINI)" and also deselect "Enable cursor" option.
[[File:Config-step-07.png|400px]]
Restart the Zynthian mini after the all configuration is done.
Once everything is configured and working it is a time to put zynthian into the enclosure.
Once everything is configured and working it is a time to put zynthian into the enclosure.
== Assembling Zynthian MINI V2 into 3d printable enclosure ==