4 layers53.1 × 113.2 mm Vm129-cpu, the printed circuit board in 3D

Vm129-cpu

Multichannel modular analog PAL video mixer based on the SYNKIE project

Size: 53.1 × 113.2 mm
Copper layers: 4
Thickness: 4.69 mm
Parts: 98
Nets: 100
Pads: 382
Tracks, vias: 1,000, 116
Pours: 1
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 20 Aug 2020
Updated: 5 Dec 2024

Overview

Vm129-cpu is an open-source printed circuit board by mirdej, from the mirdej/vmix repository on GitHub. It is a 4-layer board of 53.1 × 113.2 mm with 98 parts on 100 nets, routed with 1,000 tracks and 116 vias.

It is built around the 74HC244D, ESP32-S3-WROOM-1-N8 and LM1881, with the LMH6643MM, MAX4392ESA+ and LM311 among its other parts. Its parts include 38 resistors, 21 capacitors, 20 connectors, 13 ICs and 2 diodes. It belongs with the ESP32 boards of this library.

Main components

README

README.md

ANYMIX 21

Product Photo

Multichannel modular analog PAL video mixer based on the SYNKIE project

The Anymix21 is a 12 channel analog video mixer based on the paradigm of classic audio mixing desks.

Each channel is a complete SYNKIE by itself, sort of. It can handle anything from DC to around 10Mhz, this means you can mix CV signals with audio with PAL composite video signals. Contrary to an audio mixer, inputs are DC coupled, with 0v being black and 0.7V white level. Negative levels are permitted but will be clipped at the final output stage.

Each channel has a built-in equaliser, switchable edges (bandpass), comparator and inverter effects, and a scale-bias module for adjusting brightness and contrast. The signal can then be routed to 3 main output mix busses and an auxiliary output.

Apart from the equalizer, the effects and mix levels are digitally controlled analog, so parameters can be recorded, automated, or controlled externally through MIDI. The desk can be synchronized to a MIDI clock (which is then quantized to the vertical blanking interval derived from the genlock input).

six channels

Still under construction, the first 6 channels have passed their endurance test running daily for weeks at the exhibiton “H.o.Me. – Heim für obsolete Medien” at Kunsthaus Langenthal.

Documentation

Architecture Overview
Mixer Channel: Flowchart and description
Master Section: Flowchart and description

Parts

Qty	Value	Footprint	References
13	100n	synkie_footprints:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder	C3, C4, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19
7	3k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R11, R12, R14, R15, R17, R20, R21
5	4k7	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R1, R7, R8, R9, R10
4	UMCC	synkie_footprints:TE_UMCC_2337019-1	J13, J15, J17, J18
3	10k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R2, R33, R36
3	220	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R27, R28, R29
3	75	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R30, R31, R35
3	750	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R18, R22, R24
3	Ferrite_Bead	synkie_footprints:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder	FB1, FB2, FB3
2	10u	synkie_footprints:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder	C1, C6
2	2k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R6, R13
2	510k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R5, R19
2	5k1	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R25, R32
2	74HC244	Package_SO:SO-20_12.8x7.5mm_P1.27mm	U4, U13
2	C	synkie_footprints:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder	C8, C20
2	CP	synkie_footprints:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder	C2, C5
2	Conn_Coaxial	synkie_footprints:BNC_MOLEX_0731000080_Horizontal	J12, J14
2	LM311	synkie_footprints:SOIC-8_3.9x4.9mm_P1.27mm	U2, U3
1	100	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R23
1	180	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R4
1	1k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R3
1	1u	synkie_footprints:C_1206_3216Metric_Pad1.42x1.75mm_HandSolder	C7
1	1u	synkie_footprints:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder	C21
1	300	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R16
1	300	synkie_footprints:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder	R34
1	4053	synkie_footprints:SOIC-16_3.9x9.9mm_P1.27mm	U10
1	47k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R26
1	4N25	Package_DIP:DIP-6_W8.89mm_SMDSocket_LongPads	U6
1	4k7	synkie_footprints:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder	R38
1	680k	synkie_footprints:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R37
1	BAT54S	Package_TO_SOT_SMD:SOT-23	D2
1	Conn_01x02	synkie_footprints:PinHeader_1x02_P2.54mm_Vertical	J16
1	Conn_01x06	anyma_footprints:AnymaPOGO-ISP	J20
1	D	Diode_SMD:D_MiniMELF	D1
1	Digital-Supply	synkie_footprints:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical	J5
1	Digitalbus	synkie_footprints:IDC-Header_2x05_P2.54mm_Vertical	J6
1	ESP32-S3-WROOM	2022_midi_controller:ESP32-S3-WROOM	U12
1	Frontpanel	synkie_footprints:IDC-Header_2x05_P2.54mm_Vertical	J7
1	GENLOCK	synkie_footprints:Solderpad_1mm	J11
1	LD1117S33TR_SOT223	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U1
1	LM1881	synkie_footprints:SOIC-8_3.9x4.9mm_P1.27mm	U11
1	LMH6643	synkie_footprints:SOIC-8_3.9x4.9mm_P1.27mm	U8
1	LOGO	Symbol:OSHW-Logo2_7.3x6mm_SilkScreen	U7
1	LOGO	anyma_footprints:logo_anyma	U5
1	MAX4392	synkie_footprints:SOIC-8_3.9x4.9mm_P1.27mm	U9
1	MIDI	synkie_footprints:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J9
1	MountingHole_Pad	MountingHole:MountingHole_2.7mm_M2.5_ISO7380_Pad	H1
1	Supply	synkie_footprints:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical	J1
1	Sync-Bus	synkie_footprints:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J8
1	Syncbus	synkie_footprints:IDC-Header_2x05_P2.54mm_Vertical	J4
1	USB_C_Receptacle_USB2.0	synkie_footprints:JAE_USB-C_SJ122205	J19
1	mux	synkie_footprints:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J2
1	pedals	synkie_footprints:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J10
1	triggers	synkie_footprints:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical	J3

Questions

How big is the Vm129-cpu PCB?

It measures 53.1 × 113.2 mm and has 4 copper layers, 4.69 mm thick.

What parts does the Vm129-cpu use?

98 parts, built around the 74HC244D, ESP32-S3-WROOM-1-N8, LM1881 and LMH6643MM. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Vm129-cpu KiCad files?

From the mirdej/vmix repository on GitHub, at the commit this page was made from: the board is electronics/vm129-cpu/vm129-cpu.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Vm129-cpu design in my own project?

Its repository states no licence, so its author keeps all rights: ask mirdej before reusing the design.

Category and platform

ESP32

Project files

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A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/mirdej-vmix-vm129-cpu" title="Vm129-cpu in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/mirdej-vmix-vm129-cpu.jpg" alt="Vm129-cpu" width="1200" height="900">

A picture that opens the board, for a README

[![Vm129-cpu](https://pcbkit.io/embed/boards/mirdej-vmix-vm129-cpu.jpg?size=s)](https://pcbkit.io/boards/mirdej-vmix-vm129-cpu)

Source

Repository: mirdej/vmix
Board file: electronics/vm129-cpu/vm129-cpu.kicad_pcb
Commit: 580ceb5
Licence: Not stated

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