2 layers39.7 × 109.8 mm
4 layers39.4 × 110.3 mm
Betula Main
Cs4System/Eurorack83Blattwerk Eurorack modules. Designed by Lorenz Neumann
- Size
- 39.4 × 110.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 176
- Nets
- 135
- Pads
- 668
- Tracks, vias
- 2,276, 303
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 6 Feb 2021
- Updated
- 6 Mar 2025
Overview
Betula Main is an open-source printed circuit board by Cs4System, from the Cs4System/Eurorack repository on GitHub. It is a 4-layer board of 39.4 × 110.3 mm with 176 parts on 135 nets, routed with 2,276 tracks and 303 vias.
It is built around the TLV9354ID, 74HCT125PW and R-78K3.3-0.5, with the R-78K6.5-0.5, TLV9352ID and TL062 among its other parts. Its parts include 75 capacitors, 61 resistors, 19 ICs, 6 connectors and 5 diodes. It belongs with the audio and music boards of this library.
Main components
12
TLV9354ID
SOIC-14-20V~-2.25V、2.25V~20V -40℃~+125℃ 1.5uV/℃ 10pA 10pA 110dB 15nV/√Hz@1kHz 20V/us 3.5MHz 350uV 4 4.5V~40V 600uA 60mA ESD protection、EMI filtering/RF suppression Rail-to-rail output SOIC-14 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
74HCT125PW
TSSOP-14-40℃~+125℃ 1 15ns@4.5V,50pF 160uA 4 4.5V~5.5V 6mA 6mA 74HCT Tri-State Unidirectional TSSOP-14 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
R-78K3.3-0.5
SIP,11.5x7.6mm1 3.3V 4.5V~36V 500mA 89% SIP,11.5x7.6mm Isolated Power Modules ROHSRECOM PowerIsolated Power ModulesR-78K6.5-0.5
SIP,11.5x7.6mm1 500mA 6.5V 8V~36V 93% SIP,11.5x7.6mm Isolated Power Modules ROHSRECOM PowerIsolated Power Modules
TLV9352ID
SOIC-8-2.25V~20V -40℃~+125℃ 1.5uV/℃ 1.8mV 10pA 10pA 110dB 15nV/√Hz@1kHz 2 20V/us 3.5MHz 4.5V~40V 60mA 800uA ESD protection、EMI filtering/RF suppression Rail-to-rail output SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
TL062
SOP-810uV/℃ 2.2MHz 200uA 3mV 3pA 4 47nV/√Hz@1kHz 5V/us 84dB Short-Circuit Protection SOP-8 FET Input Amplifiers ROHSGcoreOperational Amplifier
PCM1803ADB
SSOP-20-40℃~+85℃ 2 24 4.5V~5.5V I2S SSOP-20 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
74HC4050D
SOP-16SOP-16 Specialty Logic ROHSToshibaSpecialty Logic
LDK320AM-R
SOT-23-5-40℃~+125℃@(Tj) 1 1.2V~12V 18V 200mA 350mV@(200mA) 60uA 60uVrms 83dB@(120Hz) Adjustable Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsV1401
SOP20WSOP20W New Arrivals ROHSCoolaudioUncategorised
V1402
SOP-24SOP-24 New Arrivals ROHSCoolaudioUncategorisedDMN3030LSS
SO-8-55℃~+150℃ 1 N-channel 124pF 12nC@10V 18mΩ@10V 2.1V 2.5W 30V 741pF 95pF 9A SO-8 MOSFETs ROHSDiodes IncorporatedMOSFETs
README
README.mdEurorack
-
All files are published under CC BY-NC-SA 4.0 if not marked differently
-
DO NOT USE COMMERCIALLY!
-
Build for yourself or for a friend, but do not sell builds, PCBs, pannels or any parts of the designes in this repository!
-
Feel free to modify, copy and use all files provided here. If you want to publish derivative work, please do so under same license as original
-
Any feedback and collaboration is very welcome!
-
Please feel free to open an issue on the issues tab
Have you built a module and would like to say thank you? https://paypal.me/LorenzNeumann
Blattwerk - Betula
- 8 channels In/Out ADAT Interface
- Outputs are DC coupled
- Inputs can be switched with jumpers between AC and DC coupling (In 2 groups: channel 1-4 and channel 5-8)
- Low noise: -110dB
- Low THD: >0.01% @ 1kHz, -6dB(+-5Vpp)
- 22kOhm input-impedance, 1kOhm output-impedance
- 8HP
- All channels with bicolored indicator LED
- ADAT sync indicator LED
- No μController, no programming required, hardware only
- CC BY-NC-SA 4.0 DO NOT USE COMMERCIALY!
- small and dense SMD build (0603,TSSOP)
- 180mA @ +12V and 100mA @ -12V (Without connected ADTA-signal: 14mA @ +12V and 0mA @ -12V)
Blattwerk - Salix
- VCF based on the Moog Transistor Ladder Filter
- Compensation for loss of bass in high resonance settings via potentiometer
- 6,12,18,24 dB/Oct selectable via potentiometer or CV!
- 2 Inputs with attenuator for audio and CV
- Seperate V/Oct input.
- Input-Drive indicator LED
- 8HP
- small and dense SMD build (0603, SOIC, SOT-363!) Not a beginner build, please be sure to have some SMD-soldering practice!
- 45mA @ +12V and 25mA @ -12V
- quick demo: https://youtu.be/XMdGtwIK5IQ
Transistor Ladder VCF
- Deprecated version of Salix VCF
- VCF based on the Moog Transistor Ladder Filter
- Compensation for loss of bass in high resonance settings via potentiometer
- 6,12,18,24 dB/Oct selectable via potentiometer or CV!
- 2 Inputs with attenuator for audio and CV
- Seperate V/Oct input.
- Input-Drive indicator LED
- 8HP
- CC BY-NC-SA 4.0
- small and dense SMD build (0603, SOIC, SOT-363!)
- 45mA @ +12V and 25mA @ -12V
- PCB and Panel is available at synthCube
- Quick demo: https://youtu.be/XMdGtwIK5IQ
Dual Ears
- BETA!
- Modification of Mutable Instruments Ears
- 2 seperat channels of original design, no internal contact microphone
- no jumpers, fixed values for fast Envelope Follower and Gate-Threshold of 1V
- 4HP
- CC-BY-SA 3.0, Orginal schematics by Emilie Gillet
- small and dense SMD build (0603, TSSOP)
Parts
176| Qty | Value | Footprint | References |
|---|---|---|---|
| 50 | 5k6 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R10, R11, R12, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25 +34 |
| 28 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4, C10, C11, C12, C14, C18, C20, C21, C23, C26, C27, C29, C30, C33, C52 +12 |
| 19 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C5, C13, C15, C16, C17, C19, C22, C24, C25, C28, C31, C32, C45, C73 +3 |
| 16 | 330p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C41, C42, C43, C44, C48, C49, C50, C51, C56, C57, C58, C59, C61, C62, C64, C65 |
| 8 | 500R | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8 |
| 7 | 47 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R55, R56, R57, R58, R59, R60, R61 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C34, C35, C36, C68 |
| 4 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C46, C47, C66, C75 |
| 4 | PCM1803A | Package_SO:SSOP-20_5.3x7.2mm_P0.65mm | U1, U2, U3, U4 |
| 4 | TLV9354 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U12, U13, U15, U16 |
| 3 | 1N5819 | Diode_SMD:D_SOD-123 | D3, D4, D5 |
| 3 | 220k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4, R13 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C38, C39, C40 |
| 2 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4, J5 |
| 1 | 20p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C37 |
| 1 | 2k2 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 74HC4050 | Package_SO:SO-16_3.9x9.9mm_P1.27mm | U8 |
| 1 | 74HCT125 | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U11 |
| 1 | Conn_02x02_Top_Bottom | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J2 |
| 1 | Conn_02x05_Odd_Even | Eigenes:Multicomp_MC9A12-1034_2x05x2.54mm_Straight | J6 |
| 1 | Conn_02x15_Top_Bottom | Eigenes:Output-Main | J3 |
| 1 | Conn_02x15_Top_Bottom | Eigenes:analogIN-Main | J1 |
| 1 | DMN3030LSS | Package_SO:SO-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | FDS4435BZ | Package_SO:SO-8_3.9x4.9mm_P1.27mm | Q2 |
| 1 | LDK320A | Package_TO_SOT_SMD:SOT-89-3 | U5 |
| 1 | LED_Green | LED_THT:LED_D3.0mm | D2 |
| 1 | LED_RED | LED_THT:LED_D3.0mm | D1 |
| 1 | PCM1681TPWPQ1 | Eigenes:PCM1681TPWPQ1 | U7 |
| 1 | R-78K3.3-0.5 | Eigenes:Converter_DCDC_RECOM_R-78K | U19 |
| 1 | R-78K5-0.5 | Eigenes:Converter_DCDC_RECOM_R-78K | U18 |
| 1 | R-78K6.5-0.5 | Eigenes:Converter_DCDC_RECOM_R-78K | U17 |
| 1 | TL062 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | TLV9352 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U14 |
| 1 | V1401 | Package_SO:SOP-20_7.5x12.8mm_P1.27mm | U10 |
| 1 | V1402 | Package_SO:SOP-24_7.5x15.4mm_P1.27mm | U9 |
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Questions
How big is the Betula Main PCB?
It measures 39.4 × 110.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Betula Main use?
176 parts, built around the TLV9354ID, 74HCT125PW, R-78K3.3-0.5 and R-78K6.5-0.5. 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 Betula Main KiCad files?
From the Cs4System/Eurorack repository on GitHub, at the commit this page was made from: the board is Betula/Betula_Main/Betula_Main.kicad_pcb and its schematic Betula/Betula_ADAT/Betula_ADAT.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Betula Main design in my own project?
Its repository states no licence, so its author keeps all rights: ask Cs4System before reusing the design.