2 layers101.3 × 108.2 mm
2 layers91.2 × 108.2 mm
Switches
Len42/Synth50Eurorack synthesizer module designs
- Size
- 91.2 × 108.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 106
- Nets
- 72
- Pads
- 330
- Tracks, vias
- 698, 24
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 9 Dec 2021
- Updated
- 27 Nov 2024
Overview
Switches is an open-source printed circuit board by Len42, from the Len42/Synth repository on GitHub. It is a 2-layer board of 91.2 × 108.2 mm with 106 parts on 72 nets, routed with 698 tracks and 24 vias.
It is built around the SN74HCS74D and J109. Its parts include 44 resistors, 21 capacitors, 13 connectors, 12 transistors and 4 ICs. It belongs with the audio and music boards of this library.
Main components
2
SN74HCS74D
SOIC-14-40℃~+125℃ 0ns 1 105MHz 15ns@6V,50pF 2 2V~6V 2uA 5pF 6ns 7.8mA 7.8mA 74HCS Series Asynchronous Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSTexas InstrumentsFlip Flops
J109
TO-92-3L-55℃~+150℃ 1 N-channel 12Ω 25V 2V 40mA 625mW N-Channel TO-92-3L JFETs ROHSonsemiJFETs
README
modules/Noise-SH/README.mdNoise / Sample & Hold
4HP Eurorack Module
Features
- White and pink(ish) noise output
- Sample-and-hold with variable slew rate
- S&H can be triggered by an internal clock or external input
- Internal clock is output on the trigger jack when selected
Notes
This module is built using the Delptronics Module Construction Set which includes PCBs for the front panel controls and other components. The PCB layout file is just a guide showing how I placed the components on the Delptronics boards. (It's a bit of a mess - sorry!)
Please note that I am a hobbyist, not a trained electronics engineer. No guarantees!
Acknowledgements
Software Used
KiCad 5.1.10-1
© 2022 Len Popp
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Parts
106| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 10K | -lmp-misc:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R11, R12, R13, R14, R17, R18, R19, R20, R23, R24, R25, R26, R33 +8 |
| 14 | 100N | -lmp-misc:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7, C8, C13, C14, C15, C16, C18, C21 |
| 8 | J109 | -lmp-misc:TO-92_Inline_Wide | Q3, Q4, Q5, Q6, Q9, Q10, Q11, Q12 |
| 8 | WQP-PJ398 | -lmp-synth:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J1, J2, J3, J4, J5, J6, J7, J8 |
| 4 | 100k | -lmp-misc:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R10, R31, R32 |
| 4 | 1K | -lmp-misc:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R6, R27, R28 |
| 4 | 1N | -lmp-misc:C_Disc_D5.0mm_W2.5mm_P2.50mm | C11, C12, C19, C20 |
| 4 | 240K | -lmp-misc:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R15, R16, R37, R38 |
| 4 | 2N3906 | -lmp-misc:TO-92_Inline_Wide | Q1, Q2, Q7, Q8 |
| 4 | 330R | -lmp-misc:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8, R29, R30 |
| 4 | D6RLxxF1 | -lmp-synth:SW_Push_LED_C&K_D6R | SW1, SW2, SW3, SW4 |
| 4 | MountingHole_M3 | -lmp-holes:MountingHole_PCB_3.2mm_M3 | H2, H4, H7, H9 |
| 3 | 10U | -lmp-misc:CP_Radial_D5.0mm_P2.50mm | C9, C10, C17 |
| 2 | 1K | -lmp-stripboard:SB_Gen_1 | R22, R44 |
| 2 | 1K | -lmp-misc:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R21, R43 |
| 2 | Logo_CC_BY | -lmp-misc:Logo_CC_BY | G1, G6 |
| 2 | Logo_OSHW | -lmp-misc:Logo_OSHW | G3, G5 |
| 2 | SN74HCS74 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2, U4 |
| 2 | TL074 | Package_DIP:DIP-14_W7.62mm | U1, U3 |
| 1 | Conn_Back_Bottom | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J13 |
| 1 | Conn_Back_Top | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J12 |
| 1 | Conn_Eurorack_16 | -lmp-synth:IDC-Header-Eurorack-16-TH | J9 |
| 1 | Conn_Front_Bottom | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | J11 |
| 1 | Conn_Front_Top | Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical | J10 |
Questions
How big is the Switches PCB?
It measures 91.2 × 108.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Switches use?
106 parts, built around the SN74HCS74D and J109. 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 Switches KiCad files?
From the Len42/Synth repository on GitHub, at the commit this page was made from: the board is modules/Switches/Switches.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Switches design in my own project?
Its repository states no licence, so its author keeps all rights: ask Len42 before reusing the design.
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