2 layers110 × 90 mm
2 layers49.9 × 100 mm
Random trigger
mplsartindustry/random-triggerEurorack trigger randomizer and white noise generator
- Size
- 49.9 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 68
- Nets
- 58
- Pads
- 205
- Tracks, vias
- 283, 9
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 1 Nov 2024
- Updated
- 8 Sep 2026
Overview
Random trigger is an open-source printed circuit board by mplsartindustry, from the mplsartindustry/random-trigger repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 49.9 × 100 mm with 68 parts on 58 nets, routed with 283 tracks and 9 vias.
Its parts include 34 resistors, 10 connectors, 8 diodes, 7 capacitors and 4 ICs. It belongs with the audio and music boards of this library.
README
README.mdrandom-trigger
Eurorack trigger randomizer and white noise generator
Front View:
Back View:
Parts
68| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R10, R12, R13, R14, R15, R16, R17, R22, R27, R29, R30, R31, R32, R33, R34 |
| 8 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R6, R7, R18, R19, R23, R24 |
| 6 | LED | LED_THT:LED_D3.0mm | D2, D3, D4, D6, D7, D8 |
| 4 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R11, R21, R28 |
| 4 | 1k5 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R8, R9, R25, R26 |
| 4 | 470n | Capacitor_THT:C_Rect_L7.2mm_W3.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C4, C5, C6, C7 |
| 2 | 1n4001 | Diode_THT:D_A-405_P7.62mm_Horizontal | D1, D5 |
| 2 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2 |
| 2 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R20 |
| 2 | 47u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1, C2 |
| 2 | B100k | MAI_Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2 |
| 1 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C3 |
| 1 | 4013 | MAI_Package_DIP:DIP-14_W7.62mm_Socket_WithChip | U3 |
| 1 | 4081 | MAI_Package_DIP:DIP-14_W7.62mm_Socket_WithChip | U4 |
| 1 | Eurorack Power | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J1 |
| 1 | Gate Out A | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J3 |
| 1 | Gate Out B | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J8 |
| 1 | Inv Trigger Out A | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J5 |
| 1 | Inv Trigger Out B | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J10 |
| 1 | L78L05_TO92 | Package_TO_SOT_THT:TO-92_Inline | U1 |
| 1 | Noise Out | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J6 |
| 1 | TL074 | MAI_Package_DIP:DIP-14_W7.62mm_Socket_WithChip | U2 |
| 1 | Trigger In A | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J2 |
| 1 | Trigger In B | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J7 |
| 1 | Trigger Out A | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J4 |
| 1 | Trigger Out B | MAI_Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ301BM_Vertical | J9 |
The 67 most common of 68 parts.
Questions
How big is the Random trigger PCB?
It measures 49.9 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Random trigger use?
68 parts. 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 Random trigger KiCad files?
From the mplsartindustry/random-trigger repository on GitHub, at the commit this page was made from: the board is random-trigger.kicad_pcb and its schematic random-trigger.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Random trigger design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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