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2 layers31.2 × 128.5 mmMiniLFO, the printed circuit board in 3D

A super simple 2HP triangle wave LFO for Eurorack modular synth. This is roughly based on David Haillant's Simple LFO.

Size
31.2 × 128.5 mm
Copper layers
2
Thickness
1.6 mm
Parts
26
Nets
18
Pads
76
Tracks, vias
109, 81
Pours
4
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
18 Feb 2023
Updated
20 Apr 2023

Overview

MiniLFO is an open-source printed circuit board by benjiaomodular, from the benjiaomodular/MiniLFO repository on GitHub, published under the MIT licence. It is a 2-layer board of 31.2 × 128.5 mm with 26 parts on 18 nets, routed with 109 tracks and 81 vias.

Its parts include 8 resistors, 6 capacitors, 1 IC, 1 diode and 1 connector.

README

README.md

MiniLFO

A super simple 2HP triangle wave LFO for Eurorack modular synth. This is roughly based on David Haillant's Simple LFO.

MiniLFO

More info on my website: https://benjiaomodular.com/posts/minilfo

MiniLFO Schematic

Parts

26
QtyValueFootprintReferences
3100kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR2, R3, R4
2100nFCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC4, C5
21kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR7, R8
222uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC3, C6
2B100kbenjiaomodular:Potentiometer_RV09RANGE1, TIME1
110kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR6
110nFbenjiaomodular:Capacitor_Rect_L7.2mm_W2.5mm_P5.00mmC2
110uFbenjiaomodular:Capacitor_Radial_D5.0mm_P2.5mmC1
14.7kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR5
1470Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR1
1AudioJack2_SwitchTbenjiaomodular:AudioJack_3.5mmTRI_OUT1
1IDC_2x05Connector_IDC:IDC-Header_2x05_P2.54mm_VerticalJ1
1LED_Dual_BidirectionalLED_THT:LED_D3.0mmD1
1SW_SPDTbenjiaomodular:ToggleSwitch_MTS-102_SPDTSW1
1TL074Package_SO:SOIC-14_3.9x8.7mm_P1.27mmU1

The 21 most common of 26 parts.

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Questions

How big is the MiniLFO PCB?

It measures 31.2 × 128.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the MiniLFO use?

26 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 MiniLFO KiCad files?

From the benjiaomodular/MiniLFO repository on GitHub, at the commit this page was made from: the board is MiniLFO v1.0/MiniLFO.kicad_pcb and its schematic MiniLFO v1.0/Eurorack Power.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the MiniLFO design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).