2 layers100 × 100 mm
2 layers103.7 × 33.7 mm
Lfo
wehrend/lfo- Size
- 103.7 × 33.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 33
- Nets
- 27
- Pads
- 94
- Tracks, vias
- 329, 12
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 May 2025
- Updated
- 27 Jun 2025
Overview
Lfo is an open-source printed circuit board by wehrend, from the wehrend/lfo repository on GitHub. It is a 2-layer board of 103.7 × 33.7 mm with 33 parts on 27 nets, routed with 329 tracks and 12 vias.
It is built around the TL084 and BC547. Its parts include 15 resistors, 6 capacitors, 4 diodes, 4 connectors and 1 IC.
Main components
2Parts
33| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10, R11, R14, R15 |
| 2 | 100nFC | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C4 |
| 2 | 10µFC_Polarized | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C3, C7 |
| 2 | 1N5817 | Diode_THT:D_DO-201AD_P3.81mm_Vertical_AnodeUp | D3, D4 |
| 2 | 1kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R9 |
| 2 | 2.2kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R7 |
| 2 | 2.2µFC_Polarized | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2, C5 |
| 2 | 4.7kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R5 |
| 1 | 100R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 100kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16 |
| 1 | 100kR | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R13 |
| 1 | 15kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R8 |
| 1 | 1N4148 | Diode_THT:D_DO-41_SOD81_P2.54mm_Vertical_AnodeUp | D1 |
| 1 | 47kR | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R12 |
| 1 | BC547 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | Conn_02x05_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x05_P2.54mm_Vertical | J4 |
| 1 | LED | LED_THT:LED_D5.0mm | D2 |
| 1 | PJ398SM-12 (Tri) | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J1 |
| 1 | PJ398SM-12 (square) | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
| 1 | PJ398SM-12 (weird) | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | R_Potentiometer | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1 |
| 1 | SW_SPDT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | SW1 |
| 1 | TL084 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U1 |
Questions
How big is the Lfo PCB?
It measures 103.7 × 33.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lfo use?
33 parts, built around the TL084 and BC547. 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 Lfo KiCad files?
From the wehrend/lfo repository on GitHub, at the commit this page was made from: the board is lfo.kicad_pcb and its schematic lfo.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lfo design in my own project?
Its repository states no licence, so its author keeps all rights: ask wehrend before reusing the design.
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