![]() |
EagleAutodesk
|
LFO PRIME--Eurorack LFO
A simple LFO circuit, ready to go for Skiff Eurorack (8HP, +/- 12V, less than 30mm deep)
Features:
- Simple through hole construction
- Range for overall LFO frequency
- Triangle and Square with 0 crossing and 0-5V bias
- Easy to use
Please read this blog post for more information about this project: https://audiodiwhy.blogspot.com/2021/09/lfo-prime-reverse-engineering-my-own.html
You will need 2 PCBs for this project. The Gerber zip is a zip of 2 gerber (zip) files--front panel and main circuit board. Suggestion: for front panel use a black PCB with white silks. I have also included a BOM and PDF of boards and the schematic. Note that the BOM for Euro version is slightly different vs. the blog posts, which is Frac format.
LFO PRIME--Eurorack LFO
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.

Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen(Without Speaker)
BUY NOW
ESP32-S3 4.3inch Capacitive Touch Display Development Board, 800×480, 5-point Touch, 32-bit LX7 Dual-core Processor
BUY NOW
Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen(Without Speaker)
BUY NOW- Comments(0)
- Likes(2)

-
Frans Backlund Jul 23,2023
-
Engineer Sep 19,2021
- 1 USER VOTES
- YOUR VOTE 0.00 0.00
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10

-
10design
-
10usability
-
10creativity
-
10content
More by AudioDIWHY
-
Dual Concentric Pots to 4x JST XH 3 pin males Needed an easy way to add dual concentric pots to my project. The PCB featured here accommodates 2 c...
-
AS3364 Linear Quad VCA Experimenter's Board The AS3364 is a low cost, easy-to-use quad linear VCA--4 high quality voltage controlled amplifiers ...
-
Dual SOIC 2164 VCA Dual SSM 2164 VCA-SOIC versionA classic dual audio VCA design, details in the blog post:https://audi...
-
Dual SSM 2164 VCA-THT version A classic dual audio VCA design, details in the blog post here:https://audiodiwhy.blogspot.com/2025/...
-
3.5mm 4 jack PCB I needed a simple PCB for 3.5mm jacks, I like switchcraft's 35RAP series connectors for audio projec...
-
Moog T403B Inspired High Pass Filter Clone of Moog High Pass filter based on EFM design.Please see the blog post here for more informatio...
-
LFO2 From "Electronics For Musicians" Analog LFO with variable frequency and lots of modulation options based on an EFM ("Electronics for ...
-
JTAG to SWD Converter Simple JTAG to SWD adapter.My use case is Segger J-LINK EDU MINI to Raspberry Pi Pico but this board...
-
Rotary Encoder Experimenter's Dev Board UPDATE: new revision 9-29-24 posted. Lower parts count, more reliable software debouncing for the en...
-
Bench 4x2 Bluetooth Mixer Simple 14HP Eurorack 4x2 synth mixer.outputs are 2x 100mil terminal posts on rear of PCB.You will ne...
-
Anything to Clock--LM311 based I needed a simple circuit to condition incoming signals so a MCU could read them as clock:--rectify ...
-
Vactrol Based Audio Envelope Follower An audio envelope follower based on a 5C3 Vactrol. Useful for auto-wah (send its output to a bandpas...
-
Warm Floater Eurorack Power Extender I ran out of physical connections on my Eurorack Power supply. This PCB supplies 1 input and 3 outpu...
-
"KiCADSR" Euro Envelope Generator This is my first project using KiCAD for EDA instead of Autodesk Eagle.I wanted to see if I had the ...
-
Low Noise Preamp based on Arp 2600 Synthesizer The Arp 2600 synthesizer has a preamp that takes an unbalanced signal and amplifies it 10x, 100x, an...
-
Arp 2600 clone--inverter-mixer The ARP2600 is a legendary, classic semi-modular analog synthesizer. Its voltage processor circuitr...
-
SEEED XAIO RP2040 ADC and Buffer Board The SEEED XAIO RP2040 is a fantastic little dev board, featuring the RP2040 MCU.I needed a buffered ...
-
Voltage Controlled Stereo Panner This is a modular synthesizer stereo panner for audio or control voltages.This is a modular project ...
-
Dual Concentric Pots to 4x JST XH 3 pin males Needed an easy way to add dual concentric pots to my project. The PCB featured here accommodates 2 c...
-
AS3364 Linear Quad VCA Experimenter's Board The AS3364 is a low cost, easy-to-use quad linear VCA--4 high quality voltage controlled amplifiers ...
-
Dual SOIC 2164 VCA Dual SSM 2164 VCA-SOIC versionA classic dual audio VCA design, details in the blog post:https://audi...
-
Dual SSM 2164 VCA-THT version A classic dual audio VCA design, details in the blog post here:https://audiodiwhy.blogspot.com/2025/...
-
3.5mm 4 jack PCB I needed a simple PCB for 3.5mm jacks, I like switchcraft's 35RAP series connectors for audio projec...
-
Moog T403B Inspired High Pass Filter Clone of Moog High Pass filter based on EFM design.Please see the blog post here for more informatio...
-
LFO2 From "Electronics For Musicians" Analog LFO with variable frequency and lots of modulation options based on an EFM ("Electronics for ...
-
JTAG to SWD Converter Simple JTAG to SWD adapter.My use case is Segger J-LINK EDU MINI to Raspberry Pi Pico but this board...
-
Rotary Encoder Experimenter's Dev Board UPDATE: new revision 9-29-24 posted. Lower parts count, more reliable software debouncing for the en...
-
Bench 4x2 Bluetooth Mixer Simple 14HP Eurorack 4x2 synth mixer.outputs are 2x 100mil terminal posts on rear of PCB.You will ne...
-
Anything to Clock--LM311 based I needed a simple circuit to condition incoming signals so a MCU could read them as clock:--rectify ...
-
Vactrol Based Audio Envelope Follower An audio envelope follower based on a 5C3 Vactrol. Useful for auto-wah (send its output to a bandpas...
-
-
Commodore 64 1541-II 1581 Floppy Disk Drive C64 Power Supply Unit USB-C 5V 12V DIN connector 5.25
279 1 3 -
Easy to print simple stacking organizer with drawers
106 0 0 -
-
-
-
-
-
-
Modifying a Hotplate to a Reflow Solder Station
1195 1 6 -
MPL3115A2 Barometric Pressure, Altitude, and Temperature Sensor
680 0 1 -