1u lpg
About the 1u lpg PCB
1u lpg is an open source PCB design by coriolisinstruments, published on GitHub. It is a 2-layer board measuring 38 × 22 mm, with 6 components from 5 distinct parts.
Other key parts include the VTL5Cx2. By type, the board carries 2 capacitors, 1 IC and 1 diode.
It belongs with the audio designs in this gallery.
From the project
Open-source eurorack synthesizer modules and related stuff.
A simple passive low-pass gate with -6dB slope in a small 1U package.
This low-pass gate (LPG) module design was inspired by the Two Tone module from Ben Moren as well as Ken Stone's LPG. The original "Two Tone" LPG can be found here.. The filter is 2nd order RC filter (the LDRs in the vactrols being the R), so it has a filter slope of -6dB.
I made this into a single LPG in a small 1U module, because I figured it would be nice to have a couple of them handy in my utility row. Note that I've design them according to the Intellijel 1U specification.
Main components on the 1u lpg
1u lpg bill of materials (BOM)
6 components, 5 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | VTL5Cx2 | DIY_Optoisolator_VTL5Cx2 | U1 |
| 1 | 20K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R_LED_1 |
| 1 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R_VAC_1 |
| 1 | LED | LED_D3.0mm | D1 |
| 2 | 0.1uF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
1u lpg design files
The KiCad project lives in the coriolisinstruments/EurorackModules repository on GitHub; these links point at the commit this page was built from.
1u lpg: common questions
How big is the 1u lpg PCB?
The 1u lpg measures 38 × 22 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 1u lpg?
6 components, from 5 distinct parts. The full bill of materials is listed on this page.
Where can I download the 1u lpg design files?
From the coriolisinstruments/EurorackModules repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the 1u lpg design in my own project?
The repository has no license, so all rights stay with coriolisinstruments. Use it as a reference, and ask the author before reusing the design.
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