02 loop env
About the 02 loop env PCB
02 loop env is an open source PCB design by bmurauer, published on GitHub. It is a 2-layer board measuring 30 × 100 mm, with 53 components from 25 distinct parts.
Other key parts include the TL074 and TL072. By type, the board carries 18 resistors, 10 diodes, 9 capacitors, 4 transistors, 4 switches and 3 connectors.
It belongs with the audio designs in this gallery.
From the project
Plans for my modular synthesizer
Fill in the "Design" columns before building; fill in the "As-Built" columns after assembly and bench testing.
Main components on the 02 loop env
02 loop env bill of materials (BOM)
53 components, 25 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL074 | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 2 | BC857 | SOT-23 | Q1, Q3 |
| 2 | BC847 | SOT-23 | Q2, Q4 |
| 1 | gate in 1 | 3.5mm jack mono switched | J1 |
| 1 | End of Cycle Out | 3.5mm jack mono switched | J2 |
| 1 | env out 1 | 3.5mm jack mono switched | J3 |
| 1 | Eurorack 10 pin header | Eurorack Header | H1 |
| 2 | 1M | potientiometer | RV1, RV2 |
| 1 | Manual Gate | push button | SW1 |
| 1 | Gate/Loop | switch_spdt | SW2 |
| 1 | ~ | switch_dpdt | SW3 |
| 1 | Normal/Inverted | switch_spdt | SW4 |
| 6 | 1N4148WS | D_SOD-323_HandSoldering | D1, D4, D5, D6, D7, D8 |
| 2 | SS14 | D_SMA | D2, D3 |
| 2 | LED | LED_D5.0mm | D9, D10 |
| 2 | 22uF | CP_Radial_D6.3mm_P2.50mm | C1, C2 |
| 6 | 100nF | C SMD 0805 | C3, C4, C5, C6, C7, C8 |
| 1 | 1uF | C_Rect_L7.0mm_W6.5mm_P5.00mm | C9 |
| 9 | 100k | R SMD 0805 | R1, R2, R3, R4, R5, R6, R8, R15 +1 |
Show 5 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 22k | R SMD 0805 | R7, R12 |
| 4 | 1k | R SMD 0805 | R9, R10, R17, R18 |
| 1 | 10k | R SMD 0805 | R11 |
| 1 | 33k | R SMD 0805 | R13 |
| 1 | 8.2k | R SMD 0805 | R14 |
02 loop env design files
The KiCad project lives in the bmurauer/cynthia repository on GitHub; these links point at the commit this page was built from.
02 loop env: common questions
How big is the 02 loop env PCB?
The 02 loop env measures 30 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 02 loop env?
53 components, from 25 distinct parts. The full bill of materials is listed on this page.
Where can I download the 02 loop env design files?
From the bmurauer/cynthia repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 02 loop env design in my own project?
The repository has no license, so all rights stay with bmurauer. Use it as a reference, and ask the author before reusing the design.
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