FirstPass
About the FirstPass PCB
FirstPass is an open source PCB design by sphawes, published on GitHub. It is a 2-layer board measuring 34.9 × 99.7 mm, with 20 components from 18 distinct parts.
Other key parts include the TL072 and CEM3340. By type, the board carries 9 resistors, 4 connectors, 2 ICs, 2 capacitors and 1 switch.
Main components on the FirstPass
FirstPass bill of materials (BOM)
20 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL072 | DIP-8_W7.62mm_Socket_LongPads | U1 |
| 1 | CEM3340 | DIP-16_W7.62mm_Socket_LongPads | U2 |
| 1 | CVJACK | Pin_Header_Straight_1x03_Pitch2.54mm | J1 |
| 1 | OUT | Pin_Header_Straight_1x03_Pitch2.54mm | J2 |
| 1 | +12v | BARREL_JACK | J3 |
| 1 | -12v | BARREL_JACK | J4 |
| 1 | TRIM | Pin_Header_Straight_1x03_Pitch2.54mm | RV1 |
| 1 | COARSE | Pin_Header_Straight_1x03_Pitch2.54mm | RV2 |
| 1 | SW_DPDT_x2 | Pin_Header_Straight_1x03_Pitch2.54mm | SW1 |
| 1 | 1nF | C_0805_HandSoldering | C1 |
| 1 | 10nF | C_0805_HandSoldering | C2 |
| 1 | 620 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 5.6K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 24K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 2 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R6 |
| 1 | 1.8K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 1.5M | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 2 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8, R9 |
FirstPass design files
The KiCad project lives in the sphawes/diySynth repository on GitHub; these links point at the commit this page was built from.
FirstPass: common questions
How big is the FirstPass PCB?
The FirstPass measures 34.9 × 99.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the FirstPass?
20 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the FirstPass design files?
From the sphawes/diySynth repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the FirstPass design in my own project?
The repository has no license, so all rights stay with sphawes. Use it as a reference, and ask the author before reusing the design.
