SoftSwitch
About the SoftSwitch PCB
SoftSwitch is an open source PCB design by btb, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 30.5 × 48.3 mm, with 17 components from 15 distinct parts.
By type, the board carries 6 resistors, 4 connectors, 2 transistors, 2 diodes and 1 fuse.
From the project
An Apple II 80-Column Card. Based on the Videx Videoterm
SoftSwitch bill of materials (BOM)
17 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 3904 | TO-92 | Q1 |
| 1 | 3906 | TO-92 | Q2 |
| 1 | 80 COL IN | SolderWire-0.1sqmm_1x02_P3.6mm_D0.4mm_OD1mm_Relief | J1 |
| 1 | 40 COL IN | SolderWire-0.1sqmm_1x03_P3.6mm_D0.4mm_OD1mm_Relief | J2 |
| 1 | VIDEO OUT | PinHeader_1x06_P2.54mm_Horizontal | J3 |
| 1 | 40 COL OUT | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | 74LS259/9334 | DIP-16_W7.62mm_Socket | F14 |
| 1 | F14 passthrough | DIP-16_W7.62mm_Socket | FP14 |
| 1 | 200 | Multi_Potentiometer_6mm_Vertical | RV1 |
| 2 | 1N 914 | D_DO-35_SOD27_P10.16mm_Horizontal | D1, D2 |
| 1 | 200 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 2 | 2K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 5.1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 28 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
SoftSwitch design files
The KiCad project lives in the btb/80ColumnCard repository on GitHub; these links point at the commit this page was built from.
SoftSwitch: common questions
How big is the SoftSwitch PCB?
The SoftSwitch measures 30.5 × 48.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SoftSwitch?
17 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the SoftSwitch design files?
From the btb/80ColumnCard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SoftSwitch design in my own project?
Yes, under the terms of its Apache-2.0 license, which btb chose for the repository.
