DB25 External
About the DB25 External PCB
DB25 External is an open source PCB design by daniel-ayers, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 72.2 × 57.7 mm, with 85 components from 24 distinct parts.
Other key parts include the C7155, C14791, C74214, C7042 and C5605. By type, the board carries 53 resistors, 14 capacitors, 9 ICs, 3 diodes, 2 connectors and 1 fuse.
From the project
Snapshot of BlueSCSI/BlueSCSI-v2 for evidential purposes. Not updated.
Main components on the DB25 External
DB25 External bill of materials (BOM)
85 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | C7155 SN74CBTD3384 | TSSOP-24_4.4x7.8mm_P0.65mm | U1, U2 |
| 1 | C14791 AMS1117-2.85 | SOT-223-3_TabPin2 | U3 |
| 2 | C74214 LVT245 | TSSOP-20_4.4x6.5mm_P0.65mm | U4, U9 |
| 3 | C7042 LVT125 | TSSOP-14_4.4x5mm_P0.65mm | U5, U6, U7 |
| 1 | C5605 74HC14 | SOIC-14_3.9x8.7mm_P1.27mm | U8 |
| 1 | Conn_01x03_Male | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | SW | PinHeader_2x02_P2.54mm_Vertical | J4 |
| 1 | C883111 Polyfuse | Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F2 |
| 1 | Pico_Footprint | BluePillModule | RP1 |
| 1 | C693844 MicroSD-TF-06 | TF-06_MicroSD | SD2 |
| 1 | C318884 SW_MEC_5E | TS-1187A-B-A-B | SW1 |
| 1 | C2480 D | D_SMA | D1 |
| 1 | C72041 LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
| 1 | C2290 LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3 |
| 2 | C28233 0.1uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2, C5 |
| 2 | C5672 20uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C3, C4 |
| 2 | C1779 4.7uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C6, C12 |
| 3 | C1779 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C10, C15 |
| 5 | C28233 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8, C9, C11, C13, C14 |
| 18 | C141676 R | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 +10 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 23 | C11702 1k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R11, R12, R13, R14, R15, R16, R17, R18 +15 |
| 7 | C21190 1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R23, R24, R25, R26, R27, R28, R29 |
| 1 | C25117 470 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R30 |
| 4 | C23162 4.7k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R31, R32, R41, R56 |
DB25 External design files
The KiCad project lives in the daniel-ayers/BlueSCSI-v2 repository on GitHub; these links point at the commit this page was built from.
DB25 External: common questions
How big is the DB25 External PCB?
The DB25 External measures 72.2 × 57.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DB25 External?
85 components, from 24 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the DB25 External design files?
From the daniel-ayers/BlueSCSI-v2 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the DB25 External design in my own project?
Yes, under the terms of its GPL-3.0 license, which daniel-ayers chose for the repository.
