Bob
About the Bob PCB
Bob is an open source PCB design by orbcode, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 30.7 × 43.2 mm, with 51 components from 18 distinct parts.
Other key parts include the 74LVCH8T245 and SN74LVC2T45DCUR. By type, the board carries 21 resistors, 12 capacitors, 5 connectors, 5 inductors, 3 ICs and 3 transistors.
From the project
Orbtrace & supporting hardware circuit diagrams etc.
This is the repository for various hardware for the ORBTrace project. There are various bits and pieces here but the most important ones are;
ORBTrace Mini V1.0 ORBMule demo board * Breakout board for PMOD
You can also find the openSCAD source materials, and vinyl graphics, for the ORBTrace Mini V1 case.
These materials are provided in open form to learn from and improve on. We have deliberately chosen to not provide Gerbers for ORBTrace mini or STLs for the caseworks since your manufacturing processes are likely different to ours. Drop a note if you need those.
Main components on the Bob
Bob bill of materials (BOM)
51 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LVCH8T245 | TSSOP-24_4.4x7.8mm_P0.65mm | U1 |
| 2 | SN74LVC2T45DCUR | VSSOP-8_2.4x2.1mm_P0.5mm | U2, U3 |
| 2 | Si2301CDS | SOT-23 | Q1, Q2 |
| 1 | DMG1012UW | SOT-323_SC-70 | Q3 |
| 1 | DEBUG+TRACE HEADER | PinHeader_2x10_P1.27mm_Vertical_SMD | J1 |
| 1 | DEBUG HEADER | PinHeader_2x05_P1.27mm_Vertical_SMD | J2 |
| 1 | SERIAL HEADER | PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | DISCO HEADER | PinHeader_1x06_P2.54mm_Vertical | J4 |
| 1 | PMOD2 | pmod_pin_array_6x2 | J6 |
| 2 | LED | LED_0603_1608Metric | D1, D2 |
| 5 | CBG160808U301T | L_0603_1608Metric | L1, L2, L3, L4, L5 |
| 4 | 10uF | C_0603_1608Metric | C1, C3, C11, C12 |
| 2 | 10nF | C_0603_1608Metric | C2, C4 |
| 6 | 100nF | C_0603_1608Metric | C5, C6, C7, C8, C9, C10 |
| 2 | 1K | R_0603_1608Metric | R1, R4 |
| 3 | 10K | R_0603_1608Metric | R2, R17, R19 |
| 15 | 100R | R_0603_1608Metric | R3, R5, R6, R7, R8, R9, R10, R11 +7 |
| 1 | 100K | R_0603_1608Metric | R21 |
Bob design files
The KiCad project lives in the orbcode/orbtrace_hw repository on GitHub; these links point at the commit this page was built from.
- Layouthw/bob/bob.kicad_pcb
Bob: common questions
How big is the Bob PCB?
The Bob measures 30.7 × 43.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Bob?
51 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the Bob design files?
From the orbcode/orbtrace_hw repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Bob design in my own project?
Yes, under the terms of its BSD-3-Clause license, which orbcode chose for the repository.
