WBO2
About the WBO2 PCB
WBO2 is an open source AVR/Arduino PCB design by rusefi, published on GitHub. It is a board measuring 67.4 × 40.6 mm, with 51 components from 36 distinct parts.
Its main chip is the ATMEGA8-P, from the AVR/Arduino family. Other key parts include the 7805 and LM324. By type, the board carries 27 resistors, 10 capacitors, 4 connectors, 3 ICs, 2 relays and 1 transistor.
From the project
In this repo we archive rusEfi-related abandoned hardware files
Based on WBO2 1.1 from waltech.com - the source files were officially donated by Karl Walter
Main components on the WBO2
WBO2 bill of materials (BOM)
51 components, 36 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATMEGA8-P | DIP-28__300_ELL | IC1 |
| 1 | 7805 | TO220_VERT-reg | U2 |
| 1 | LM324 | SO14N | U4 |
| 1 | FDS2734 MOS_N | TO220GDS | Q1 |
| 1 | 8mhz | HC-18UV-short | X1 |
| 1 | CONN_4 | PIN_ARRAY_4x1 | P1 |
| 3 | CONN_2 | mors_2p | P2, P6, P7 |
| 1 | FUSE | FUSE5-20 | F1 |
| 2 | CONN_3 | mors_3p | K1, K2 |
| 1 | DIODE-SOT | SOT23 | D3 |
| 1 | 10mh | SM1206 | L1 |
| 1 | 1000PF 10uf | SM1206 | C1 |
| 1 | 0.033UF 1uf | SM0805 | C2 |
| 1 | 0.1UF 22p | SM0805 | C3 |
| 1 | 0.1UF 229 | SM0805 | C4 |
| 1 | 220PF .1 | SM0805 | C5 |
| 1 | 0.033UF .1 | SM0805 | C6 |
| 1 | 0.1UF 1uf | SM0805 | C7 |
| 1 | 10uf | SM1206 | C13 |
| 1 | .1uf | SM0805 | C14 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1uf | SM0805 | C15 |
| 1 | 10K 100 | SM0805 | R1 |
| 1 | 21K6 1.8k | SM0805 | R2 |
| 1 | 160 18k | SM0805 | R3 |
| 1 | 61.9 10k | SM0805 | R4 |
| 1 | 10K 10k | SM0805 | R7 |
| 8 | 10k | SM0805 | R8, R18, R19, R20, R21, R22, R23, R29 |
| 1 | 82.5 1.8k | SM0805 | R9 |
| 1 | 117.5 6.8k | SM0805 | R10 |
| 1 | 100K 62ohm | SM0805 | R12 |
| 1 | 100K 22k | SM0805 | R13 |
| 1 | 470K 22k | SM0805 | R14 |
| 1 | 12k | SM0805 | R15 |
| 1 | 10K 12k | SM0805 | R16 |
| 2 | 100k | SM0805 | R17, R30 |
| 5 | 5k | SM0805 | R24, R25, R26, R27, R28 |
WBO2 design files
The KiCad project lives in the rusefi/hw_legacy repository on GitHub; these links point at the commit this page was built from.
WBO2: common questions
What microcontroller does the WBO2 use?
The WBO2 is built around the ATMEGA8-P, from the AVR/Arduino family.
How big is the WBO2 PCB?
The WBO2 measures 67.4 × 40.6 mm and is 1.6 mm thick.
How many components are on the WBO2?
51 components, from 36 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 WBO2 design files?
From the rusefi/hw_legacy repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the WBO2 design in my own project?
The repository has no license, so all rights stay with rusefi. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the WBO2 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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