2 layers130 × 80 mm
2 layers61.5 × 28.3 mm
Vr circuit
ZHoob2004/vr_conditionerIn hingsight, this was a poor choice of chip, and this didn't work - see mck1117/vr-interface for working design
- Size
- 61.5 × 28.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 72
- Nets
- 31
- Pads
- 166
- Tracks, vias
- 223, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 6 Jan 2019
- Updated
- 25 Oct 2021
Overview
Vr circuit is an open-source printed circuit board by ZHoob2004, from the ZHoob2004/vr_conditioner repository on GitHub. It is a 2-layer board of 61.5 × 28.3 mm with 72 parts on 31 nets, routed with 223 tracks and 0 vias.
It is built around the LM393 and BAV99. Its parts include 34 resistors, 23 capacitors, 8 diodes, 5 connectors and 2 ICs.
Main components
2README
readme.mdvr_conditioner
In hingsight, this was a poor choice of chip, and this didn't work - see mck1117/vr-interface for working design
VR conditioner board for Honda OBD0, OBD1, and early OBD2 VR sensors
Based (heavily) on https://rusefi.com/forum/viewtopic.php?f=3&t=1115&p=20857&hilit=honda#p20862
Rerouted as 2-layer board and reduced PCB area by more than 50%.
Parts
72| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10K | Resistors_SMD:R_0805_HandSoldering | R1, R7, R10, R22, R30 |
| 5 | 10nF | Capacitors_SMD:C_0805_HandSoldering | C1, C6, C7, C8, C9 |
| 4 | 100K | Resistors_SMD:R_0805_HandSoldering | R19, R23, R27, R31 |
| 4 | 10K | Resistors_SMD:R_2512_HandSoldering | R8, R17, R25, R33 |
| 4 | 1K | Resistors_SMD:R_0805_HandSoldering | R3, R12, R20, R28 |
| 4 | 1nF | Capacitors_SMD:C_0805_HandSoldering | C4, C12, C17, C22 |
| 4 | 220 | Resistors_SMD:R_0805_HandSoldering | R6, R15, R24, R32 |
| 4 | 470pF | Capacitors_SMD:C_0805_HandSoldering | C3, C11, C16, C21 |
| 4 | BAV99 | TO_SOT_Packages_SMD:SOT-23_Handsoldering | D1, D3, D5, D7 |
| 4 | D_Small | Diodes_SMD:SOD-523 | D2, D4, D6, D8 |
| 3 | 4.7nF | Capacitors_SMD:C_0805_HandSoldering | C2, C15, C20 |
| 2 | 15nF | Capacitors_SMD:C_0805_HandSoldering | C14, C19 |
| 2 | 160K | Resistors_SMD:R_0805_HandSoldering | R26, R34 |
| 2 | 22nF | Capacitors_SMD:C_1206_HandSoldering | C18, C23 |
| 2 | 470K | Resistors_SMD:R_0805_HandSoldering | R9, R14 |
| 2 | 5.6K | Resistors_SMD:R_0805_HandSoldering | R21, R29 |
| 2 | LM393 | SMD_Packages:SOIC-8-N | U1, U2 |
| 1 | 100nF | Capacitors_SMD:C_1206_HandSoldering | C5 |
| 1 | 120K | Resistors_SMD:R_0805_HandSoldering | R5 |
| 1 | 2.2nF | Capacitors_SMD:C_0805_HandSoldering | C10 |
| 1 | 2.4K | Resistors_SMD:R_0805_HandSoldering | R4 |
| 1 | 2K | Resistors_SMD:R_0805_HandSoldering | R13 |
| 1 | 33nF | Capacitors_SMD:C_1206_HandSoldering | C13 |
| 1 | 47K | Resistors_SMD:R_0805_HandSoldering | R2 |
| 1 | 56K | Resistors_SMD:R_0805_HandSoldering | R18 |
| 1 | 91K | Resistors_SMD:R_0805_HandSoldering | R11 |
| 1 | CKF | Pin_Headers:Pin_Header_Straight_1x02 | P4 |
| 1 | CKP | Pin_Headers:Pin_Header_Straight_1x02 | P3 |
| 1 | CYP | Pin_Headers:Pin_Header_Straight_1x02 | P2 |
| 1 | DNP | Resistors_SMD:R_0805_HandSoldering | R16 |
| 1 | IO | Pin_Headers:Pin_Header_Straight_1x08 | P5 |
| 1 | TDC | Pin_Headers:Pin_Header_Straight_1x02 | P1 |
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Questions
How big is the Vr circuit PCB?
It measures 61.5 × 28.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Vr circuit use?
72 parts, built around the LM393 and BAV99. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Vr circuit KiCad files?
From the ZHoob2004/vr_conditioner repository on GitHub, at the commit this page was made from: the board is vr_circuit.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Vr circuit design in my own project?
Its repository states no licence, so its author keeps all rights: ask ZHoob2004 before reusing the design.