JLR-MOST-Reader
About the JLR-MOST-Reader PCB
JLR-MOST-Reader is an open source PCB design by Oleg-mk, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 84.9 × 26.5 mm, with 56 components from 34 distinct parts.
Other key parts include the 74LVC1G34, 74LVC1G125, 74LVC1G123, TPS7B8133DRV and LMR38020F. By type, the board carries 27 capacitors, 12 resistors, 5 ICs, 4 inductors, 3 connectors and 3 diodes.
From the project
Listen-only MOST25 adapter for JLR: the factory stereo out over TOSLINK, the car's own volume controls applied digitally with no quality loss
v2.0 is v1.0's electronics, plus two series resistors (R43, R44, below) and a smaller C45, on a board that slides into a square aluminium tube with two end caps: a 30x30x1.5 tube (27.0 inside), a board 26.5 mm wide, the module's own USB-C in the far end cap with no extension cable. v1.0 (readerhw`) is not touched.
genreader2.py does not draw the circuit again: it loads readerhw/genreader.py and writes its blocks 1-7 into this folder, under the project name mostreaderv2` with its own UUIDs. It changes what describes the board and adds two resistors:
Main components on the JLR-MOST-Reader
JLR-MOST-Reader bill of materials (BOM)
56 components, 34 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LVC1G34 | SOT-353_SC-70-5 | U1 |
| 1 | 74LVC1G125 | SOT-353_SC-70-5 | U3 |
| 1 | 74LVC1G123 | VSSOP-8_2.3x2mm_P0.5mm | U4 |
| 1 | TPS7B8133DRV | WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U5 |
| 1 | LMR38020F | Texas_HSOP-8-1EP_3.9x4.9mm_P1.27mm_ThermalVias | U6 |
| 1 | Tang Nano 20K | Sipeed_TangNano20K | M1 |
| 1 | 1-1394640-1 | TE_MOST_Pigtail_FOT_2+0 | J1 |
| 1 | VBAT_IN | Molex_Micro-Fit_3.0_43650-0200_1x02_P3.00mm_Horizontal | J4 |
| 1 | PLT237/T10WH | Everlight_TOSLINK_T10 | J6 |
| 1 | C2925010 2A T | Fuse_1206_3216Metric | F1 |
| 2 | SS34 | D_SMA | D1, D3 |
| 1 | SMBJ36A | D_SMB | D2 |
| 2 | 600R | L_0603_1608Metric | FB1, FB2 |
| 1 | 15U 15u | L_Bourns_SRN6045TA | L1 |
| 1 | 22U 22u | L_Bourns-SRN8040_8x8.15mm | L2 |
| 1 | C576517 10u 100V | C_1210_3225Metric | C1 |
| 7 | C15725 100n 100V | C_0603_1608Metric | C2, C43, C46, C47, C82, C83, C84 |
| 1 | 2U2 2u2 | C_0603_1608Metric | C3 |
| 1 | C385986 4u7 100V | C_1210_3225Metric | C4 |
| 9 | 100N 100n | C_0603_1608Metric | C6, C8, C10, C12, C17, C19, C31, C64 +1 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C77101 47u 10V | C_1210_3225Metric | C7 |
| 1 | 1u | C_0603_1608Metric | C9 |
| 2 | 10U 10u | C_0805_2012Metric | C18, C20 |
| 1 | 1u | C_0805_2012Metric | C32 |
| 1 | C53330124 100u 63V | CP_Elec_10x10.5 | C44 |
| 1 | C165628 47u 63V | CP_Elec_8x10 | C45 |
| 1 | C359220 100u 16V | CP_Elec_6.3x7.7 | C63 |
| 2 | 150 | R_0603_1608Metric | R1, R2 |
| 2 | 27K 27k | R_0603_1608Metric | R3, R42 |
| 3 | 100K 100k | R_0603_1608Metric | R4, R6, R7 |
| 1 | 23K2 23k2 | R_0603_1608Metric | R5 |
| 2 | 33 | R_0603_1608Metric | R28, R43 |
| 1 | C14891 64k9 1% | R_0603_1608Metric | R31 |
| 1 | 68 | R_0603_1608Metric | R44 |
JLR-MOST-Reader design files
The KiCad project lives in the Oleg-mk/JLR-MOST-Reader repository on GitHub; these links point at the commit this page was built from.
JLR-MOST-Reader: common questions
How big is the JLR-MOST-Reader PCB?
The JLR-MOST-Reader measures 84.9 × 26.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the JLR-MOST-Reader?
56 components, from 34 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 JLR-MOST-Reader design files?
From the Oleg-mk/JLR-MOST-Reader 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 JLR-MOST-Reader design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which Oleg-mk chose for the repository.
Earlier revisions in the repo: most_reader