The price of an agricultural electronics PCB copy is driven by five things: layer count, board size, component count, whether the assembly is conformal-coated or potted, and which deliverables you actually need. Lead time follows the same list. A two-layer solenoid driver card from a sprayer boom is a short job. A four-layer CAN controller buried under thick urethane, with a locked MCU holding calibration data, is a different conversation.
This page is written for the person who has a dead or discontinued farm controller on the bench and needs a number and a date, not a definition. If you are collecting quotes for a purchasing file, the same information tells you which quotes to distrust.
What actually moves the price on an Agricultural Electronics PCB Copy
Agricultural boards are unusual. Electrically they are simple compared to a phone motherboard, but physically they get abused in ways lab boards never do: vibration on a planter frame, temperature swings from a −30 °C shed to a black cab in July, ammonia in livestock housing, high-pressure wash-down, dust, and 12/24 V systems with load-dump transients. Those realities show up directly in the quote.
- Layer count. Most ag controllers are two or four layers on standard FR-4. Two-layer boards can be traced optically from both sides. Four layers and up need controlled layer separation, which means removing outer copper and dielectric in stages to image the inner planes. More labor, and the sample is consumed.
- Conformal coating. Almost every board that lives outside a sealed cab carries acrylic or urethane coating. It has to come off cleanly before anything can be probed or scanned. Thick urethane takes real time and risks lifting silkscreen or tombstoning small passives.
- Potting. Wheel-speed sensor heads, GPS receiver modules, and some ISOBUS junction blocks are potted in epoxy or silicone. De-potting is slow, sometimes destructive, and always the largest single unknown in a quote.
- Component count and mix. A rate controller with 300 parts, four relays, a display connector, and eight discrete solenoid drivers takes longer to identify and net out than a 60-part sensor interface.
- Damage. Boards arrive corroded, with cracked joints around heavy connectors, or with a blown FET that took the trace with it. Missing copper has to be reconstructed by inference from the surrounding circuit. That is engineering judgment, not scanning, and it is slower.
- Deliverables. Gerber and drill data for refabrication is the cheapest tier. Add a full schematic, a verified BOM, a netlist, and a pick-and-place file and the price climbs, because each is a separate verification pass.
Two boards with the same outline can differ by a factor of several for these reasons. That is why we quote from photos and a short description rather than from a rate card.
How long each class of agricultural board takes
Absolute times depend on your board and on what else is in the queue, but the relative ranking is stable. Use it to sanity-check whatever schedule you are given, by us or by anyone else.
| Board type | Typical build | What sets the schedule |
|---|---|---|
| Solenoid / valve driver card (sprayer boom, planter clutch) | 2 layers, heavy copper, through-hole power parts | Fastest class. Coating removal and current-carrying trace width verification are most of the work. |
| Cab display / monitor board | 4 layers, LCD connector, backlight driver | Layer separation plus confirming the display interface pinout against a datasheet. |
| CAN / ISOBUS rate controller | 4–6 layers, MCU, transceiver, EEPROM | Inner-layer imaging, plus firmware questions if the controller stores calibration. |
| Grain moisture / weigh-cell interface | 2–4 layers, precision analog front end | Sanded or house-marked analog parts need bench characterization, which adds days. |
| Potted sensor head or GPS module | Small, dense, epoxy-filled | Slowest and least predictable. The de-potting result decides whether the job proceeds at all. |
| Livestock climate / feed system controller | 2 layers, relays, mains section | Corrosion cleanup, plus creepage and clearance checks on the mains side against IPC-2221 spacing guidance. |
Firmware work runs in parallel with board work rather than after it, so a combined job is usually shorter than the two done separately. If you need both, say so at quote time — it changes how we schedule the sample.
What we physically do with your board
Intake and documentation
The board is photographed as received, both sides, with connector labels, date codes and revision markings captured before anything is touched. If it came out of a machine that is still running somewhere else, we record the harness pinout and any DIP switch or jumper positions while that information is still visible. Then it gets cleaned. Flux residue, field dirt and fertilizer dust all scatter light and corrupt a scan.
Coating and de-population
Coating comes off in stages, with checks under magnification that pads and 0402 passives survived. Components are removed in a documented order, measured, and bagged by reference designator. Every part marking is read and cross-checked against a datasheet; house-marked or laser-sanded parts are flagged for electrical characterization rather than guessed at. On ag boards the usual suspects are the flyback controller in the 12 V supply, the CAN transceiver, and an unmarked op-amp in the sensor front end.
Scanning, layer separation, and netlist build
Bare copper is scanned at high resolution against a flat reference. On a four-layer controller the outer layers are imaged first, then removed in controlled passes so the inner power and ground planes can be imaged separately. Vias are correlated between layers, drill sizes are measured rather than assumed, and the stack-up thickness is measured so impedance-sensitive nets — CAN, RS-485, an LVDS display link — can be reproduced with the same dielectric spacing.
The netlist is then built from the layer images and checked electrically on the stripped board wherever nets are still accessible. Continuity checks catch the two errors that matter most: a via connection the imaging missed, and a plane stitch that looks like a break because the copper was etched thin by corrosion.
Schematic capture and verification
If you ordered a schematic, the netlist is turned into readable sheets organized by function — power input and reverse-battery protection, MCU and reset, CA
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