RayPCB
PCB manufacturer and PCB assembly
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Latest posts
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Water leak detector PCB electrodes: Plan Corrosion, Contamination and False Alarm Tests
A water leak detector can work perfectly with a wet finger on a bench and still miss a real leak under an appliance. The liquid may be less conductive, the enclosure may keep it away from the electrodes, or dried contamination may leave the board permanently reporting wet.…
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LED thermal pad solder void review: Define the Measurement and Acceptance Agreement
A percentage on an X-ray report is not a complete acceptance decision. An LED thermal-pad solder void review must identify the package, the inspected area, the image-analysis method and the product conditions that make the joint acceptable. Otherwise a supplier can measure…
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USB 2.0 test fixture layout: Preserve Signal Paths Between the DUT and Connector
A USB fixture is part of the circuit you measure. Its connector launches, copper, probes and ground connections can change the waveform before the oscilloscope records it. A useful USB 2.0 test fixture therefore starts with a defined measurement task, not a collection of…
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Camera sensor board power noise: Separate Analog, Digital and Autofocus Loads
Camera sensor board power noise is a system problem: regulator behavior, distribution impedance, sensor operating mode and nearby loads can all contribute. Replacing a regulator without identifying the coupling path may leave the image unchanged. A useful investigation connects…
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HVAC Controller Relay Isolation: Ratings, Spacing and Review
HVAC controller relay isolation is a system-boundary decision. Identify what each contact switches, which circuits are accessible, and what insulation function is required before selecting a relay footprint. A contact current rating, a coil-to-contact dielectric test and a PCB…
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Edge AI Accelerator Thermal Interface: PCB, Spreader and Enclosure
An edge AI thermal interface is a mechanical, thermal and production design problem. A high conductivity number cannot compensate for the wrong gap, uneven contact or an enclosure that cannot reject the heat. Start with the accelerator’s permitted cooling surface, define the…
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USB PD Controller Power Sequencing: Attach, Detach and Fault Review
A USB PD power sequence is a state transition, not just a list of rail delays. Review what powers the controller before attachment, which path may conduct after attachment, when the system may consume the negotiated power, and how the board returns to a safe state after detach…
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Boost Converter PCB Diode Loop: Layout and Ripple Measurement
In a conventional non-isolated boost converter, review the compact switching loop formed by the rectifier, high-frequency output capacitor and power switch return. Draw both switching states before routing. Then measure output ripple at a defined location with a controlled probe…
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Motor Driver Shunt Placement: Kelvin Routing and PWM Sampling
Place the shunt in the current path you actually need to measure, then route two dedicated sense connections from its specified sensing points to the amplifier. A short power path and a clean measurement path are separate layout requirements. Check both, and define when the ADC…
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RTD Transmitter PCB Layout: Lead Resistance, Excitation and Thermal Error
An RTD transmitter PCB should preserve a known measurement circuit, not merely place an ADC close to a terminal block. Separate lead resistance, excitation, reference accuracy and thermal effects before routing. Then use dedicated bench experiments to find out which error source…