How Hardware Startups Use Selective Soldering for Mixed Tech

Most people think soldering is just soldering — but for hardware startups building devices that combine through-hole and surface-mount components on the same board, selective soldering is a game-changer. In this episode, Lucas and Luna walk through a real case: a startup making industrial sensors that needed to manually solder a high-power connector onto an otherwise automated SMT board. They break down why wave soldering would have destroyed nearby delicate parts, how a small benchtop selective soldering machine solved it for under $15,000, and why this technique is becoming essential for low-volume mixed-technology prototypes. Lucas shares the specific thermal profile tweak that prevented tombstoning on adjacent components. Luna asks the hard question: when does selective soldering stop making sense versus hand soldering or redesigning the board? They also touch on how contract manufacturers are now offering selective soldering as a standard service, even for runs under 500 units. If you're building hardware that combines power electronics with digital logic on one PCB, this episode will save you from a common rework nightmare. #HardwareStartups #SelectiveSoldering #PCBAssembly #ThroughHole #SurfaceMount #ManufacturingTech #ElectronicsManufacturing #Prototyping #IndustrialSensors #SMT #WaveSoldering #ThermalProfile #Tombstoning #ContractManufacturing #LowVolumeProduction #Business #Technology #FexingoBusiness Keep every episode free: buymeacoffee.com/fexingo