Embedded systems engineer of the sharpie resist era. If you're in Shenzhen, don't bother making your own... you can even get prototype flex PCBs in a couple of

Embedded systems engineer of the sharpie resist era. If you're in Shenzhen, don't bother making your own... you can even get prototype flex PCBs in a couple of hours. The chemicals, heater, tank, maintenance and disposal are a PITA. It's fine once or twice, but generally it's not scalable.