A Dropcam will run you about $150. Price out a Raspberry Pi, camera sensor, and a CCTV camera housing found on eBay, and it starts to look like there may be a cheaper replacement for a Dropcam ...

That’s a big deal for the Raspberry Pi ecosystem. Most cameras out there today use CMOS sensors in rolling shutter mode. That means that the sensor starts ... one frame will be dark and another ...