CNC machine shop. I rigged a Sherline mill and lathe with stepper motors, limit switches, electronic touch-off and emergency stop button. I multiplexed the limi

CNC machine shop. I rigged a Sherline mill and lathe with stepper motors, limit switches, electronic touch-off and emergency stop button. I multiplexed the limit switches with a custom designed PCB with Schmitt triggers and an Arduino. I hooked this all up to a stepper motor controller board and power supply, and I placed all that into a custom built enclosure. I connected the controller board to a PC using PCIe parallel port cards. The PC runs LinuxCNC. This lets me machine alumninum into parts modelled in 3D CAD. Then I've machines various tools needed around the shop. I've also made a Turner's cube using the lathe, and again using the mill. I've also built a custom PS3 style controllers for manhually controlling the CNC machines. This was again done with custom PCBs, joystick and encoder parts, and Arduino. I'm working towards machining a Stirling engine with my CNC machines. I've also been working on and off on a robotic arm (which is what got me into machining metal parts in the first place). Unrelated to CNC machining, I've done a small, beginner SDR project: ADS-B receiver built with R820T2 USB SDR and custom built antenna from coax cable and PVC pipes, lets me to track commercial aircraft that frequently fly over my house.