We foresaw your answer in our Crystal Ball.
Digital Encoders for angle measuring
RFID technology , market and applications
Identifying and applying coax connectors - there seem to be a million speciality types now
I would like to see some modules on RC electronics like electronic speed controllers, battery eliminator circuits, radio transmitters, using IoT communication to remotely control machines, programming microcontrollers to manage motor drives, pulse width modulation, etc.