If I attach sensors of whatever kind to a bunch of toasters, I can use the sensor output to do whatver I want. So it goes from mind controlled toasters to mind contolled anything, really.
Suppose I can control the temperature on toasters. Attach heat sensors on four toasters and interpret the heat level as up/down/left/right. Pass that to a drone and I have a mind controlled drone :P
If I attach sensors of whatever kind to a bunch of toasters, I can use the sensor output to do whatver I want. So it goes from mind controlled toasters to mind contolled anything, really.
Suppose I can control the temperature on toasters. Attach heat sensors on four toasters and interpret the heat level as up/down/left/right. Pass that to a drone and I have a mind controlled drone :P
Or you could use an ECG for probably similar accuracy.