Binocular eyepiece head and joystick: what they have in common

1. Step 1. Binocular eyepiece head — is part of — Operating microscope. Eyepieces for the surgeon.
2. Step 2. Operating microscope — has part — LED. An illuminator.
3. Step 3. LED — is part of — Remote control. An infrared LED.
4. Step 4. Remote control — has part — Microcontroller. A microcontroller sends the codes.
5. Step 5. Microcontroller — is part of — Gamepad. A microcontroller polls the buttons.
6. Step 6. Gamepad — evolved from — Joystick. A game controller.

Open Evothings