This is a scale Bell 206 collective head! It's made using photos with measurements, so should be really close to the real one. It's quite simple, but really has everything you need to fly helicopters (if used with the lever body with a physical throttle latch).

• 1 x MTS-103 - E1 switch
• 1 x KN3(B) SPDT on-off-on switch (12mm)
• 1 x PBS-10B2 button
• 3 x M3x40mm countersunk screws and nuts
• 1 x Arduino Pro Mini

simchair4_models\printable components\peripherals\helicopter\collective lever\c_switch panels\b206 collective head

• print small parts at the highest quality setting and 0,1mm layer height
• if you want the version of the panel with letters - print it at 0,1mm as well, adjust the number of layers on top to 5 or 6
• use a correction white marker to fill letters with white paint, and then carefully paint them over with a black permanent marker (it wont be filling letters!), then paint the rest of the panel with it for colors to match.

1. Prepare the top panel of choice and insert switches in it. Cut the top off the MTS-123-E1 plastic cap so the scale cap will fit onto it. You can use a black marker to paint the cap if its not black. Insert the PBS button into its socket, glue the decorative cover on top of it and then put the scale cap on.

2. Solder the GND wire to switches.

3. Solder an ISP header to Arduino Pro Mini board.

4. Solder a 5-wire cable to switches as follows:

LDG LTS SW BOTH SIDE→ PIN2 LDG LTS SW OFF SIDE → PIN3 GOV RPM INCR SIDE → PIN4 GOV RPM DECR SIDE → PIN5 STARTER BTN → PIN6

5. Solder a 7-wire cable to an Ethernet socket. Connect it as follows:

ETH PIN 1 ⇒ VCC ETH PIN 2 ⇒ GND ETH PIN 3 ⇒ SCL ETH PIN 4 ⇒ SDA ETH PIN 5 ⇒ Rx ETH PIN 6 ⇒ TX ETH PIN 7 ⇒ DTR