IMPORTANT! PLEASE USE LATEST FILES FROM GITHUB:

https://github.com/hc625ma/simchair_models/tree/master/Components/Peripherals

Visit http://hc625ma.org for latest news and manuals!

Summary

This is the AB412-style collective lever head. It’s not 100% scale, but is close enough and has quite a lot of stuff in it: two Arduino Pro Minis onboard, two hat switches, seven 3-way switches and three buttons on the top panel, and optionally up to two rotary pots on its sides, along with a mode switch. It also has some interesting software-driven features:

-- four switch modes to cover all your needs
-- you can choose which switches to use: toggle 3-way switches of spring-loaded ones in any combination
-- DCS UH-1 idle stop compatibility mode – this thing can realistically start and stop the Huey, although it doesn’t support advancing throttle past idle-stop detent with a joystick axis
-- X-Plane X-Trident AB412 idle stop compatibility mode (with an external Lua script)
-- mode switch triples your buttons and spring-loaded switches number

Components

You will need:

2 x Arduino pro mini board
2 x KY-023 joystick module
1 x USBtoCOM adapter (e.g., PL2303) or another Arduino to program it
1 x PBS-10B-2 button
1 x KN3(B)-103A-A3 switch (starter, in a real 412 it seems to be a toggle type switch)
2 to 7 x MTS-223-A2 (ON)-OFF-(ON) spring-loaded switches
0 to 5 MTS-223-A1 ON-OFF-ON toggle type switches
some wires
2 x m3x20 screws and nuts
2 x m3x40 screws and nuts
1 x Simchair MKIII I2C controller (Arduino Leonardo based) (https://www.thingiverse.com/thing:2919692)
1 x Simchair MKIII collective (single or twin-throttle version)

1x TJ8-8P8 ethernet socket

You will find more info on my site:
http://hc625ma.org/ab412-collective-head/