I asked for and received the book Building Simulated Aircraft Instrumentation by Mike Powell for Christmas. I’ve nearly worn it out already. It is a good read with some very sound ideas on construction of simulated instruments. Mike has done a great job of breaking down the process so anyone with patience and a few good tools can make instruments.
I think I will start with a stepper-powered airspeed indicator. The air-core movements look interesting but I have a box full of stepper motors and am familiar with driving them.
I high recommend this book to anyone wanting to build their own instruments.
It’s not covered in this book but I also have a prototype of a nav/com unit started. This unit will connect via USB and provide a general aviation style nav/com unit modeled after the Bendix 155a.