Electronics help/information requested…

[AAnnillo]

Greetings, all.   

I'm in the process of determine pin out assignments for my Boeing 727-200 flight deck instruments and gauges and have managed to obtain some information from manuals and my complete wiring guide (4 thick volumes) for this aircraft.

Regarding synchro-resolvers
I am seeing notations and connections referencing 'X,' 'Y,' 'Z' (which I understand are for sine-cosine values for the various phases) and understand the principles of these.  I'm also seeing references to 'H,' 'C,' 'H1,' 'C1,' 'M,' and 'G.'  I am presuming that these are for supplied power—- H for Hot (positive) and C for Common (negative).
I'm not entirely sure on these additional letters.   I've researched synchro-resolver operations and applications but cannot determine confirmation of my suspicions.

I also have a power inverter, 28VDC input to 115VAC/26VAC 400Hz output and absolutely love the hum from the power inverter when powered-up.  I'll be experimenting with some circuitry soon to step down this AC power to 11VAC, which is what many of the synchro-resolver X, Y and Zs require to operate.

Can anyone here provide any additional information on the synchro-resolvers?

Thank you very much in advance.

Stay well.

Antny

[Mike.Powell]

Google "Synchro/Resolver Conversion Handbook" and "Synchro and Resolver Engineering Handbook". Both are available as free PDFs.  Also, I'm revising an old digital to synchro project, updating it with Arduinos and CAN bus. I post status updates on my site mikesflightdeck.com

[AAnnillo]

Thank you very much for the reply.

Previously, I had seen both references and neither makes reference to the H, C, H1, C1, M nor G symbols.

I have bookmarked your website and will be monitoring it for further updates and information on your digital-to-synchro project.

Question:  Once completed, will you be offering the boards for sale to the public?

Thank you again for taking the time and interest to reply.

Antny

[Mike.Powell]

I won't be selling hardware. I may write a small e-book about building and using digital to synchro converters.

[AAnnillo]

I look forward to future posts on your website.

[Trevor Hale]

So good to see you around again Mike. 

I do hope you do some more writing.

Trev

[Mike.Powell]

I have notes and ideas about entry level sim building using 3D printing and Arduinos. Think Cessna 172-ish instruments, radios, etc., and CAN bus. I like CAN bus. It's a great tool for reducing wiring complexity.


What do you think the flight sim community would be interested in reading?

[Trevor Hale]

I have notes and ideas about entry level sim building using 3D printing and Arduinos. Think Cessna 172-ish instruments, radios, etc., and CAN bus. I like CAN bus. It's a great tool for reducing wiring complexity.


What do you think the flight sim community would be interested in reading?

To be honest, Although the information is now dated, I still encourage people to get a copy of your Original Book.  Perhaps an updated version, since technology has changed so much.


Trev

[bernard S]

simple is always better     introduce other things buy yes can buses way to :-)