Engine display (N1, N2, TGT)

Author: fransedano  |  Category: Engine display modules


I got some engine display modules from a late b727, here are some pictures of the controller board and a short video:



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Fire module

Author: fransedano  |  Category: Fire Module

Controller board

Fire module from a b737



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Overhead controller module

Author: fransedano  |  Category: Overhead

128 Non-multiplexed inputs, 128 constant current outputs, with blink and dim capability, 16 7-Seg digits and I2c expansion.



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Author: fransedano  |  Category: electronics, Power distribution


Power controller board: Receives +26, +12 and +5 and, based on data received thru CAN, enables/disables power to lighting.

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Real 737 Throttle

Author: fransedano  |  Category: mechanical, Throttle

Just started dismantling and cleaning up of a real b737 throttle. Some pics on the process..

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GCC cross-compiler building for ARM target on Mac OS

Author: fransedano  |  Category: Flight sim, software


I’m building a new controller based on an ARM CPU and running Linux. So, time to install gcc cross-compiling toolchain on the development machines.

alias wget=’curl -O’

sudo mount -o resvport -t nfs /private/nfs

mkdir ~/crossgcc && cd ~/crossgcc
$ wget ftp://sourceware.org/pub/binutils/snapshots/binutils-2.21.52.tar.bz2
$ tar jxf binutils-2.21.52.tar.bz2
$ wget http://ftp.gnu.org/pub/gnu/gcc/gcc-4.6.0/gcc-4.6.0.tar.bz2
$ tar jxf gcc-4.6.0.tar.bz2
$ wget ftp://sources.redhat.com/pub/newlib/newlib-1.19.0.tar.gz
$ tar zxf newlib-1.19.0.tar.gz
$ wget http://ftp.gnu.org/pub/gnu/gdb/gdb-7.2.tar.gz
$ tar zxf gdb-7.2.tar.gz

The installation directory should be /usr/local/crossgcc.

$ sudo mkdir /usr/local/crossgcc
$ sudo chmod 777 /usr/local/crossgcc

First we build the binutils:

$ mkdir build-binutils && cd build-binutils
$ ../binutils-2.18.50/configure –target=arm-elf –prefix=/usr/local/crossgcc/ –enable-werror=no
$ make all install 2>&1 | tee make.log
$ export PATH=$PATH:/usr/local/crossgcc/bin

Build gcc prereqs

wget ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-4.3.2.tar.bz2
tar jxvf gmp-4.3.2.tar.bz2
cd gmp-4.3.2
./configure –prefix=/usr/local/crossgcc/ –enable-cxx
make install
make check

wget ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-2.4.2.tar.bz2
tar jxvf mpfr-2.4.2.tar.bz2
cd mpfr-2.4.2
./configure –prefix=/usr/local/crossgcc/ –with-gmp=/usr/local/crossgcc
make install

wget ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-0.8.1.tar.gz
tar jxvf mpc-0.8.1.tar.gz
cd mpc-0.8.1
sudo ln -s /usr/local/crossgcc/lib/libgmp.la /usr/local/lib/
./configure –prefix=/usr/local/crossgcc/ –with-gmp-lib=/usr/local/crossgcc/lib/ –with-mpfr=/usr/local/crossgcc/
make install

wget ftp://ftp.cs.unipr.it/pub/ppl/releases/0.11.2/ppl-0.11.2.tar.gz
wget ftp://gcc.gnu.org/pub/gcc/infrastructure/cloog-ppl-0.15.11.tar.gz

Build the gcc compiler with C/C++ support:

$ cd ../gcc-4.6.0
$ ln -s ../newlib-1.19.0/newlib .
$ ln -s ../newlib-1.19.0/libgloss .
$ cd ..
$ mkdir build-gcc && cd build-gcc
$ ../gcc-4.6.0/configure –target=arm-unknown-linux-gnu –prefix=/usr/local/crossgcc/ –with-newlib –with-gnu-as –with-gnu-ld –enable-languages=c,c++ –with-arch=armv4 –with-float=soft –enable-threads=posix –enable-symvers=gnu –enable-c99 –enable-long-long –with-gmp=/usr/local/crossgcc –with-mpfr=/usr/local/crosgcc

$ make all install 2>&1 | tee make.log

Build the gdb debugger:

$ cd ..
$ mkdir build-gdb && cd build-gdb
$ ../gdb-6.6/configure –target=arm-elf –prefix=/usr/local/crossgcc/
$ make all install 2>&1 | tee make.log

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Fire Module electronics

Author: fransedano  |  Category: electronics, Flight sim

Work in progress for Fire Module electronics:

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Glareshield done!

Author: fransedano  |  Category: electronics, Flight sim

Just a small weekend project just finished: Glareshield.

Inside all is custom electronics which communicates over the CAN bus in the cockpit.

This is the MCP as seen from the controller:

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Attitude indicator fixed, reading position now working

Author: fransedano  |  Category: Attitude indicator, electronics, Instruments


Not much progress in the attitude indicator, because .. It has been snowing heavily … And we had to make some snowmen!

Finally I managed to install all the small wheels on the (almost) right position and now the instrument is working again:

I finished the board to control the attitude indicator by adding PWM sin generator and reading SIN/Cos values from resolver, now I can read the position from the attitude indicator. Now it’s just a matter of coding a PID controller on the microcontroller to position the indicator to the desired position.

This is the prototype board

A video showing how it works:

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Does anybody know a good watchmaker who can fix this mess?

Author: fransedano  |  Category: Attitude indicator, Instruments


I couldn’t follow the cables going out of the AC motors and the resolvers, so I thought it would be a good idea to disassemble the Attitude indicator and follow them. This is what I have now…. It’s going to be a looong weekend fixing this mess…

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