I've been gradually testing the functionality of my HomeBrewedGlassPanel utilizing my Linux-based computer
connected to a DLP-IO20 data acquisition board.  So far everything has worked.  Only problem is that my $8 pressure sensor which is to
become my airspeed indicator keeps falling off my circuit breadboard, and it doesn't fit into any of the sockets I have in my junk box.
I guess I need to solder some longer leads onto the chip.
Otherwise all my temperature sensors seem to be working well.  I even connected the unit up to a CdS photo sensor for kicks, so I can now
even have the computer check to see if it is daytime or nighttime :)

I still need gyro sensors, and then I should be "good-to-go"

Oh yes ... one thing.  What do you guys do for a tach?  I would rather have an analog signal source for the panel's tach display and not digital.
A couple of % precision should be adequate.  Digital I/O eats up a lot of computer hardware resources.

R Berglund

Henry's tach is digital only.

An analog tach is easy to make as you feed the CAS through a 4050 CMOS gate and feed the nice rectangular wave pulse through a diode into a capacitor. There needs to be a resistor across the cap to bleed the charge other wise you will just get constant DC. A bit of experimenting with the value of the cap and resistor and you are home free.


Paul Lamar