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  #1  
Old 07-20-2019, 04:17 PM
Ebbe Ebbe is offline
 
Join Date: Feb 2016
Location: Calhoun, GA
Posts: 26
Default Homebuilt Avionics 2.0

Hello again!

Since my last post in 2016, I have re-done the panel from scratch. I was not happy with EFIS and Engine Monitor designs. Audio Panel and Autopilot are still the same, but have new front panels to fit with the modified "form factor". As my skills in miniaturizing have improved steadily, I realized I could/should redesign them from scratch.

The new EFIS weighs less than half, uses 30% less power, 2" deep vs. 3", more powerful graphics, starts in 7s vs. 30s. And parts cost approx $400 less per EFIS. How is that for an upgrade? Only thing I could reuse was the LCD panel, unfortunately.

The upgraded engine monitor uses the exact same LCD, but is less powerful than the EFIS.

By having the boxes build out less behind the panel, I could mount them slightly closer to the left/right edges without them hitting the canopy deck. By using even smaller horizontal spacing, and having the mounting holes go above/below the rectangular opening, I could fit five units -- with some space to spare.

Having the mounting holes that close together was a concern. I used the unorthodox approach of a thick panel and threaded holes. A 3/16" panel (6061) and 6-32 provides 6 threads. I tested with a 3/16 piece, and did multiple tightenings with different torque settings on my Ryobi -- no problem. Total weight of the new panel was still less the previous one. Which in turn was well below the original steam gauge panel.

I plan to post all design notes on a separate website (sorry, no complete software will be posted for now), and will be free to use for anyone as maybe a starting point for a similar project.

Can a forum moderator please chime in if this is OK? I don't want do drive traffic away from this site. We can still discuss designs here, but the repository of files would be on a different site.


See you all at Oshkosh. First time flying in for me, so I'll wait to midweek to arrive.

Ebbe






[ed. Jaw. On. Floor. Just stunning!!!! v/r,dr]
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RV-7A, purchased from builder
IO-360, ~450 hrs
Avionics: own design
KCZL - Calhoun, GA

Last edited by Ebbe : 07-29-2019 at 09:34 AM.
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  #2  
Old 07-20-2019, 06:50 PM
YellowJacket RV9 YellowJacket RV9 is offline
 
Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,330
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This is super impressive and what EAB is all about. Definitely interested in learning more!

Chris
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RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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  #3  
Old 07-21-2019, 07:49 AM
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mjanduda mjanduda is offline
 
Join Date: Jul 2018
Location: Munich, Germany
Posts: 120
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Great job!

I also would like to know more details, see some specs and plans
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  #4  
Old 07-21-2019, 10:34 AM
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Snowflake Snowflake is offline
 
Join Date: Oct 2009
Location: Sidney, BC, Canada
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Eagerly awaiting the day one could duplicate this on another aircraft.
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1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #5  
Old 07-21-2019, 11:29 AM
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GalinHdz GalinHdz is offline
 
Join Date: Mar 2010
Location: KSGJ / TJBQ
Posts: 2,279
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When it comes to avionics, I am not easily impressed. But this is IMPRESSIVE!!!

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Last edited by GalinHdz : 07-21-2019 at 01:51 PM.
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  #6  
Old 07-21-2019, 01:43 PM
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mjanduda mjanduda is offline
 
Join Date: Jul 2018
Location: Munich, Germany
Posts: 120
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I could imagine replacing your screens with 10-12" touch displays and programming the UI with Unity.

Which servos do you use for the AP and how do you interact with them?

Last edited by mjanduda : 07-21-2019 at 01:56 PM.
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  #7  
Old 07-21-2019, 04:24 PM
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DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,331
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Hey... are those Omron B3N-9000 series pushbuttons? If so... PM me, I may have a bunch of surplus stock from a product I used to make.
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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  #8  
Old 07-21-2019, 04:46 PM
Ebbe Ebbe is offline
 
Join Date: Feb 2016
Location: Calhoun, GA
Posts: 26
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Quote:
Originally Posted by mjanduda View Post
I could imagine replacing your screens with 10-12" touch displays and programming the UI with Unity.

Which servos do you use for the AP and how do you interact with them?
Malte,

I use MGL stepper motor servos. They support CAN and RS-232, my controller uses CAN.

Ebbe
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RV-7A, purchased from builder
IO-360, ~450 hrs
Avionics: own design
KCZL - Calhoun, GA
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  #9  
Old 07-21-2019, 06:34 PM
Ebbe Ebbe is offline
 
Join Date: Feb 2016
Location: Calhoun, GA
Posts: 26
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For lack of a better name, I created the site www.homebuiltavionics.com that has most of the design documents in the Files section. When I have more time after Oshkosh, I'll update it with more descriptive details.

For the PCB's, you'll need Sunstone's free software www.sunstone.com/pcb-resources/pcb-downloads to view and modify the boards.

Some mechanical drawings are in PDF's, but all original design drawings are DWG, so you need AutoCAD. Other (free?) software can probably at least view that file format nowadays.

Front panel files (.FPD) are viewed using Front Panel Express free software. http://www.frontpanelexpress.com/fro...gner/the_idea/
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RV-7A, purchased from builder
IO-360, ~450 hrs
Avionics: own design
KCZL - Calhoun, GA

Last edited by Ebbe : 08-05-2019 at 06:30 PM.
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  #10  
Old 07-22-2019, 05:17 AM
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mjanduda mjanduda is offline
 
Join Date: Jul 2018
Location: Munich, Germany
Posts: 120
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Great! Thank you!

Maybe you could also upload PDFs of the schematics? Would be easier to view
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