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  #681  
Old 08-15-2018, 08:16 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
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sure, Gil also mentioned something about diodes. we can sketch something. also, I was thinking of having some labels printed. Hetico did that at a print shop. all the labels on clear 8.5 x 11, chose what you want, was not expensive. need to find some artwork.

16mm momentary lights. no test switch needed for these because it's built in. one or two of these lights could be latching for dimming and off if desired. or I could add a separate toggle switch.









for those that want more panel overlap, this is the .2" overlap version



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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 08-15-2018 at 09:02 PM.
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  #682  
Old 08-15-2018, 10:54 PM
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az_gila az_gila is offline
 
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Location: 57AZ - NW Tucson area
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Quote:
Originally Posted by Steve Melton View Post
...

for those that want more panel overlap, this is the .2" overlap version



How do I get one of those?

That's one of my planned indicators for my -10 panel - from left to right -

Red - Master EFIS warning
Orange - Left Door Open
Orange - Right Door Open
Orange - Baggage Door Open

No switching or dimming needed, only indicators - the EFIS light can be inhibited from the screen, and I wouldn't want to even take off with any of the other three on.

Does PayPal work for you?
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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  #683  
Old 08-16-2018, 05:19 AM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
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Quote:
Originally Posted by az_gila View Post
How do I get one of those?

That's one of my planned indicators for my -10 panel - from left to right -

Red - Master EFIS warning
Orange - Left Door Open
Orange - Right Door Open
Orange - Baggage Door Open

No switching or dimming needed, only indicators - the EFIS light can be inhibited from the screen, and I wouldn't want to even take off with any of the other three on.

Does PayPal work for you?
no charge, it was your idea. send me your address and I'll have Amanda ship it. I would appreciate if you would publish your wiring diagram for other to use and advise me of any improvements needed.

what color: white, grey, black?
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 08-16-2018 at 05:26 AM.
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  #684  
Old 08-16-2018, 08:44 AM
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Snowflake Snowflake is offline
 
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Quote:
Originally Posted by Scott Hersha View Post
If you are using LED lights, you have to vary the voltage (I think). Iíve used resistors before, and it worked OK, but you have to experiment with various sizes to get what level you want.
Resistors will work, but they do generate heat... More dimming, more heat.

The best way to dim an LED is through Pulse Width Modulation (PWM) where you pulse the LED at high frequency to reduce the time the LED spends on... Your eyes see it as dimming. This does require a more involved circuit, and careful attention to filtering to prevent noise.
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1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #685  
Old 08-18-2018, 07:31 AM
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Steve Melton Steve Melton is offline
 
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Quote:
Originally Posted by Snowflake View Post
Resistors will work, but they do generate heat... More dimming, more heat.

The best way to dim an LED is through Pulse Width Modulation (PWM) where you pulse the LED at high frequency to reduce the time the LED spends on... Your eyes see it as dimming. This does require a more involved circuit, and careful attention to filtering to prevent noise.
well, if dimming is needed it seems it may be more complicated.

working on the stitching appearance on the forward face. to get a nice appearance it requires the hole thru the forward face to be printed closed and then opened from the back thru the guide hole. I think it's worth it because it looks better. cut template is added in the photo. this one is done. I'm happy with it.









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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 08-18-2018 at 08:35 AM.
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  #686  
Old 08-18-2018, 09:01 AM
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az_gila az_gila is offline
 
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Steve, my only change request would be for a version that is basically square with only slightly rounded corners.

This would fit in with all of the other stuff on a typical glass panel.

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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ

Last edited by az_gila : 08-18-2018 at 07:33 PM.
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  #687  
Old 08-18-2018, 10:11 AM
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Steve Melton Steve Melton is offline
 
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yes, that's a simple change and would cover the panel nut plates rivets better. the current distance from the screw hole center to the edge is .39 inch. that could be slightly smaller to reduce the overall width.

center of hole to panel edge = .39 inch
cutout clearance = .020 inch
non floating #6 nut plate width = .265/2 = .133 half width
non floating #8 nut plate width = .297/2 = .149 half width
floating nut plate #6 and #8 width = .416/2 = .208 half width

#6 hole = .144 dia /2 = .072 radius
#8 hole = .170 dia/2 = .085 radius

for #8 screw
.39 - .085 - .020 = .285 inch distance from edge of screw hole to cutout
non floating nut plate, .39 - .149 - .020 = .221 inch from the edge of the non floating nut plate to the cutout
floating nut plate, .39 - .208 - .020 = .162 inch from the edge of the floating nut plate to the cutout

I could reduce the distance of the hole to the panel by .10 inch and still have .062 clearance for a floating nut plate. So, .39 - .10 = .29 inch. That will reduce the overall width slightly. All other fastener options will have greater clearance.

your thoughts?

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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 08-18-2018 at 10:14 AM.
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  #688  
Old 08-18-2018, 10:23 AM
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Snowflake Snowflake is offline
 
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These look really good, so I offer this as constructive feedback that may improve the product! The two posts out to the panel for the DB9 connector seem to be less beefy than one might want... They'll be subjected to vibration, and they seem like long, slender beams (relative to their cross section) that might vibrate a lot. They might also be subjected to random tugging or jostling when working behind the panel. Is there any way to make them with more of an I-beam shape? I guess the screws are right where the caps of the I-beam would go, unless you can make the beam C-shaped and push the caps slightly one way and the screws the other?

Quote:
Originally Posted by Steve Melton View Post
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1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #689  
Old 08-18-2018, 10:41 AM
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az_gila az_gila is offline
 
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Quote:
Originally Posted by Steve Melton View Post
yes, that's a simple change and would cover the panel nut plates rivets better. the current distance from the screw hole center to the edge is .39 inch. that could be slightly smaller to reduce the overall width.

......

I could reduce the distance of the hole to the panel by .10 inch and still have .062 clearance for a floating nut plate. So, .39 - .10 = .29 inch. That will reduce the overall width slightly. All other fastener options will have greater clearance.

your thoughts?
I think that is a great idea.

Also #6 mounting hardware would seem to be appropriate since that is what instruments and the glass panel stuff usually use.
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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  #690  
Old 08-18-2018, 11:28 AM
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Steve Melton Steve Melton is offline
 
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I like it.

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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com
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