Skyview Connector board

diablouser

I love flying!
Joined
Jan 27, 2013
Messages
29
  I am developing, for myself and for enjoyment, a PC connector board that will allow most of the system wiring to use a bunch of connectors on one circuit board.  The idea is that each individual instrument/device will have its own dedicated cable.

The idea is to have about 16 connectors on the board that will provide a place for every instrument in the system to plug in.  It would start with two 37 pin that will have all the Skyview inputs, except power and ground.  They would be bused together (serial ports, audio, SV-GPS, USB socket, dimmer, audio) , not bussed such as the SV-BATs, or have the ability to jumper together for the Contact inputs and the six not used . 

The SV-bats would have a pair of two pin power Dsub connectors.  SV-GPS and USP socket would have their own D subs. 

There will be a power D sub with a to be determined number of pins that will be the power and ground for the complete system.   The Transponder, for example, would have its switched or fused power run to the power plug.  The Transponder plug would have PC connections to the EFIS bus Serial ports and the power plug power and ground.  There would be the same thing for all the Serial ports.

A 37 (25?) pin plug with all grounds would be on the board to provide a common ground for Avionics, etc.

The board will be two sided with appropriately sized lands to deal with the power circuit amperages.

I do have questions for Dynon.

The six "Do Not Connect" pins, are they intended for a future use or just not used? (If not used, I could gang them on to board to provide enough PC land for the amperage required.)

How are the Contact Inputs going to be used?  Will they looking for a ground or voltage input?

The list of D sub connectors, for kicks and grins are:
 
SV-D1000
SV-D1000
SV-GPS-250
SV-BAT-1
SV-BAT-2
USB Plug
SV-XPNDR-260
SV-ADSB Rec
Spare Serial Port 1
Spare Serial Port 2
Audio panel
Dimmer Control
Contact Output
Power/Ground In
Spare

Bruce Patton
 

dynonsupport

Dynon Technical Support
Staff member
Joined
Mar 23, 2005
Messages
13,226
So first off, every SkyView display comes with a nice, pre-made harness. This harness is made of quality machined pins, and tefzel wire. It includes a connector on it that plugs right into the backup battery, as well as a USB connector on the cable. So creating this PC board will mean that you are not using the pre-made harness. In reality, you only hook up about 10 wires off this harness to things (5X serial ports and audio) so running all 37 wires to a PCB to connect 10 may be overkill.

You will run into a few issues:
1) USB will not make it. USB must be run over a USB cable, with a shield, twisted differential pairs, and controlled impedance. This is what is on the harness we supply. Running over normal aircraft wires for some length, into one D-Sub connector, across a board, out another D-sub, and then to a USB connector will kill the signal for sure.

2) We really don't want you extending the battery cable longer than 2' from the screen for noise and power drop reasons. So you need to keep this short

The do-not-connect pins have electrical things hooked to them but will never be used in an airplane. So you can leave them disconnected, but do not short them to ground or anything.

We don't know how or if the contacts will ever be used. If they are, they will be switches to ground.

SkyView has a built in light sensor, so very, very few customers use the dim input or output.
 
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