SkyView Display Installation and Configuration
SkyView System Installation Guide - Revision AA 4-33
External Dim Control (Dimming) Connections
DIM INPUT (Pin 25) The backlight level on a SkyView display can be increased or decreased
using a varying DC voltage of 0 to 36 volts DC, such as provided by the Dynon Avionics SV-
KNOB-DIMMER – see Accessory Installation and Configuration, SV-KNOB-DIMMER for details.
See Display Setup, External Brightness Management later in this section to configure brightness
levels for specific voltages.
DIM OUTPUT (Pin 26) The DIM OUTPUT signal is an approx. 120 Hz (may change in future
Software revisions) Pulse Width Modulation (PWM) signal directly proportional to the screen
brightness – 100% to 0.02%. This output is designed to directly control the dim level of devices
such as LEDs; a common use is for the back-lighting of switches in a panel so that they dim at
night in conjunction with SkyView’s automatic dim levels.
The DIM OUTPUT (Pin 26) signal is an open collector to ground - it acts as a switch to ground,
and does not source any power itself. Pin 26 can sink a maximum current of 120mA and a
maximum voltage of 40V. The DIM OUTPUT signal is not analog and cannot be used to control
the dim level of devices that expect 0-5V, 0-12V, or a resistance as their dimming input.
Do not connect the DIM OUTPUT (Pin 26) signal from multiple SkyView screens in parallel. The
DIM OUTPUT signals from each display is not synchronous, and this will lead to inconsistent
behavior.
Audio Output Electrical Connections
Dynon Avionics recommends that SkyView’s audio outputs be connected to an
unmuted input on your audio panel or intercom. When connected this way, critical
audio alerts generated by SkyView are not muted by ATC transmissions or other
audio events that could cause SkyView’s audio to be suppressed if it were
connected to a muting input.
SkyView’s audio output cannot be connected in parallel with a radio to a headset.
Doing so will significantly reduce the volume of the radio output, possibly to the
level that it is not usable. An intercom such as the SV-INTERCOM-2S, audio mixer,
or audio panel is required to utilize this output.
If you are converting a Dynon Avionics D10/D100 product installation to a SkyView
installation, you should remove the variable resistor that is connected to the
existing audio output wiring: SkyView’s audio output (volume) is adjustable.
The audio outputs on pins 13 and 31 (left and right, respectively) of the display’s D37 connector
can drive audio panel or intercom auxiliary inputs. When interfaced with such devices, they can
generally be used with any input designated as an auxiliary input without any external resistors
or other components needed between the SkyView and the intercom.
Use left and right audio outputs for stereo mode. If the audio panel or intercom only supports
mono input, short the left and right audio outputs together and connect them to the mono
input on the device. To minimize noise, ensure that your SkyView audio ground and intercom or
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