12V 2ch Video Switch

12V 2ch Video Switch
12Volt 2 Channel Video Switch
Setup and Utilization
Manual
Introduction
Thank you for purchasing the 12 Volt 2 channel Video Switch. This revolutionary device will allow
you to switch between two 12V cameras or two video sources using your RC transmitter.
Please note:
note: You cannot use this device to switch between a 5V and a 12V camera. Both cameras
have to be 12Volt.
The PPM RC transmitter/receiver uses pulse modulation for the signal which controls your RC
Equipment in the plane. These pulses occur every 20ms, and their length may vary from 1ms to
2ms.
By electronically checking the length of the pulse, we can determine the position of the transmitter
stick. You may also switch on your RC transmitter in order to decide which video channel to select
for the output. The switching between the video sources occurs in less than 1ms. This gives a few
barely noticeable switching frames on your outgoing video.
This device will measure the incoming pulses from your R/C receiver, and it will switch from Input A
to Input B depending on the position of the RC switch or stick on your transmitter.
Device and Pin Description
The 12V 2 channel mini video switch uses servo type connectors. The pin settings on these
connectors are the same as on the servo connectors: Pin 1: GND (Black Wire), Pin 2: +12V (Red
Wire), Pin 3: Signal (Yellow, Orange or White wire).
All 3 connectors on the Mini RC Video Switch follow the same configuration. As for your reference,
on the bottom of the circuit board there are markings indicating which signal comes to which pin.
Please check out the following picture as reference:
The Input connectors are one above the other, and on the right side of the above picture. The
bottom of the circuit board will indicate which connector belongs to which input, and on the right of
the pins you can see markings like: GND for Ground (Black Wire), + for +12V (Red Wire) and s for
signal – in our case, this is the incoming video signal represented by the White, Yellow or Orange
wire depending on the manufacturer of your servo cable.
The cable, connecting your Video switch to the RC receiver, is also a standard Servo cable. Please
follow the instruction manual of your RC receiver for the orientation and connection of this to your
receiver.
Features
The 12Volt 2 channel mini video switch has some nice in-built features in order to make the use of
this device much more enjoyable.
The programming on the microprocessor of this switch incorporates the following features:
- It allows you to use it on a switch or a stick on your transmitter radio;
- There is a safety feature built in, which will allow the switching to occur only after it
received 5 valid switching signal pulses. This happens in about 100ms, so one cannot notice
this timeframe, but it is enough for the device to prevent accidental switching caused by an
RC glitch.
- Additional safety feature: In case the RC signal is lost, the device will switch back to Input
1 after about 4 seconds. The rationale behind this is the following: In case you have a
forward and a backward facing camera, and you loose RC control while looking backwards,
the device will switch back to the forward facing camera (assuming that this is connected to
Input 1) in order to allow you to look forward and resume flying the plane with forward view
once you regain control. This feature is always useful to notify you that you are dangerously
close to loose RC control of your plane.
(Please
Please note: If you are using a Switch on your transmitter
transmitter to control the Video switch, as
soon as the RC signal comes back, the video switch will switch back to the camera which is
corresponding to your switch position)
position
Setup Instructions
Before connecting the 12Volt 2 channel video switch to your receiver, please decide which channel
you would like to use for it. In our example, we use Channel 5. On the selected channel you should
be able to adjust the so-called Endpoints, Travel or ATV.
Make sure that you plug the cameras to Input 1 and Input 2 while respecting the pin assignments.
Reversing these connectors may harm your camera, so please be sure that you connect the wires in
the proper direction.
You will need to supply a cable to connect the output to your transmitter. The pin settings, as
described above, follow the pin settings of a standard servo wire, where black is the Ground wire,
Red is the +12V and white, yellow or orange will be your signal – in this case Video Out signal.
In case your transmitter does not supply +12V, you will need to connect the red wire to a properly
filtered, regulated +12V power supply line. Make sure the transmitter, cameras and the video
switch has a common ground.
The servo cable attached to the 2 channel video switch is supplied with a proper servo type
connector, so you can plug this into your RC receiver.
Once you have chosen the channel you would like to operate the RC switch on, you will need to
make sure that your transmitter has either a switch or a stick assigned to this channel. On some
transmitters, Channel 5 is set automatically to a switch for the landing gear, but you may need to
use a different Channel in case you use a head tracker or any other device that requires access to
Channel 5.
Now you can plug the connector in the selected channel on your RC receiver, and make sure that
you respect the orientation of the connector. In case you plug this in reverse, it will not harm the
device, but the device will not operate.
After one last careful check to see that everything is plugged in correctly, you can turn the power
on.
Right after turning on the device, the picture received from the source connected to Input 1 will be
displayed on the Output line – unless the switch assigned to the device is in the opposite direction.
In that case, the picture coming from the source connected to Input 2 will be displayed on the
Output.
At this point you can flip the switch assigned to the 2 channel video switch into the opposite
direction, and the picture should flip from one camera to the other. Please note: Initially after the
power on the device will require 2 or 3 flips to recognize the switching request, but once it has
learned it, it will switch at each flip of the switch.
In case if no switching occurs when you flip the switch, you will need to adjust the ATV or endpoints
on the selected channel to 100-110%.
Technical Specifications
Supply Power:
The 2ch video switch should be powered from a regulated 12V power supply where the supply
voltage should not exceed a maximum of 12V. The 12V is pass through, it will supply your cameras
through the servo cable with the same source 12V which is connected to the switch.
Pulse range:
The 2 channel video switch is designed to switch based on the pulses coming from the receiver
within the following limits:
Position
Lowest
Middle
Receiver Output
Pulse Length
1.0 ms
1.5 ms
Highest
2.0 ms
Switching occur
When signal is less than 1.2ms
No switching while the signal is
between 1.2ms and 1.8ms
When signal is more than 1.8ms
The Middle range is included in the calculations to accommodate requests to have this switch
assigned to a channel which can be controlled by a stick on your transmitter. In that case, just
slightly pushing the stick to the left or right position will flip the image on the output.
Connection Cable Length:
Standard Hitec 24 gauge servo wire approximately 12” (inches) or 30cm (centimetres).
Receiver Connector type:
Standard 3 pin Hitec servo connector.
Troubleshooting
In case you have any concerns or problems using this device, please contact us at
customerservice@nghobbies.com or through the “Contact Us” page at www.nghobbies.com
Copyright @ 2008, New Generation Hobbies.
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