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| [http://old.ystv.co.uk/internal/docs/index.php?page=YSTVUserManuals http://old.ystv.co.uk/internal/docs/index.php?page=YSTVUserManuals] | | #REDIRECT [[:Category:Home-Made]] |
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| Links will be added slowly to YSTV's bodges. This page is only for the stations made-from-scratch, or heavily-altered equipment.
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| Currently I (Malcolm) am trying to fix new comms.
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| === [[Composite to Scart]] ===
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| These are not quite as simple as they first appear. They send the composite video signal of up to four inputs to the correct pins of a corresponding Scart plug. ''Additionally'' they send 12 volts (from the DC input) to the appropriate pin of the Scart plug.
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| === [[S-Video to Composite]] ===
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| S-video to composite pin and capacitor detail can be found here [http://www.epanorama.net/circuits/svideo2cvideo.html http://www.epanorama.net/circuits/svideo2cvideo.html]
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| === [[Three Composite along Cat-5]] ===
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| This was originally used at Woodstock 2007. It is a very convenient way of getting three camera video signals from approximately the same location to their common destination. It could also be used to send mono sound to the destination too.
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| ==== Other Less Significant Devices:====
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| VGA + Audio over CAT-5 set
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| Rextron part number EVA214, consists of a transmitter (part no. EVA12L, serial number V37034HG00065) and receiver (part no. EVA02R, serial number V35034HG00065) which are linked using any convenient CAT-5 network cable. You can then put a VGA video signal plus mono audio into the transmitter, and get them back out of the receiver. Also has built-in DAs at both ends, so each box has two independent outputs, as well as the CAT-5 output from the transmitter. This is the key part of the CamerasDownCat5 technique first developed for Woodstock 2007.
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| Dirty Little Box
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| Dirty, in this case, because it's not very sophisticated. This will convert a 50Hz, interlaced RGB video signal (like the output of a Comodore / Acorn / BBC computer) to a composite video signal. It doesn't do any resolution changing or frame rate conversion, so if your input video isn't at the right rate (and most PC VGA cards won't do the right rate) then the output will go to pieces. As a result this isn't the most useful piece of kit in the station.
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| VGA DA
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| Does what it says on the tin - splits a VGA input signal into two identical copies to drive two monitors or projectors at full signal strength.
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| VGA to Composite Dongle
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| A rather nasty widget that converts a VGA output from a PC (at any sensible low resolution) to composite and S-video outputs. It's powered from a USB plug (to get 5V), which can if necessary be put in another PC's USB port. It should be noted that as there is no USB data connection, the PC doesn't know that any power is being drawn from the port.
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| S-Vid switcher
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| A 4-to-1 or 1-to-4 passive switcher for S-video signals (although it can also be used on composite with the relevant adaptors). Being passive, it's not frame-synchronised, it just uses mechanical switches. Not clear whether the inputs are terminated when not selected or not.
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| A-V switcher
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| S-Vid to Comp converter (and Comp to S-Vid)
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| A very nice active box for converting composite outputs into S-video, or S-video signals into composite. Avoids the signal loss and resolution loss associated with passive converters by actually extracting the relevant signals and sending them down the required cores, and actively combining the s-video signals to the composite output.
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| S-Vid DA
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| Splits an S-video input into three identical outputs. As well as the basic active splitting, also provides gain and HF boost controls for the chroma channel, to correct for colour loss on long cables. Can be used on composite video through the S-video luma channel (chroma channel is a bit oddly behaved) as a 3-ouput DA.
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| Audio Isolators
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| VT C-E switch
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| A metal box with three BNC connectors and a switch in it. The switch picks either of the inputs to connect to the output. The unused input is supposed to be terminated, although this doesn't appear to work reliably. In the obvious sort of way, can also be used backwards.
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| and anything else I don't yet know about.
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