![]() ![]() The main feature of the graphic screen is that the led dot matrix of the light-emitting devices only light or off, and the intensity cannot be controlled, that is, this type of screen no gray level control, also name pixel led display controller/pixel led player. Generally, just display graphics, text led video wall called graphics screen. It is the core component of the led display, mainly responsible for receiving the screen and video display information from the computer serial port, network port or DVI interface, placed in the frame memory, according to the partition drive mode to generate the serial display data and scan control timing that the led display can identify. LED display control system, also known as led display controller, led display control card, led video processor. LED display is several display units (led module, led screen panel or unit cabinet) can be combined and spliced to form the screen, plus a set of appropriate controllers (main control card or control system), so a variety of specifications of the display board or unit cabinet with different controllers can be composed of many kinds of led display, used to meet the different use of the environment and demand.Īs an essential component of the led video display, the control system accounts for 5-10% of the cost of the entire system of led display accessories, and it determines the merits of the screen display color, whether it can achieve a variety of colorful video effects, so we need to study it. I go this information from the silkscreen of the circuit board with the connectors also listed there is what I think is the company name and part number:Īgain my main plan right now is to make a schematic so that I can understand how everything is set up and then I'll think about either fixing the current configuration or exploring the possibility of improving on the configuration by adding new controllers and using new software.At present, led display has become a symbol of modern, international city, which can be used to play text information, animated advertising, video images, 3D virtual reality, in advertising, sports, transportation, finance, communications, business, broadcast and other industries are widely used. I say it looks like a HUB 75 connector because it has the same amount of pin but in a different order and instead of a C and D pin it has two extra red pins. The pin out of the HUB 75 looking connectors is: It looks like there is a reset button, and for physical connections, there are two ethernet ports (guessing they connect to the receiver card) and 8 connectors that look like HUB 75 but seem to have a different pinout. There was a 'sender card' in the office for some reason (did not know it was there). ![]() One of these days I'm going to dig the sign out of my closet, fire up the laptop, and put some sort of sniffer on the cable between them (it's just a standard 9pin cable), sniff out the protocol. Physical layer interconnect is RS-232 aka COMport. I also have that laptop, complete with software. I forget the name of the software, but the guy had maintained an ancient XP laptop (based on one of the early "Pentium 4 for mobile systems" chips, pre-Pentium M) because that was the only thing that would run it - he runs a local tech shop, no big deal for him ) I could be wrong - it's been in my closet for a while. Mine is based on an NEC V20 CPU with a half-meg of RAM, as I recall. How is the existing sign designed to be controlled (physical layer, connection to computer), and how is it damaged / nonfunctional / "broken"?Ī friend gave me a somewhat similar sign of his - it had supposedly died in a storm - I plugged it in, turned it on, and it was fine. What other skills would I need to complete a project like this?Īre there any suggestions as to what hardware, software, or example projects I should read up on? I also have programming experience with C/C++ and Python. I have some hardware experience with Arduino, Raspberry Pi, and I have designed printed circuit boards before. I am wondering how difficult it would be to use the existing LED panels to reassemble the sign to use a Raspberry Pi and use the software from that project to control it? ![]() That software has not been updated for over 6 years, and Windows 7 is needed to run it. It is currently using Linsn controllers and was configured using the Linsn LED Studio. The sign was assembled and configured by a company that refused to service it 3 months after when it broke. I found this really cool project by Solid State Group and I am wondering how I could use it to get an existing 3 foot by 2 foot LED sign working again. Hacking Existing LED Sign Kody Alan Rogers wrote at 19:30 ![]()
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