JED Microprocessors Pty Ltd

Presenting the JED T430 low-cost

Projector Controllers

Nov 22nd, 2009

Demonstrating the JED T430

• T430 is a very low cost RS232 wired controller with status LEDs and a choice of two keyboards;

• LEDs flash during warm-up/cool-down lockout;• Communications status read by pressing OFF.

This simple keyboard allows the user to turn the projector on and off with a simple button press.

The projector is sent a source select for one preset, switch-selected, channel after warm-up.

JED T430-KB1

Choose your keyboard

This keyboard allows the user to turn the projector on and off with a simple push button press, and then switch between two channels each time the On / Source key is pressed again.

The choice of channels is made via “Option” switches on the back, and it can be between:

2 Computer channels;2 Video channels; or1 Computer and 1 Video channel.

JED T430-KB3

Off key/LED: Quick system check

• The OFF LED shows in the “rest” state;• The OFF button can be pressed in the OFF state,

and the T430 polls the projector. If the projector replies correctly, the OFF LED flashes once;

• If NOT, it flashes three times.

ON key: System starts

Pressing the ON key starts the projector, and the ON LED flashes during warm-up.

At the end of warm-up, it sends a channel message to the projector, and this LED flashes again.

The projector starts on the channel preset by the DIP Option switches on the back.

System running

After warm-up is complete, if it is a computer channel, and the Option:2 switch on the back is selected, an Auto-Pixel-Align command is sent 30 seconds later. This is needed for some projectors.

Source change

If it is an On / Source keyboard, pressing the On / Source key at any time allows changing to the alternate source (as selected by the DIP Option switches on the back).

This can be between two computer sources, two video sources or between one of each.

At the end of the show: Just press OFF

The red LED flashes for the length of the programmed cool-down period, and then goes into steady OFF state ready for the next cycle. (Warm-up and Cool-down time can be manually altered at setup.)

T430 back view: Switches

Reset switch.

(Always press after changing any settings.)

Sw2 & 3 to set projector family codeMUST be set at install time by tech.

(e.g. 12 hex, selects NEC 9600 baud family. See part B of manual.)

Option switches 1 to 8 for special functions, e.g. select S-Video, auto pixel align, PIR/Timer start, double-hit mode, channel selects (2 computer, 2 video, or 1 video & 1 computer).

Options SW2 SW3

(Note: The same circuit board is used for the JED 430 and 440: That is why the board is labelled “440”)

T430 back view: Connections 1

GroundTX command to projectorRX reply from projectorCTS (option) to projector

9 to 20V power + striped wire - plain wire

RS232 to projector

T430 back view: Connections 2

PIR inputGround

Passive Infra-Red (PIR)

This sensor can reset an internal timer, so the projector keeps running while students are present, but it times out and turns off when everyone has gone home!

The PIR can also start a projector when people enter a show-room or gallery.

T430 back view: Connections 3

Used to switch the USB ports from two computers in a classroom so that either can control an Electronic Whiteboard.

JED 439 USB switcher

The 439 switches USB Whiteboard control between a classroom PC and a teacher’s “guest” laptop, when the T430 selects between Computer:1 or Computer:2. Control can be via auto-sensing of 5V on the USB line or by a control line output shown by the arrow above.

An optional output here can drive the 439 to select USB channels.

T430 back view: Connections 4

IR bug connects to this socket to signal to Epson X5 etc via IR.

Optional IR bug socketCable shield (ground)Inner (LED drive)

This bug is stuck onto projector IR window:

IR transmitter to non-RS232 projectors

IR Tx

T430 back view: Connections 5

CAT5

Easy connection option: Plug in a CAT5 cable as the only connection from the T430 to the projector.

Then run power, RS232, PIR all down the one cable from a plug pack up with the projector.

Or use the T447 (below left) to connect it all together up the top, including a signal tester. (See the LEDs which flash with communications.)

CAT5

JED T430 single-channel block diagram #1: projector/no-audio control configuration

VGA

Comp./S-Video

Projector RS232 (or IR)

video control

12 volt plug pack

12v

Blue: RS232Black: VGA/VideoGreen: PIR

PIR detector

or

Note: No Audio

(Only one channel)

JED T430-KB1

JED T430 single-channel block diagram #2: projector/manual-audio control configuration

VGA

Comp./S-Video

Projector RS232 (or IR)

video control

12 volt plug pack

JED T430-KB1

12v

PIR detector

or

Note: No Audio control by T430 … control mustbe done externally, either on screen or via a manual control knob.

Power amp.+ speakers

Blue: RS232Black: VGA/VideoRed: AudioGreen: PIR

Poweredspeakers

(Only one channel)

JED T430 two-channel block diagram #3: projector/no-audio control configuration

Power amp.+ speakers

Poweredspeakers

VGA 1

VGA 2

Comp./S-Video

Projector RS232 (or IR)

video control

12 volt plug pack

12v

Blue: RS232Black: VGA/VideoGreen: PIR

PIR detector

JED T430-KB3

On/Source key toggles between VGA1 & VGA2 or between VGA1 & video

JED T430 two-channel block diagram #4: projector/manual-audio control configuration

Power amp.+ speakers

Poweredspeakers

VGA 1

VGA 2

Comp./S-Video

Projector RS232 (or IR)

video control

12 volt plug pack

12v

Blue: RS232Black: VGA/VideoRed: AudioGreen: PIR

PIR detector

JED T430-KB3

On/Source key toggles between VGA1 & VGA2 or between VGA1 & Video

Manual controlled

audio to speakers

Software for the T430The software for the T430 contains drivers for all covered projectors and flat panels, and the code set onto the two rotary switches selects a driver, with options for baud rate and minor code differences.

There are no specific models selected by number, as in the T460, rather many models are covered by each setting. Typical models arenoted in the user’s manual and the “covered projector” lists by release.

One big advantage of the T430 is that you never have load each controller at install time from a lap-top or by capture from a hand-held IR remote … just set the switches.

As JED includes new drivers, these are made available to distributors, and an older T430 can be updated and a new driver then selected.

The cable plugs into the T430’s serial port.