UART88's with DISPLAY BOARDS

UART CHIP 14469P

UART8807D 7 OUTPUTS with DISPLAY

This UART design is rich in front panel display.

Address led in the center with clear lense

Seven yellow outputs (1 internal reserved)

Sixteen inputs in real time

Sixteen inputs in latched-untill-read format

Current monitor, and traffic monitors

This UART model has a display board and takes much longer to build. All of the extra display ribbons are not neccessary and only yeald a better looking front panel. Being basically lazy, I only built a few of this design.

Back side of display board.

16 quad inputs: 8 on each side of the board. Quad connector contains:

ground

5v power to sensor

sig input from sensor

control output to sensor.

Actual live sensors could be used or simply dry contancts.

The quad connector never worked out very well. The male connector could easily fall out. If this was the only monitor of the parameter, consiquences could be dramatic. If other sensors also covered the parameter, then at best, the situation was confusing. Later, the continuous dual header configuration worked better because it was difficult to pull off.

HexFet outputs
HexFet design was later changed to relay design, although there never was a problem. Reed Relays were choosen because they were the same price, and gave better isolation.

The Uart controls seven outputs

One of those outputs is used to reset sensors that have memory devices. Very fast events can be captured by certain sensors. Those sensors hold that information until they are read by the UART. (A hexfet works well for this purpose.) Therefor, This model has only six usable outputs.

The bottom board interfaces with the front panel at the edge. The verticle board interfaces broadside.

Notice that the broadside display board could be used with either the 7OUTPUT model or the 16OUTPUT model.

7 OUTPUTS in yellow
RICH DISPLAY

7 OUTPUTS

UART8807D 7 OUTPUTS internal SCR's

7 OUTPUTS on the bottom RED LEDS
Wire wrap prelim model, did not go into production...
LED holders
Yellow LED address match in center
Red Internal SCR memory latches

Address led in the center with clear lense

Seven yellow outputs

Sixteen inputs in real time

Sixteen inputs internally latched

Current monitor, and traffic monitors

16 OUTPUTS

UART8816D 16 OUTPUTS with DISPLAY

16 OUTPUTS

Address led in the center with clear lense

Sixteen yellow outputs

Sixteen inputs in real time

Sixteen inputs in latched-untill-read format

Current monitor, and traffic monitors

16 outputs were obtained by multiplexing 6 outputs with a strobe.
Only ONE output can be controlled at a time, and that output is a latch. It takes about five seconds to command all 16 outputs. For most things at a broadcast site, this is quite acceptable. Most devices do NOT need to control more than they see.

When I began to use microprocessors instead of UARTS, simultaneous outputs returned to me.

16 outputs (on top leds)

CognizantWire Systems