This a solid aluminium box with 6 inch X 3 inch X 2 inch long ..on one side it has got a 25 pin parallel printer port and on the other side a lan port + 3 leds's + a DC power connector..
will be posting the pics...
will be posting the pics...
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Probably a device to put a parallel printer onto a network. Th egate arrary on the board likely does most of the work.
Nice project box...similar, but longer, to the box the Trends TA-10 comes in.
dave
Nice project box...similar, but longer, to the box the Trends TA-10 comes in.
dave
Thx for ur reply, Dave...thats what i thought first..but when i googled (25 DB to Lan) i got a few cable adapters without any electronics..so what does the PCB and electronics do ? a buffering...
Its a nice box though !! very good finish !!
Its a nice box though !! very good finish !!
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T0 be on the network it is going to have to have some smarts... a cable adapter for instance, can't store an IP #
dave
dave
If it was on an ethernet network it would have isolation from it. No pulse transformers visible adjacent to the RJ45 - it appears that port just connects to some of the resistors.
Or even some interface to some router? That looks like a RS232 serial port connector instead, also 15 pin but usually male at the device end (parallel ports are female on the device).
It is possible to make an Ethernet interface without transformers. That is sometimes done to reduce cost and/or size. However, that device appears to be high quality and quite big so I don't see why they would do that.
The way the 25 pin connector is connected suggests it's a device end parallel port. I think it's probably a device that converts parallel to some kind of serial or network interface. If you give the frequency of the crystal and the part number of the chip covered by the sticker, it would help narrow it down.
Make an interface sure, but make it work according to the IEEE spec? No. I've had another look a bit more closely. The RJ45 has 10 pins, all ethernet connectors I've seen only have 8. One pin looks to be being used for power, so this looks like a customized use of the RJ45.
Thanks all for ur inputs..some more details:
Xtal 30.MHZ
14Pin DIL 74HC14N
5 Pin To220 MIC29152BU (LDO regulator)
Chip in socket
"MX"
MX10EXAQC (PLCC)
B)408
IC7396
14GXX
7805 (5volt reg)
few small sig tranistors
Xtal 30.MHZ
14Pin DIL 74HC14N
5 Pin To220 MIC29152BU (LDO regulator)
Chip in socket
"MX"
MX10EXAQC (PLCC)
B)408
IC7396
14GXX
7805 (5volt reg)
few small sig tranistors
This looks like an interface box that converts standard parallel port data into custom format serial data. It could be a microcontroller programmer, a led scrolling display programmer, the interface to some numerical control machine, etc.
The RJ45 does not look like ethernet, telephone or RS-232.
The RJ45 does not look like ethernet, telephone or RS-232.
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