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Could you provide a little more detail about your circuit? You're more than a little vague about how you have things setup.
They have been around for years.
Palm SPT1800
PDA Scanner
if the PC is supplying the Vcc for the serial device
which pin is responsible for the Supply?
i connected 5v supply to Pin 9 (i am using DB9 connector)
from the readings of multimeter the current drawn by Pin 9 is around 90mA So the barcode reader should be powered up but it doesn't !!
so what's wrong?
Does the device need initialization before it will operate?
I did not locate a data sheet so I can't give specifics.
Mike.
i think not because when i connected it to the pc it turned on immediatly
the datasheet is available in Lefty post in the link.
it a datasheet for all opticon barcode scanners
Do you know if it is programmed to use the handshake lines? If connected to the computer the computer may be asserting one of the handshake lines and allowing the scanner to run. Maybe you need to set the scanner to default conditions to start, or verify how the scanner is setup.
Do you have an rs232 breakout box??
mike.
i configured the barcode reader to the RS232 configuration and default settings(no handshaking).
but still didn't power up from the 5v supply
and i want to know what's the rs232 breakout box?