SIM Reader powered by the serial port

by alandsilva on Thu Sep 17, 2009 5:05 am

Is it possible to provide the vcc power supply from the vcc pin from the serial port?? Thanks in advance
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Re: SIM Reader powered by the serial port

by mtbf0 on Thu Sep 17, 2009 6:31 am

alandsilva wrote:Is it possible to provide the vcc power supply from the vcc pin from the serial port??


there isn't one. signal levels on a serial port are like +/- 10v.
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Re: SIM Reader powered by the serial port

by djfreeman on Fri Oct 02, 2009 1:15 pm

yes you can....


But the current is low, you have use the pin 4 and 5 to the db-9 ang link to 1n4148...or...take tehe vcc from the USB :) or another external vcc.

see my protobard

http://od-lambda.blogspot.com/2009/09/lector-de-tarjetas-sim-por-rs-232.html
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Re: SIM Reader powered by the serial port

by minerva on Sun Feb 14, 2010 10:47 am

This is basically why we invented USB... and that damn RS232 should be banished.
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Re: SIM Reader powered by the serial port

by pstemari on Fri Aug 06, 2010 1:56 pm

minerva wrote:This is basically why we invented USB... and that damn RS232 should be banished.


Get back to us on that after you've implemented a USB packet driver.

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