[Discuss] [possibly OT] Advanced LIRC circuit

[J.Bakshi]

 Dear list,

 I have been using the home brew lirc receiver circuit with my PI machine 
 without any problem. I have upgraded my machine recently with AMD semapron 
 processor with Asrock mother-board. the mother-board has only one COM port. 
The problem is my  receiver circuit is not working with the new mother-board 
where it is working  perfectly with the mother-board of PI. I am using the 
same HDD hence same 2.6.10  custom build kernel with both mother-board & CPU. 
May be the new mother-board fails to  provide the required voltage/current to 
the receiver circuit. Could any one know any  lirc receiver circuit which can 
work with this type of low voltage/current com port ?

I know about http://www.irblaster.info/receiver.html which works down about 
5.2V with about 15mA output from your serial port. But the site does not 
provide any circuit ; only sell the ready made kit.
 
 thanks in advanced.