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ml at mail.tsaitgaist.info ml at mail.tsaitgaist.infoI found a listing of possible SIM sockets : http://www.mlelectronic.com/sim-card-connectors/sim-information.asp The push-push solution seems to be the best one. It also has a card presence switch, like the credit card size (id-1) generally has. This could make the software more accurate (in the mode menu for example) It's just harder to find in shops. kevin On 24.11.2010 09:17, ml at mail.tsaitgaist.info wrote: > Also, we could add a SC reader mode, using the CCID USB profile. > > I linked the SC output to serial port 1 (to be able to control in and > output separately) > I added NPN transistors to be able to block I/O (for MitM) or completely > separate the output from the input (for emulation,reader) > >> >> regaeding voltage: the sam7 can operate its io pins at either 1.8 or 3.3V. So it would be nice to somehow exploit that ability... though making this automatic is probably too much effort. > > To be able to choose between 1.8v (class c) or 3.3v (class b), there is > a manual switch. The other solution would be to use logic level shifter. > > here the drawing : https://gsm.tsaitgaist.info/SIMtrac/v0.3/SIMtrac.ps > > kevin > >