Dear Sir,
I actually can help you in this project since I have considerable long experience with magstripe readers. I worked in the payment card industry, and have done coding for credit card terminals including VeriFone Omni and Vx terminals. I'm also familiar with MSR206.
I'm not a web-site programmer, and I'm not going to waste your time. I have considerably long experience in hardware programming, and my service is exactly what you need.
Are you going to write on the IC of the ATM card? Which standard cards are you using?
Regards
Rahul