This is just going to be a simple write up on using a sketch I found online for emulating magstripe cards with an Arduino. It will be the basis for future projects involving magstripe cards and Arduino. The project utilizes the Arduino's digital output pins fed into an h-bridge to boost the signal going to the coil and make for more reliable emulation. Though some magstripe cards are 3-Track this device is only capable of emulating a single track, or track 2. The most common readers only read track 2 so this is not so much of an issue. Possible future projects using this may include brute forcing magnetic stripe secured devices.