Mikey’s Hobby Workshop on Instagram: "Here’s how I make my Sonics tap to pay. Keep in mind this is very simplified! I will do a in depth write up soon. Every chip needs a coil of copper wire to act as an antenna, which enables it to communicate wirelessly by picking up the signal from the reader. You can strip the chip from any existing pay card by dissolving it in acetone. You’ll see the chip and wire in about 30min. All chips run at 13.56Mhz, to tune your home made antenna, start with some mag