Posted in Arduino Hacks Tagged arduino, arduino pro mini, Electric Imp, imp, machine, mifare RC522, NFC, raspberry pi, Raspi, rfid, vending Finding An Active TX Pin On Cheap GPS January 30, 2015 ...

I designed and made a board for 100 pin PIC24s, dsPICs and PIC32s that exposes all of its IO in a friendly manner with 2,54mm pins, and it’s a bit less than 50x50mm in size.

In the Leonardo, an op-amp between the ATmega pin and the led means that loading is minimal and the pin can easily be used as an Arduino input. This buffer is missing on the Micro, which means even ...