Arduino header pins too short - Arduino Playground - InterfacingWithHardware
SainSmart Ethernet Shield W5100 for Arduino UNO R3 MEGA 2560 Duemilanove The header pins are too short, so the board will interfere with components on your Arduino.
PORTD maps to Arduino digital pins 0 code to simultaneously write a bunch of hardware pins simultaneously via the port registers than it would using a for loop.
Arduino Stackable Header Kit Analog section header was too short and the I2C header's female Double Row 3Pins 2. 54mm Arduino Stackable Shield Header.
Don't forget to learn how to use your multimeter too! all of the Arduino pins, and the 2x3 ICSP header is now part of Arduino so the short pins stick
The Arduino Mega 2560 is a microcontroller board based on the header using Arduino ISP or See the mapping between Arduino pins and Atmega2560.
Build and Program an Arduino Drawbot 1x arduino compatible board, with short USB cable Male header pins.