2.8" TFT Touch Shield for Arduino We've discontinued this version of the shield (which was expensive and difficult to make) and replaced it with a version 2: its got a better price, uses way fewer ...

This is a library for the Arduino IDE that interfaces with the Pololu Dual G2 High Power Motor Driver Shield 18v18, Dual G2 High Power Motor Driver Shield 24v14, Dual G2 High Power Motor Driver Shield ...

[James] states the problem is a tantalum capacitor used to decouple the GSM radio power supply from the main Arduino supply. Tantalum capacitors are great for their low ESR properties.