These are standard 6-pin, 8-pin and 10-pin 0.1" spacing female headers...with a twist! The pins are extra long which means you can use these to stack shields! The legs are 10.5mm (0.42") long, so after the PCB thickness (1.7mm/0.07") you have a height of 8.8mm (0.35").
8 X 8 Grid bi-color LED matrix. Only 1.2" on a side, it is quite visible but not so large it won't plug into a breadboard! 128 LEDs are contained in the plastic body, 64 red 320mcd and 64 green, in an 8x8 matrix.
Make your Pi a little slimmer with this microSD card adapter board. It slides in where the SD card goes but is half the length. Pop in a microSD card for a sleeker machine. The microSD card holder is a push-push type so you can push on the edge that sticks out to remove the card when necessary.
This is a simple breakout board which provides 5V and 3.3 Volts output. This board comes in fully assembled unit to ease your prototyping work. This board is a great stuff to use for bread-boarding as it saves the space for adding the regulator circuitry in your bread board.
The SpikenzieLabs Calculator Kit is an electronics kit that makes a working pocket calculator that can add, subtract, multiply and divide. The electronics has easy to solder through-hole parts. Assembling the case is also part of the fun. It is a stylish set of laser cut acrylic pieces.