This is the phone plug for Lego NXT/EV3. 

This is a driver board for stepper motor with chipset ULN2003. There are four LEDs on the board to show A,B,C,D four-phases working status. It has a 2.54mm spacing header for easy connection.  The size of the board is 2.8x2.8cmx2cm...

This is a code disk for speed encoder. It has 20 grids. The diameter of this code disk is 23mm. It has a D shape hole diameter 4mm.

This is a breakout of U-shape motor speed measurement.   Download: Tutorial

Serial Servo Driver is a servo driver board that can drive up to  8 servos with a  precision of  5us. The communication interface is TTL UART serial port, and compatible with Linker kit interface.   Specification: Number of...

This is a handy potentiometer breakout that can be used to adjust signal level in robotics.

LinkSprite infrared roadblock sensor uses an integrated infrared transceiver.  74LS00 is used to construct a resonator. Adjust the potentiometer can adjust the frequency of the infrared light to be the center of receiver, i.e. 38kHz. Now the...

Flame sensor is only sensitive to the light in the frequency band of infrared and ultrviolet. This breakout board has 3 pins: sensor output signal, power, and ground. The sensor output signal is an analog signal. In an indoor enviroment, the...

LinkSprite  Ball-rolling vibration sensor breakout board use ball-rolling device to detect the vibration or tilt.  There are three pins: Power, Ground and outpout digital signal.

Path tracking sensor uses a reflective infrared sensor (tcrt500). The infrared light is emitted and reflected back to the receiver, it's then inverted by 74LS14 and output to the output pin and the LED. The output signal is a digital signal.  There...

This is a stepper motor with 6-wire and 2-phase.   Download:   Product page       Specification Step Angle (degrees): 1.8 2 phases 6-wire cable attached Rated current: 1.35A Rated voltage: 12V Winding...

Toy Tires - Off Road Off-road Tires: 2.0" Diameter Comes in a pair