The Pololu USB to serial adapter is great for connecting microcontroller designs to a personal computer. The adapter uses 3.3 V signal levels so you can connect it directly to any microcontroller running at up to 5 V without the hassle of an RS-232 to TTL level converter.

This compact carrier board makes it easy to integrate a Sharp GP2Y0A60SZLF analog distance sensor (not included) into your project by providing all of the required external components and a 0.1?-pitch, four-pin interface to the sensor. This version of the carrier board is configured for 3V mode.

Bi-directional Logic Level Converter 4-channel by I2C BSS138

Expansion Kit for 3pi Robot.

This Mini Remote Control IR emits a 38kHz Modulated IR Signal that can be used to Control a Robot or other Electronic Project Across the Room. It has 21 Buttons, including Directional and Numeric Input Buttons.

LPS331AP Pressure/Altitude Sensor Carrier with Voltage Regulator

Tamiya Connector Pack, Female

Kit Chassis Romi from Polulu. Ideal for those who want to develop a remote controlled robot car, line follower, fire engine, etc.

Waterproof DC-DC converter. With input between 16 and 36VDC for 12V and up to 10A of output current.

DC-DC converter waterproof. With input between 16 and 36VDC for 9V and up to 5A of output current.

The 2WD mobile platform for Arduino is a small, low-cost mobile platform for use with a standard Arduino microcontroller . The robot comes as a kit that includes two drive motors, wheels (and rear caster), frame and all mounting hardware . The main structure and mechanical parts of a robot.

ORP (Oxidation-Reduction Potential) is a measure of oxidation capacity and reduction of the aqueous solution. Unlike a pH measurement that follows a logarithmic curve and therefore requires more calibration adjustments, O RP follows a linear relationship and does not need any instrument adjustments as well as electrode maintenance. ORP is a reliable method of measuring water quality and provides the operator with a unique measurement value.

This barcode reader / scanner with CCD camera module is the perfect choice for your OEM design. It brings the benefits of barcode scanning to all types of OEM devices . You can use this cutting-edge scanning technology in projects such as kiosks, medical instruments, diagnostic equipment, vending machines...

This DC motor driver can be used on 4WD mobile robot platforms, combat robots, smart car competition, drive pumps, electric fans, transporters, etc ...

This LED Matrix 24 × 8 display is specially designed for the FireBeetle series. It supports low power mode and scroll display. With HT1632C high-performance LED driver chip , each led has an independent register, which facilitates separate driving. Integrates a 256KHz RC clock, only 5uA in low power mode, supports 16-scale PWM brightness adjustment. This product also works with another Arduino microcontroller like Arduino UNO (same as DFRduino UNO).

This is a DC-DC buck-mode power module, with input voltage range of 3V - 15V and fixed voltage / current at fixed 5V / 600mA . Working frequency can reach 0.5 MHz . The module has high conversion rate and small size, easy to incorporate.

This DTMF Shield is a Dual-tone multi-frequency signaling module decoder for Arduino With it's audio connector you can decode the crazy funny noises common phones make.

Arduino Expansion Shield for Raspberry Pi B - DFRobot

The MQ4 is used in gas leak detection equipment in the consumer and industrial markets, this sensor is suitable for detecting CH4 , natural gas , LNG , avoiding exposure to alcohol, kitchen smoke and cigarette smoke . Sensitivity can be adjusted by potentiometer

WiDo is a WIFI IoT Node development board compatible with Arduino.

This RS232 shield is designed for the Arduino controller and can easily convert UART to RS232 interface.