LCD Gráfico 128x64 STN LED Backlight

The Current Sensor 70A is a great option for those looking for equipment to measure current up to 70A and that is non-invasive.

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

The Grove – UV Sensor is used for detecting the intensity of incident ultraviolet(UV) radiation. This form of electromagnetic radiation has shorter wavelengths than visible radiation. It is based on the sensor GUVA-S12D.It has a wide spectral range of 200nm-400nm. The module will output electrical signal which is varied with the change of the UV intensity. UV sensors are used for determining exposure to ultraviolet radiation in laboratory or environmental settings.

The SparkFun Current Sensor Breakout is a High Precision Card that uses the ACS723 for Moderate AC and DC Current Detection Applications. The ACS723 Sensor uses a Hall Effect Sensor to Emit a Voltage relative to the Current that flows through the IP + and IP- Pins on the Board. The advantage of using a Hall Effect Sensor, specifically, is that the Circuit Being Detected and the Sensor Reading Circuit are Electrically Isolated, which means that although your Arduino is Operating at 5V, the Detected Circuit may be Operating at Higher DC or AC voltages.

Electronic Brick - Sensor de Corrente - Loop 4-20mA

Light Sensitivity Switch Kit, Velleman.

This is a simple to use Light Sensor that outputs an analog value from 0 to 5V.

Basic breakout board for the TEMT6000 Ambient Light Sensor.

SparkFun Luminosity Sensor - TSL2561

The flame sensor can be used to detect fire or another wavelength in light from 760 nm - 1100 nm.

LDR (or light-dependent resistance , or photoresistor ) is a variable resistance. The light falling on the sensor decreases the resistance .

A-Star 328PB Micro - 3.3V, 12MHz

A-Star 328PB Micro - 5V, 20MHz

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.