With UV click, you can design devices that warn you of excessive ultraviolet radiation levels. UV click carries an ML8511 UV sensor IC that is sensitive to UV-A (365-315nm) and UV-B (315-280nm) rays. The board can produce a digital or analog output signal that is linearly proportional to the UV intensity it detects (UV intensity is measured in mW/cm²).

Output is digital by default, communicating via mikroBUS SPI (CS, SCK, MISO) lines. You can bypass the on-board MCP3201 ADC if you want to use the ADC on your host microcontroller instead — just solder the A/D Select jumper (zero-Ohm resistor) to the AN position and the board will produce analog output on the mikroBUS AN line.

The sensor can be enabled or disabled by the host MCU through the RST (EN) pin.

Note: UV click uses a 3.3V power supply only. Also, be careful not to press or rub the sensitive surface of the ML8511 sensor IC.

The sensor responds to UV-A and UV-B rays. UV-A makes up to 95 percent of Ultraviolet light we're exposed to, but UV-B is the one causing sunburns. Be careful when experimenting with it.

mikroBUS Click Boards Overview

You also can connect Click boards to many other popular platforms via these adapters:

• PC — Click USB Adapter (MIKROE-1433)
• Arduino — Arduino UNO click shield (MIKROE-1581)
• Raspberry Pi — Pi click shield (MIKROE-1512)
• BeagleBone Black — BeagleBone click shield (MIKROE-1596)
• STM32F3 Discovery — STM32F3 Discovery Shield (MIKROE-1447)
• STM32F4 Discovery — STM32F4 Discovery Shield (MIKROE-1481)
• Stellaris LM4F120 LaunchPad / Tiva TM4C123G LaunchPad — Click BOOSTER PACK (MIKROE-1363)

In addition, it is royalty-free to add mikroBUS to your own designs. Visit the mikroBUS Category to see the full line of Click boards.

UV Sensor Add-on Module Resources

• UV Click User Manual
• UV Click Software Examples for STM32F107VC (runs on EasyMx PRO v7 for STM32) with source in C, BASIC and Pascal
• mikroBUS Specifications
• Lapis Semiconductor ML8511 Page with UV sensor specifications