A Lightmeter/Flashmeter for photographers, based on Arduino.

Components:

1. Arduino NANO v.3 https://www.banggood.com/custlink/K3Kvbdnnea
2. BH1750 light sensor https://www.banggood.com/custlink/mKDv2Ip1dr or https://www.banggood.com/custlink/GvGvnRNN0e
3. SSD1306 128*64 OLED SPI Display https://www.banggood.com/custlink/DDKmsdAQ6z
4. Buttons https://www.banggood.com/custlink/m3DGAYsnnY
5. 50x70 PCB https://www.banggood.com/custlink/KvvvnybQAP
6. AAA battery Holder https://www.banggood.com/custlink/vK3KsynANN

Thanks @morozgrafix https://github.com/morozgrafix for creating schematic diagram for this device.

The lightmeter based on Arduino as a main controller and BH1750 as a metering cell. Information is displayed on SSD1306 OLED display. The device is powered by 2 AAA batteries.

Functions list:

• Ambient light metering
• Flash light metering
• ND filter correction
• Aperture priority
• Shutter speed priority
• ISO range 8 - 4 000 000
• Aperture range 1.0 - 3251
• Shutter speed range 1/10000 - 133 sec
• ND Filter range ND2 - ND8192
• Displaying amount of light in Lux.
• Displaying exposure value, EV
• Recalculating exposure pair while one of the parameter changing
• Battery information
• Power 2xAAA LR03 batteries

Detailed information on my site: https://www.pominchuk.com/lightmeter/