FYRUS LM

Incident Flash Meter, Light Meter & White Balance for Photography

• Current version : 2.3
• Date : 23 / 09 / 2021

Functions :

1. Flash Metering.
2. Aperture Priority.
3. Shutter Priority.
4. Temperature (White Balance) Reading.
5. EV Reading.
6. Battery Volt & Percentage.

• Aperture : f/1.0 to f/22.
• Shutter : 1/10000 to 50sec.
• ISO : 8 - 4 000 000.

What you need :

1. Arduino Nano v3.
2. SSD1306 Oled Display 0.96" 128x64.
3. BH1750 / BH1750FVI Light Sensor.
4. TCS34725 RGB Sensor.
5. 3pcs Tactile Button.
6. Lipo 3.7v Battery.
7. 5V Step-Up Boost Converter (optional for better performance).

• if ordinary AA/AAA batteries is use, power below 3v will show empty battery. A small modification to the code is needed. I
• Board voltage is based on 5v, your board voltage maybe less than that. Change the value based on your board output (use multimeter) for better accuracy.

Library Needed :

• All library are included in Library folder.
• Please install all the library needed to your IDE.

Button Operation :

• 3 button for Metering | Plus | Minus
• ISO setup : hold Plus + Minus button.
• Priority Mode : hold Metering + Plus button.
• Flash On/Off : hold Metering + Minus button.

ATTENTION!

The Software will store last value metered to EEPROM. Therefor, the second time you press metering button, it actually show the last value stored before. Meter twice to get a precise new value.