| Electronics > Projects, Designs, and Technical Stuff |
| Portable luxmeter |
| (1/1) |
| michalchoma:
I decided to make luxmeter, which has basic functions: 1. measure lux from 0 to 188000 lux 2. calculate watts/m2 3. charging using USB cabel via TP4056 board Basic sensor is MAX44009, which measure lux. I use Arduino Pro Mini as microcontroller. Totally it cost cca 13 $. Case is homemade. Power consumption - 15 mA. for more info: https://www.instructables.com/id/Portable-Luxmeter/ BOM: BOM: Arduino Pro Mini 5V Link: https://www.aliexpress.com/item/32900144921.html?aff_platform=link-c-tool&cpt=1561145247646&sk=bXMzgNni&aff_trace_key=e76e0b56093c46769687754f1b45f3d3-1561145247646-09449-bXMzgNni&terminal_id=6f16b2047f114c94a07652c7f0a9951a MAX44009 0.045 Lux to 188,000 Lux Range VCC = 1.7V to 3.6V ICC = 0.65µA Operating Current -40°C to +85°C Temperature Range Link https://www.aliexpress.com/item/32828622541.html?aff_platform=link-c-tool&cpt=1561145248451&sk=cjCuaAz6&aff_trace_key=266cb1e077524665b9f9b5a6a4a0c3e9-1561145248451-04838-cjCuaAz6&terminal_id=6f16b2047f114c94a07652c7f0a9951a OLED display Link: https://www.aliexpress.com/item/32835854912.html?aff_platform=link-c-tool&cpt=1561145251180&sk=AgLlWyg&aff_trace_key=6508c50577044f99878cd6dd1342a224-1561145251180-08698-AgLlWyg&terminal_id=6f16b2047f114c94a07652c7f0a9951a Diagonal Screen Size:0.96" Number of Pixels:128 x 64 Color Depth:Monochrome (Yellow&Blue) Dimension:27.8 x27.3x 4.3 mm Working Voltage: 3.3~ 5V DC Power: 0.06W MaxViewing Angle: >160 Degree Duty:1/32Brightness ( cd/m2):150 (Typ) @ 5V Interface: I2C TP4056 input 5V Link: https://www.aliexpress.com/item/32453058256.html?scm=1007.23534.123998.0&pvid=d1322270-c0d1-4618-90a5-d473f8129d86&rmsg=replace_same_item&aff_platform=link-c-tool&cpt=1561145253332&sk=chQVaxXw&aff_trace_key=65dc8d458d7e49df8da75c671b4da2d4-1561145253332-09383-chQVaxXw&terminal_id=6f16b2047f114c94a07652c7f0a9951a Li-Ion battery 3 - 4.2 V Link: https://www.aliexpress.com/item/32807032859.html?aff_platform=link-c-tool&cpt=1561145254057&sk=b65UJ3ZI&aff_trace_key=ef2133d0227b4d26ae8f93359efad4da-1561145254057-05902-b65UJ3ZI&terminal_id=6f16b2047f114c94a07652c7f0a9951a 18650 holder Link: https://www.aliexpress.com/item/32655188466.html?aff_platform=link-c-tool&cpt=1561145255140&sk=2eMn2fW&aff_trace_key=00a8c20d095c4c6d9ac0ad59b7ecb754-1561145255140-08614-2eMn2fW&terminal_id=6f16b2047f114c94a07652c7f0a9951a Switch jumper Link: https://www.aliexpress.com/item/32926003235.html?aff_platform=link-c-tool&cpt=1561145256531&sk=l9e8zgU&aff_trace_key=36fa6729048847cb82357319cea58e85-1561145256531-06541-l9e8zgU&terminal_id=6f16b2047f114c94a07652c7f0a9951a Dupont cable a pin headers Link: https://www.aliexpress.com/item/32880831392.html?aff_platform=link-c-tool&cpt=1561145261370&sk=cO5PqFE0&aff_trace_key=e56f57066b454a3a81a5d6d453a3f9ae-1561145261370-04817-cO5PqFE0&terminal_id=6f16b2047f114c94a07652c7f0a9951a pin headers Link: https://www.aliexpress.com/item/32693979288.html?aff_platform=link-c-tool&cpt=1561145262638&sk=cg9p8QKc&aff_trace_key=731de03d832c47dbafb76b91b302a3fe-1561145262638-06851-cg9p8QKc&terminal_id=6f16b2047f114c94a07652c7f0a9951a Circuit: You need of course 5V Arduino to power it with Li-Ion battery (4,2 V!) --- Code: --- // OLED display TWI address #define OLED_ADDR 0x3C Adafruit_SSD1306 display(-1); // restart display with reset button on arduino void setup() { Lux.Begin(0, 188000); display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR); display.clearDisplay(); display.display(); // display a line of text display.setTextSize(1); display.setTextColor(WHITE); display.setFont(&FreeSerif9pt7b); display.setCursor(1,15); display.print("MAX44009"); display.display(); } void loop() { lux=Lux.GetLux(); // get luxs watts =Lux.GetWpm(); // get watts/m2, only for SUN source display.fillRect(1, 20, 100, 100, BLACK); // create black rectangle on values position display.setCursor(1,40); display.print(lux); display.setCursor(80,40); display.print("lux"); display.setCursor(1,60); display.print(watts); display.setCursor(80,60); display.print("W/m"); display.setCursor(115,55); display.print("2"); display.display(); delay(1000); } --- End code --- Photos: Charging Night pollution? |
| kathy:
Look good, the next time, you could consider the 0.96" oled display with dual colors here: https://www.szmaclight.com/product/0-9-6-inch-oled-display-module-4-pins-I2C-Arduino.html The same I2C interface, with blue and yellow dual colors. |
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