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Sensor: BH1620FVC SENSOR
Jaume Olivé Petrus edited this page Oct 30, 2017
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BH1620FVC is an analog current output ambient light sensor.
Features:
- Spectral sensitivity close to human eyes sensitivity.
- Output current in proportion to brightness.
- Supply voltage operates from 2.4V to 5.5V
- Built-in shutdown function
- 3 steps controllable output current gain.
- 1.8V logic input interface
- Low sensitivity variation (+/-15%)
What | Comments | |
---|---|---|
Interface | ADC | |
Read () from sensor | illuminance | lux (*) |
Set () with value () for sensor | gain | 0 = H-Gain mode 1 = M-Gain mode 2 = L-Gain mode |
r1 | Iout R1 resistance value, in ohms. Default value is set to 5600 ohms. Please, refer to the datasheet page 4 for more information about R1. |
|
calibration | Calibration data +/- lux | |
Datasheet |
- The gain must be set according to the illuminance range to be measured (datasheet page 5) through pins 3 and 4.
- Once the gain is set, the programmer must set the gain property. By default the sensor expects an H-Gain setting.
- Adjust r1 value to your needs.
- Once the r1 is set, the programmer must set the r1 property. By default the sensor expects a r1 value of 5600 ohms.
- The programmer can use the calibration property to correct sensor readings that may be influenced by the location of the sensor, such as when the sensor is mounted behind a protective glass.
(*)
lux | Surfaces illuminated by |
---|---|
0.0001 | Moonless, overcast night sky (starlight) |
0.002 | Moonless clear night sky with airglow |
0.05–0.36 | Full moon on a clear night |
3.4 | Dark limit of civil twilight under a clear sky |
20–50 | Public areas with dark surroundings |
50 | Family living room lights |
80 | Office building hallway/toilet lighting |
100 | Very dark overcast day |
320–500 | Office lighting |
400 | Sunrise or sunset on a clear day |
1000 | Overcast day: typical TV studio lighting |
10,000–25,000 | Full daylight (not direct sun) |
32,000–100,000 | Direct sunlight |