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Responds to white light. Detects upto 10,000 Lux (50 mW/cm2) within a 180°-wide cone field of view. Check the Flash sensor for a narrow field of view, faster response and larger spectral range. See this videoclip
for a demo !
Application examples
- Measure room or ambient lightning.
- Put fish in a bowl with lights below and let the fish shadows play music (fish not included).
- Combine with the Air sensor and
Hot&Humid to create a full-blown climate control system.
Add Switches
to control water valves.
Technical specifications
| Product |
Light sensor |
| Version |
1.3 (May 2009) |
| Sensing parameter |
ambient light, illuminance |
| Sensing method |
CdS photoresistor |
| Active volume |
180° cone |
| Spectral response range |
approx. 515 to 730 nm ie. visible light |
| Illuminance range |
10,000 Lux (50 mW/cm2) |
| Response time |
n/a |
| Output resistance |
more than 1 MOhm (0 Lux) to 10 KOhm (10,000 Lux) in parallel with 4.7 KOhm |
| Calibration |
| Lux |
mW/cm2 |
Voltage (use 5 V power supply) |
7-bit MIDI value (use 'no processing' editor preset) |
| 0 |
0 |
0.00 |
0 |
| 61 |
0.31 |
0.55 |
14 |
| 80 |
0.40 |
0.83 |
21 |
| 110 |
0.55 |
1.57 |
40 |
| 140 |
0.70 |
1.65 |
42 |
| 280 |
1.4 |
2.52 |
64 |
| 390 |
1.9 |
2.95 |
75 |
| 490 |
2.5 |
3.31 |
84 |
| 520 |
2.6 |
3.62 |
92 |
| 640 |
3.2 |
3.90 |
99 |
| 840 |
4.2 |
4.13 |
105 |
| 1,900 |
9.5 |
4.49 |
114 |
| 7,800 |
39 |
4.80 |
122 |
| Power supply |
1.0 to 10 V DC, 0.2 mA at 5 V |
| Operating temperature |
-55° to 100° C (-67° to 212° F) |
| Sensor dimensions |
18 x 11 x 5 mm (0.71 x 0.43 x 0.2 inch) |
| Weight |
15 g (0.5 oz), incl. cable |
| Cable |
1.0 m (39 inch), shielded, red wire = power, black wire = ground, white wire = sensor output, maximum extension 30 m (98 ft) |
| Connector |
male plug with 3 pins in a row spaced 2.54 mm (0.100 inch) |
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