

The resistance of 20mm GL20528 Light Sensitive Photoresistor LDR changes with the change in the ambient light exposed on the surface of the sensor. As the light on the sensor increases then the resistance across the two leads decreases. Light Dependent Resistor is a type of photocell which finds excellent use in light sensing device application, whether it is automatic outdoor light ON/OFF switch or indoor automatic light switch; moreover, the 12mm LDR or photoresistor sensor works best in both light and dark regions. The photo-resistor is a staple of electronics. If you need a way to sense the level of ambient light, then there is no easier way to do it without an LDR/photo-resistor.
Two Cadmium Sulphide PhotoConductive Cells with spectral responses similar to that of the human eye. Cell resistance falls with increasing light intensity. Applications of this product include smoke detection, automatic lighting control, batch counting, and burglar alarm systems. Furthermore, some of the applications are given below.
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Analog Applications:
Digital Applications:
Other applications:
General Specification | |
Diameter (mm) | 20 |
Spectral Peak | 560 nm |
No. of Pins | 2 |
Dark resistance | max. 2 kΩ |
Light Resistance | 10 – 20 kΩ |
Maximum Voltage(V) | 500 VDC |
Maximum Power (W) | 0.5 |
Response Time ( μS) | 30 |
Shipment Weight | 0.006 kg |
Shipment Dimensions | 4 × 3 × 2 cm |
Please allow 5% measuring deviation due to manual measurement.
The latest price of LDR 20 mm Light Depending Resistor in Bangladesh is BDT 78 You can buy the LDR 20 mm Light Depending Resistor at best price from our RoboticsBD or visit RoboticsBD Office.
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Product Images are shown for illustrative purposes only and may differ from the actual product. |
Reference: RBD-0823
LDR module 4 PIN Operating voltage 3.3V-5V Signal output indicator light. LDR module 4 PIN Able to detect ambient brightness and light intensity Adjustable sensitivity (via blue digital potentiometer adjustment)
Reference: RBD-0995
Diameter: 5mm No. of Pins: 2 Type of Mounting: PCB Through Hole Maximum Operating Temperature: +800°C (Approx.) Dark resistance:1-20 Mohm
Reference: RBD-1512
LDR 10 mm Light Depending Resistor Low-cost sensor device Wide spectral response Use in fire alarms, smoke alarms, control street light Low cost. Ambient Temperature Range. Wide spectral response.
Reference: RBD-2059
LDR 20 mm Light Depending Resistor Low-cost sensor device Wide spectral response Use in fire alarms, smoke alarms, control street light Low cost. Ambient Temperature Range. Wide spectral response.
Reference: RBD-1199
Low-noise output Fast power-on time Ratiometric rail-to-rail output 4.5 to 6.0 V operation Solid-state reliability Factory-programmed at end-of-line for optimumperformance Robust ESD performance
Reference: RBD-1063
Temperature Control Range(°C): -10 to +50 Resolution @-9.9°C to +99.9°C: 0.1°C Resolution @all temperatures: 1°C Accuracy: 0.1°C Refresh Rate(s): 0.5 Supply Voltage(V): 12 Measuring Inputs: NTC10K Cable Length: 0.5 Meter Output Type: 1 Channel Relay Output Capacity: 10A If you need to measure more than 50c please review this product. XH-W1219 Temperature...
Reference: RBD-0720
Temperature detection of the two-dimensional area: 8 × 8 (64 pixels). Digital output (capability of temperature value output). Compact SMD package (adaptively to reflow mounting). RoHS compliant. RoboticsBD
Reference: RBD-0397
Support CAN V2.0B technical standard, communication rate 1Mb / S. Module 5V DC power supply, SPI interface protocol control 0 to 8 bytes long data field. 8MHZ crystal oscillator 120Ω terminal resistance Use High-speed CAN transceiver TJA1050 Impedance matching, guaranteed drive capability, long-distance data transmission, prevent signal radiation The...
Reference: RBD-1751
Detection Gas: H2, Alcohol, CO, VOC Detection Range: 10~500ppmH2 5~500ppm Alcohol 10~500ppm CO Air Quality Sensor Module
Reference: RBD-0411
Low current consumption (typical 30 mA) CW or pulse operation Flat profile Long detection range (20 m) Supply voltage: 4.75V to 5.25V X-Band Frequency: 10.525 GHz Minimum Power Output: 13 dBm EIRP. RoboticsBD
Reference: RBD-0429
High precision determination accurate to 1 Lu for different lights Operating Voltage: 3-5VDC Built-in 16bit A/D converter I2C interface
Reference: RBD-1203
Distance measuring range: 10 cm to 80 cm Output type: Analog voltage Output voltage differential over distance range: 2.05 V (typical) Update period: 38 ± 10 ms
Reference: RBD-0414
A probe by new original installation import DS18B20 temperature sensor chip. RoboticsBD Chip each pin use heat shrinkable tube to prevent short circuit, internal sealing glue, waterproof, moistureproof. Stainless steel tube encapsulation waterproof moistureproof prevent rust. Stainless steel shell (6 * 45 mm), lead length 100 cm (shielding wire) use...
Reference: RBD-2141
Rating contract (Max.): 10 W Switching power supply (Max.): 110VDC Resistance contract (Max.): 100 Ω Appro. Float Ball Size (mm) : 24×17 (LxD) Body Total Length (mm) : 85 Cable Length (cm) : 37 Total Float opening: 70° Switch ON/OFF angle Approx. betn 15° to 20°
Reference: RBD-1196
Photo Detector, IR Filter, Preamplifier and PCM frequency filter in one package Shielding against EMI or RFI interference CMOS and TTL Compatible Active Low Output Immunity against ambient light Low Power Consumption Able to transfer data continuously up to 2400bps Supply Voltage : 4.5 – 5.5V
Reference: RBD-0222
Sound pressure level: 85DB 10cm The input voltage: 30vp-p max Ultra-thin and lightweight Low power consumption for voltage type Operating Temperature: -20~70 Storage Temperature: -30-80 Clear sound
Reference: RBD-0673
Detecting range: 300~10000ppm Signal output indicator. Dual Signal output (analog output and TTL output). The TTL output signal is low level, allows us to connect with SCM directly. Analog output 0~5V voltage. Quick response and recovery. RoboticsBD
Reference: RBD-1974
Brand: DFRobot
One-click learn Machine Learning Enabled Onboard Screen Extreme Performance
Reference: RBD-0693
Operating Voltage: 3-5.5V Supply Current: ≥ 20mA Optimal Sensing Distance: 3mm Working voltage of 5V, the output of the black line low, white line of high output Uses Infrared Light to Detect Anti-Interference Ability Sensors to adopt TCRT5000 High Sensitivity, Stable Performance Exquisite workmanship, with the indicator Has a fixed bolt hole for easy...
Reference: RBD-0307
Operating Voltage(V): 3- 5 Operating Current(mA): 2 Communication protocol: I2C Power saving mode Automotive grad Small size, low cost. RoboticsBD
Reference: RBD-1193
Infrared Photodiode Transmitter 3mm Infrared Photodiode Receiver 3mm
Reference: RBD-2089
Consists of a mercury switch 680Ω resistor LED that will light up when tilt is detected.
Reference: RBD-1022
Main chip: LM393, Electret condenser microphone Working voltage: DC 3.3-5V Induction distance is 0.5M Signal output Indication Single channel signal output The output effective signal is low level.
Reference: RBD-2235
Sound pressure level: 85DB 10cm The input voltage: 30vp-p max Operating Temperature: -20~70 Clear sound Ultra-thin and lightweight Low power consumption for voltage type
Reference: RBD-0493
Temperature Range : 0C-400C Shield Material : Metal Total Length(Approx.) : 2M / 6.6 Ft; Weight : 46g;
Reference: RBD-0415
Has a signal output instruction When the output valid signal is high, the light goes out The sensitivity is adjustable (fine-tuning) The wide detection range of vibration, no direction With mounting holes, firmware installation is flexible and convenient. RoboticsBD
Reference: RBD-0686
Supply voltage 5-30VDC Detection distance 10mm (effective detection distance 0-10mm) Load current 150MA (no more than) Output form NPN three lines
Reference: RBD-1190
Temperature Coefficient Type: NTC Thermal Time Constant: 10s Resistance 10kΩ Tolerance: ±1% Maximum Power Rating: 75mW Maximum Operating Temperature: +150°C Minimum Operating Temperature: -80°C Dimensions(dia.): 2 mm Length: 30mm Application: Compensation, Control, Measurement, etc.
Reference: RBD-1206
Scanning Range: 18M Radius Detection Range: 12M Radius 4cm Ultra-thin Ideal for all kinds of service robot. 8000 times sample rate, the highest in the current economical LIDAR industry 360-degree laser range scanning Low Noise, Brushless Motor New Non-contact Drive OPTMAG Original Design, prolong the life-span Class 1 Laser Safety Standard High-speed...
Reference: RBD-1202
3-axis magnetic electronic compass. Precise heading information. Operating Voltage: 3 -5 V DC. Driver Chip: HMC5883L / QMC5883L Communication: I2C protocol. Measuring range: ± 1.3-8 Gauss.Library: https://github.com/keepworking/Mecha_QMC5883Lhttps://www.arduino.cc/reference/en/libraries/qmc5883lcompass/
Reference: RBD-1654
5 In 1 Portable CO2 Detector Air Quality Detector Intelligent Air Detector Temperature and Humidity Sensor Carbon Dioxide Monitor TVOC Formaldehyde Detection HCHO Detector Color Black
Reference: RBD-2152
Human Presence Radar LD2410 Respiration and Heartbeat Monitoring Non-contact Induction Sensor High-sensitivity 24GHz sensing module
Reference: RBD-2125
Phototransistor output No contact surface sensing Miniature package
Reference: RBD-0768
Size: 5mm Color: RED Head Shape: Round Lens Appearance: Transparent
Reference: RBD-0665
Operating voltage: 5V Provide both digital and analog output Adjustable sensitivity. RoboticsBD Output LED indicator Compatible with Arduino TTL Compatible Bolt holes for easy installation
Reference: RBD-0376
Current Sense for each motor. RoboticsBD Heatsink for better performance. Power-On LED indicator. Double H bridge Drive Chip: L298N. Operating Voltage(VDC): 5~35 Peak Current (A): 2 Continuous Current (A): 0-36mA No. of Channels: 2 Over-Current Protection (A): Yes Thermal Protection: Yes
Reference: RBD-1902
BC549 Transistor Transistor Type: NPN Package/Case: TO−92 Straight Lead
Reference: RBD-0433
5V power supply. Serial I2C control of LCD display using PCF8574. RoboticsBD Backlight can be enabled or disabled via a jumper on the board. Contrast control via a potentiometer. Can have 8 modules on a single I2C bus (change address via solder jumpers)address, allowing.
Reference: RBD-0023
Wide Working Voltage Range: DC 4.5V- 20V Current Drain: <60uA Detection Angle: <140° Detection Distance: 3 to 7m (can be adjusted) Blockade time: 2.5s (Default) Work temperature: -20-+80°C
Reference: RBD-0145
Dual output mode, analog output more accurate A fixed bolt hole for easy installation With power indicator (red) and digital switching output indicator (green) Having LM393 comparator chip, stable. Operating Voltage: 3.3V~5V
Reference: RBD-0337
Detection depth: 48mm Power: 2.0V ~ 5.0V Dimension: 19.0mm * 63.0mm Mounting holes size: 2.0mm