Catalog > Electro-Mechanical Components > Relays > Relay Sockets Catalog > Consumer Electronics > Kits > DIY Kits Analogue Ambient Light Sensor using LDR Analogue Ambient LDR Light Sensor BMT AMBIENT LIGHT SENSOR ANALOGUE AMBIENT LIGHT SENSOR USING LDR. 4 PIN , VCC POSITIVE POWER 3.3V -5V INPUT POWER .GND POWER IS NEGATIVE , EXIT SWITCHING TTL SIGNAL DO 17.84 ZAR inc for 1 Each 35 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Photosensitive resistance module has the most sensitive ambient light, generally used for detecting environment immediate of the brightness of the module light, trigger smc or relay, etc. Brightness of ambient light module can not reach the threshold of setting, do exit end of high-level, when light brightness of the external environment of the development of threshold, only to stop output low level. Output port can be directly connects to the single-chip microcomputer, through the single-chip microcomputer for detecting level up and down, so the change in intensity of the light of the test environment. End of output can directly drive the relay module, which can form a light switch – operated. 1 VCC Positive Power 3.3 – 5V Supply 2 GND power is negative 3 Exit Switching TTL signal DO. Using sensitive photosensitive resistance sensor Output signal is clean, good waveform, driving ability, more than 15MA. With adjustable potentiometer to adjust the brightness of the light detection Output Form: DO digital switching outputs (0 and 1) and AO Analog Voltage Output A fixed bolt holes for easy installation PCB Size: 3.2cm x 1.4cm