The Okdo TelePort photoresistor sensor. Its working principle is that photo-sensitive elements convert light signals into electricity signals. The photo-sensitive element varies with the brightness of light. When the light brightness is stronger, the resistance will reduce on the contrast, when the light is weaker, the resistance will rise. Compatible with RJ11 6P6C OKdo TelePort Control boards and expansion shields
Easy to use, high sensitivity, fast response