Picture of Building an Infrared Sensor
Here is how to build and Infrared Sensor using the QRD1114 

Step 1: Parts Needed

One of : QRD1114  Light Sensor

One of : 220 Ohm Resistor

One of : 10 K Ohm Resistor

One of : 3 Wire Cable
FranciscoI11 month ago
PulkitS12 months ago

brother, can I use TCRT5000 IR phototransistor instead of QRD11114
Please help

ManiA29 months ago


I want to turn on and turn off my LED table study lamp by moving my hand over a sensor. Hand over tuns on and hand over again to turn off. Do I need a infrared sensor and a flip flap?

What do you suggest? A simple one and as small as possible!!

AgentWolf (author)  ManiA23 months ago

I am really sorry i missed your comment.
I dont have experince with IR sensor and Flip Flop circuit to be able to advise you on it.
Easiest thing that i can suggest would be to use an Ultrasonic sensor to detect if you hand is there or not and it works in the dark.