Results tagged #Ir Led in Circuits
infrared extending IR range
Using this schematic I doubled the range of my IR LED, the power drawn in the circuit is now 37mA. My former circuit, without using a NPN tr...
Proximity Detector Circuit
There are 2 ways to build a protximity detector. One is mount the IR LED and the phototransistor so that they face each other. Then the infr...
Speed of Light with an IR LED
The speed of light has been measured many different ways using many ingenious methods. The following note describes a method which is concep...
infra red ir led flood light circuit
The 4049 section is the basic voltage doubler circuit which effectively boosts the 9 V supply to a level of around 15 V which further become...
LED (IR LED1) and the phototransistor (T1) and wireless light switch
The wireless light switch circuit described here requires no physical contact for operating the appliance. You just need to move your hand b...