- Light Emitting Diodes Leds Led Vs In V Trouble Shooting Use Just The Visible Variables To Solve The Questions 9 3 2 1 (77.86 KiB) Viewed 32 times
LED Vs in (V) Trouble shooting 7 Use just the visible variables to solve the questions 3 2 LED colour B Troubleshooting The troubleshooting table shown in figure lists the voltage values at each respective circuit point and the condition of the diode D1, for circuit troubles T1 through 78. The first row displays what values would be found under normal operating conditions. Anode Cathode H Cathode Anode 5mm Round LED LED Pinout How to Use a LED? R LED Vs LED The forward voltage require to turn ON a LED, depends on the color of the LED. If you are feeding the exact value of forward voltage then you can connect a LED directly to the source. If the voltage is a higher than use a resistance in series with the LED, to calculate the value of the resistance use formula: R. (Vs - VLEDX) / ILED Where Vs is the supply voltage VED is the forward voltage of LED X is the number of LED connected in series ILED is LED current
Check the below table for forward voltage of the LED according to its color LED Color Forward Voltage Red 1.63 -2.03V Yellow 2.10 - 2.18V Orange 2.03 - 2.10V Blue 2.48 - 3.7V Green 1.9 - 4.0V Violet 2.76 - 4.0V UV 3.1 4.4V White 3.2 3.6V IR333-A Max. Units Min. 7.8 Typ. 20 85 mW/sr 750 -- EVERLIGHT Technical Data Sheet 5mm Infrared LED, T-1 3/4 Electro-Optical Characteristics (Ta=25°C) Parameter Symbol Condition 14-20mA 11-100mA Radiant Intensity Ес Pulse Width 100/4 Duty 1% I=1A Pulse Width 100S,Duty 1%. Peak Wavelength ap 1-20mA Spectral Δλ I=20mA Bandwidth I20mA I=100mA Forward Voltage VF Pulse Width S1004s Duty S1% TEIA Pulse Width 100 us Duty S 1%. Reverse Current IR VR=SV View Angle 2 1/2 20mA 940 nm nm 45 1.2 1.5 1.4 1.8 V -- -- 2.6 4.0 10 LLA 20 deg 1