Tacent 12 Segments Bar graph LED Dial Display Tube Dial LED Light Bar 12 Grid Light Indicator Bar 58*7 LED Column Light

Default green color, other color pls contact us.

Dot matrix modules, dial tubes, flat tubes, etc. are all regularly arranged LED (light emitting ) products, and the commonly used colors are red, yellow-green, emerald green, orange, blue, white and so on.The normal working current of the LED is generally 1mA-20mA. The higher the current, the higher the brightne. Depending on the brightne, the current should be within this range.The forward voltage drop of different colors (commonly represented by Ve) is different, about 1.8V for red, yellow-green, and orange, about 3.1V for emerald green, blue, and white, and the parallel driving voltage of LEDs remains unchanged. For large-sized nixie tubes, the LEDs are connected in series, and the total voltage drop must be multied by the number N of LEDs in series, that is, Vf#N, and the driving voltage must be greater than the total voltage drop of the LEDs to light up.A current limiting should be added to drive the LED to prevent the device from ing out. The value R of the current limiting is determined by the following formula:R= (VCC-Vf*N)/I, where VCC is the power supply voltage, Vf is the LED voltage drop, N is the number of LEDs connected in series, and I is the set working voltageCurrent (unit A, 1A=1000mA), such as VCC -5V, Vf=1.8V, N=1, I=10mA, the resistance value can be calculated to be 320Ω, and the standard resistance can be 330Ω, if it is blue light, Vf= 3. 1V, substitute R=190Ω. The actual s should be based on the working voltage and requiredThe current is calculated according to the above formula.The power consumption of the LED is Pled=Vf*N*I, and the power consumption of the current limiting is Pr=I*I*R, corresponding to the above examplePled=1. 8*1*10mA-18mW, Pr=10mA*10mA*330Ω=33mWThe above calculation is based on a single LED. If N LEDs are lit at the same time, please multy by NThe following is an example of a common LED drive circuit (absolutely prohibit the test without current limiting resistance!!)

Limited

Peak Forward Current (Ifp): 100mAContinuous Forward Current (If): 20mARe Voltage: 5VOperating temperature Range: -30 to +70℃Storage temperature Range: -40 to +85℃