As you increase the value of resistor brightness of display decreases. Depending upon the value of resistor your 7 segment will glow more or less. You can use resistor value of 220E to 1K. Maximum voltage which it can handle is 2.5V and we are powering it with the supply voltage of 5V. In this we have connected every segment with the help of resistor to drop excess of voltage. Following circuit shows how to use 7 segment displays in common cathode mode. So in this configuration negative lead of all LED’s are connected together and remaining leads used as display. Common cathode display – As we know seven segment display are made by combining 8 LED’s. You can also choose colour of your display. Seven segment display comes different size, user can use according to their requirement like 7.6mm, 10mm, 14.2mm etc.Į. Comes with a industry standard pin out which can be directly referred from datasheet.ĭ. It uses low power for its operation less than 2.5V.Ĭ.
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