But, it is pretty evident that we would need more than one 7-segment display to convey any information that is more than one digit. Now we know how to display our desired numeric character on a single 7-segment display. There are two types of 7-segment displays: Common Cathode and Common Anode, here we are using Common Cathode seven segment display. Like if you want the 7-segment to display the number "5" then you need to glow segment a,f,g,c, and d by making their corresponding pins high. So, let us start knowing it.ħ-Segment and 4-Digit 7-Segment Display Module:ħ Segment Display has seven segments in it and each segment has one LED inside it to display the numbers by lighting up the corresponding segments. 7-segments also have the advantage against poor lighting condition and can be viewed from lager angles than a normal LCD screen. LCD suffers from the drawback of having low character size and will be overkill for your project if you are just planning to display some numeric values. Today we will Interface 4-digit Seven Segment Display Module with Raspberry Pi and display Time over it.Īlthough 16x2 Alphanumeric LCD is much more comfortable than 7-segment display, there are few scenarios where a 7-segment display would come in handier than a LCD display. We have already learnt how to use a Alphanumeric LCD and a single segment 7-segment display with Raspberry pi. This is where we prefer to use 16x2 Alphanumeric LCD display or the 7-Segment display. But, it would always be not economical to use a LCD screen with PI for displaying small amount of data. There are many sensors which can detect certain parameters from the real time world and transfer it to a digital world and we analyse them viewing them either in a LCD screen or some other display. All this can be possible only if we know how to make it interact with the real world and analyse the data through some output device. With its high computational power it can work out wonders in hands of electronics hobbyists or students. We all know that Raspberry Pi is a wonderful Development platform based on ARM microprocessor.
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