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This pin is active LOW. The pin-out for the is shown below, and the datasheet is available at here. Using the 7 segments, you can make any decimal digit. When LOW, this feature is not activated. This pin would blank all the outputs if connected LOW or to ground. This establishes sufficient power to the chip. This provides a little over 5ma for each segment.

These pins are all connected to pull-down resistors. Datashet table below summarizes the binary input values to the decimal digit shown on the 7 segment display.

Driving a 7 segment display with a 4511 BCD to 7 Segment Driver

Now controlling a 7 segment display like this is OK, but we can do much better. When LOW, the pin is in strobe mode, meaning it strobes the output to a given device, which in this case is a 7 segment LED display. For example, a on the matches to a on the 7 segment LED display, b matches with b, etc. In this circuit, we will build a BCD to 7 segment display decoder circuit using the chip.


So, for example, if we want to show the decimal number 5, we give a value of to the DCBA data pins. There are 4 data pins hold a binary value.

These are the pins we attach to each of the corresponding pins on the 7 segment LED display. So it simply stores latches or stores the 4511bd without transferring to a device. However, if you do want to use this feature, you can simply connect it to a pull-up resistor with a pushbutton. We can choose what digit we want to display by inputting the equivalent binary value into these data pins.

Your email address will not be published. This calculator will help you figure out the resistor size http: When pressed, it will go LOW and turn off all the outputs.

However, if you want to use this feature in your circuit, you simply connect a pull-up resistor to this pin with a pushbutton. Each segment is identified by a letter as can be seen below as well as the pinout and schematic for reference.


BE Datasheet catalog

Being that we don’t wish to use this feature, we simply connect datsaheet permanently HIGH. What you need to do is select the appriate size resistor which will ensure you still have decent current goiing through the LED without burning it out. These 4 data pins are fed binary values.

Depending on the combination of pushbuttons 411be pressed determines the decimal digit that will be shown on the 7 segment LED display; this is summarized in the table above. Each IC takes a binary number as an input, then outputs the necessary lines to display that number on the 7 segment display.

If the pushbuttons are pressed, they go to a HIGH state.

This is why it’s called binary coded decimal. Board stacking is simply the process of taking 2 or more prototyping boards and fixing The is a pin chip. This is because we want to strobe the outputs to the 7 segment LED display.