ฝัง
- เผยแพร่เมื่อ 9 มิ.ย. 2024
- Hello Engineers! In this video, I show you how to use the 7447 BCD Decoder Chip with the 7 segment display.
☑️ Materials
Common Anode Display - amzn.to/2LZI5X2
7447 Chip - bit.ly/7447Decoder
4 Pin Dip Switch - bit.ly/4PinDipSwitch
✅ Resources
Circuit Schematic - drive.google.com/file/d/1uMPz...
7447 Pin-out Explained - • Pin out of the 7447 BC...
☑️ About QRbx
Hi and welcome to my channel! My name is Aary Kieu and I have a B.S in Electrical Engineering. I enjoy working with robotics and will be showcasing some of my projects here. I will also be posting engineering-related tutorials (ones I wished were available when I was starting out in Robotics).
❔ Questions/Suggestions
Feel free to let me know in the comments below. I will respond as soon as I can. Cheers!
I'm deeply appreciative to you!!! I searched videos of 7447 all day but I had never seen anyone perfect explanation like you.
This is the video that i wanted, the shop owner said that the other ics on other vids are sold out and only left this. Best Video! Now i can continue on my project.
The best video on driving a 7 segment display that I've seen. Great Job!
Great video. Thank you.
Thank u so much Man,best explanation.
thank you very much. That is great
Good work. Thanks
Hello, how do I convert binaries to decimals on 7-segment, 5-digit but 16-bit displays? and being that I can only use decoders for the transformation. help me please.
Super clear the way you hooked everything up, thanks!
crystal clear.
Thanks it works 👍
Hello, can you do the same exact circuit in this video using Proteus? I tried it but the 7447 bcd and 7 segment display are different om Proteus so it isn't working.
Thank you in advance
can i use decoder if i need to output somethings other than 0-9? or just can control manually using switch?
Fantastic ❤️
On what basis did u chose the resistor values?
What is the minimum amount of current that can damage the 7 segment display?
Very nice video
can I use this with a 3x4 keypad?
can you post a design of 4 input 7 segment decoder using diode-transistor logic ?
how to connect this in proteus by decoder and the distribution of numbers ?
What type of jumpers wires are used??
Are the resistors 1/4 watts ??
Can i use a 330 ohm resitor instead of 470 ohm resistor and not use the 1k resistor and use 5v supply
I have this hooked up to a 4x4 matrix keypad and a 74C922 keypad decoder that outputs BCD. Since I introduced the 7447 and the 7 segment display, it counts from 0 -9 perfectly, but goes a little crazy after that. What happens if you select a binary 1010 (A) on your dip switch? I would like to get an "A - F" out ???
Hi no it does not display Hex after 9
I haven't found the dip switches anywhere on the market. Can I use 4 3-pin slider switches for inputs?
Yes
Can you reupload the schematic? Your link isn't working
Which type of power supply we should use
Thanks
Hi awesome video but I just want to know what the 1k resistors are for?
Hi I explained it somewhere in the comments below
first think circuit without resistor you switch slider and + connected - directly DOH!
that we call short circuit
resistor is pulldown input down when switch not used and pull it up when used bcoz there one resistor voltage become on that side is positive
if use just + switch -> input. yeah it work perfectly on position, but when you switch off input not go anywhere pin is floating. it can be 0 or 1 we not know and we want it be 0 then. thats why resistor is there pull it down. hope helps xD
Is there a binary coded hexadecimal decoder ic?
Hi! The datasheet and schematic cant be opened anymore, it says error 404
Hi my 7447 bcd has only 15 pin? is it okay?
Is it okay to use 12v supply?
is it okay to use a 9v supply?
if I used different resistors will it work?
The circuit is not available using that link. It is showing some error
How to connect 7 segment display using 74147 chip and 7447 chip can u do it please...
Hey !!!! Could u add a buzzer and LED ?
What is that supply material u given? Cn anyone tell me
would please show the how to use two 7 segment display to get output 15 , in binary 1111
Love u man.Is really helpful
why you connect two common together? is one common enough ?
Can you use 9v batt here?
can a 9v battery as a power source can be used to ligth the led?
i tried it and it did not work as it should.
Try using a higher value resistor if you want to use a 9v battery
me salvaste grasias
Hey, how would I do this with 3 7 segment display decoders?
What do you mean?
will it work with a 7 volt battery?
thanku sir
what is that thing around the switch and those black thing in the jumper wires?
Hi the thing around the switch is a pcb board. The pins of the switch were too short for the breadboard so I attached it to a pcb with male headers so that it would fit securely on the breadboard. The jumper wires are dupoint jumper wires and they come like that when you buy it.
Can I use less than 470 ohm resistor?
I have used ic7446 instead of 7447, I am getting an output only in segment 'g' for all bcd inputs and I did not used Dip switch instead i directly given inputs from +ve and -ve. how can I proceed further??
Hey I have a dip switch that has 5 switch, will it work tho if I use only 4 switch and leave the 5?
Yes
Can I use 9 volt battery instead of 6 volt power supply
Hi
Is it possible to have similar, but for 8 dip switches to 256 addresses?
Hi, not that I am aware of. If you wanted to build one you would have to map out all 256 values all 3 of the seven segment display outputs and use K-maps to derive the necessary combinational logic required. Or just use a microprocessor. Goodluck
Any advice on how to do hex to 7 segment display decoding?
Where is the hex input coming from?
how i can make 7 segment led display 0 where switch is over 9 like (8+2 = 0 or 8+4 =0 or 1+2+4+8 = 0 ) any thing over 9 let 7segment show zero
Can i please get the logic diagram of this?
Friend please explain why do you add particular resistor value and I need basic things about electronics do you help me
Hi which resistors?
how can we connect common cathode?
Is there any change if I use 74LS47 instead of the using 74HC47?
Compare the data sheets between the two to see if the pinouts are similar
is it okay to use a 9V battery supply? also, will this display the no. 9?
Hi the 9v question is answered recently in the comments and yes it displays 0-9.
@@QRobotix thanks a lot!! great video, too!
Can u post the design of digital calculator?
How to calculate the value of the resistance ?
You calculate resistor values for LEDs by assuming a typical LED current of 20mA (0.02A). You know the supply voltage (5V). So Ohms Law, Resistance = Voltage / Current. So Resistance is 5 / 0.02 which is 250 ohms,. Use the nearest standard value - so 220 ohms.
When -ve to vcc,+ve to gnd of battery connected,then only it's glowing but it is showing 8 not 0,please help me in this regard
Hi check to make sure all leds are working on your 7 segment display
Hey bro can you tell me how to make two digits seven segment display from 00 to 15 only
Yeah it can be done using logic gates. I ll make a video on it once I have some time. Really busy with school at the moment.
Can you show me a code that you have programed your pic with
do you have a schematic diagram?
Its battery is 6v and what ampere?
the outputs are only 0-9?
not 0-F?
Hi, i follow your instruction, but why ic 7447 doesnt work? Shoud i replace the resistor?
🤷♂️
Hi may I ask why is my display not changing . Like it's stock in number 8. Is it possible that the problem is in my switch?
and also it suppose to start with 0 right? hope you can help me
@@yoshkyu1134 brother I am currently in the same situation, can you please give me any suggestion on how to make it work ?
How much volt your battery is ?
Sir which IC should be used in this circuit , is it 74HC47 OR 74LS47
either will work
help me on it,
for display 6 I need this orientation (abcdefg=10111111) but we get (abcdefg=00111111), how can we get required bit orientations
Hi you would have to connect the 4 inputs to a 4 input AND gate and use inverters as necessary for the number 6. Then connect the output of and gate to the digit a
Is 74LS47 and 74HC47 IC still the same?
Yes!
Is it okay to use common cathode 7seg for this?
Yes!... BUT you need 74LS48... The display you're talking about won't work with 74LS47
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I’m using a Cd4055 decoder I’m so confused on how to connect it to the 7 segment display
Have you looked at the datasheet? CD4055B has similar pin assignments to the 7447.
can i use decoder for common anode 7 segment?
Yes I am using a common anode display in this tutorial
I did everything like in dmthe video, but it shows only the middle line (minus)
Please can you tell me how to represent A B C D E in the 7 segment display?
If you want to use logic gates then you have to use the Kmap method to design the logic
I want to display them using 7474 decoder
But there is a problem
When we use it the output gives don't cares after number 9 and We want to represent The rest of the hexadecimal number
What can we do?
the input voltage is how many volts???
It can be from 5 to 15 v
can you use a 9v battery as its power supply?
Yes you can. Just make sure you choose an appropriate current limiting resistor for your display segments
I need 7_ segment common cathode
is it ok if i use common cathode.?
Yes just make sure to connect the cathode to ground and not VCC
Where do you place the 470 k ohm resistor
which part of the video?
74 47 chip
it goes to the 7 segment display
Okay
We can use 40 17 ic to this
Can you please show it in schematic
Battery voltage?
What type of battery is used here and can we replace it with some other battery
Hi the most important consideration is the max current rating for each segment. Typically it's about 20mA for leds. For my setup, I used a 6v power supply (4 AA batteries) with 470 ohm resistors. If you use ohm's law, that comes out to ~ 12 mA of current.
@@QRobotix thanks
How to display 8-bit binary number using seven segment display?
Using 8 switches: If you wanted to build one you would have to map out all 256 values of all 3 of the seven segment display outputs and use K-maps to derive the necessary combinational logic.
Agr hum ne sirf 5 tk display krwana ho mtlb 0 to 5 to kesy ho ga?
Someone's playing Mobile Legends at 0:13 hahahaha lol
What does pin 3,4 and5 do?
Ground
Wath about RB ind and LT anx RB out
can i use 9volt battery???
Yes you can. Just make sure you choose an appropriate current limiting resistor for your display segments
what if i use 12k ohm resistor instead of 1k ohm resistor?
There will be no problem if you use them with the dip switch...
can i give the schematic diagram for this circuit sir..please
I just included the datasheet in the description
PinPointECE can u make a pcb design for that sir..thank you
Can you post the design of this circuit
Hi schematics can be found in the description field.
@@QRobotix please reply
@@26avishkarbhoir85 hi it's in the description
why didn't you connect one( 470 ohm) resistor in the common anode instead of these many resistors
Because each number uses a different amount of Led segments. Therefore the brightness wouldn't be consistent
Hey, why is the 6 not displayed properly??? in your experiment even I too tried on Tinkercad but not working for me either... I mean the 6 is not being displayed properly.
What is it displaying?
It is showing 6 without that segment naming 'a'...
where is circuit diagram