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 display will likely handle higher currents than the chip. For the SN7447 it has a maximum pin current of 40mA and the total chip can dissipate 320mW in normal operation circumstances.
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.
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
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
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?
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.
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.
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, 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
It depends on the power source you use. For standard LEDs you want to limit its current to 20 mA do 470 ohm works well. And 1kohm is a good choice for pull up or pull down resistors.
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.
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
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.
Very neatly done project. Noce video! Make more if this type of videos.
Can i use a 330 ohm resitor instead of 470 ohm resistor and not use the 1k resistor and use 5v supply
Are the resistors 1/4 watts ??
my display is not working does the battery with 9 voltage will work or no?
Great video. Thank you.
What do you do with binary numbers 10 thru 15?
On what basis did u chose the resistor values?
What is the minimum amount of current that can damage the 7 segment display?
The display will likely handle higher currents than the chip. For the SN7447 it has a maximum pin current of 40mA and the total chip can dissipate 320mW in normal operation circumstances.
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.
why you connect two common together? is one common enough ?
Thank u so much Man,best explanation.
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
Is 74LS47 and 74HC47 IC still the same?
Yes!
Can I connect common anode through a 470 r resistor to 5v insted of connecting cathode of all segments with 470r resistor
Yup as long as your current output is < 20mA for each segment
Good point, other tutorials show with the one resistor. Helps to save space on the breadboard.
@@QRobotix bro can I take 8 way deep switch or can I make without using switch please reply fast
Good work. Thanks
if I used different resistors will it work?
I haven't found the dip switches anywhere on the market. Can I use 4 3-pin slider switches for inputs?
Yes
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 ?
Why when you ON the pin 04 on Dip Switch it displays 1 on segment?
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!
Hey, how would I do this with 3 7 segment display decoders?
What do you mean?
What if you want to start it in to 4 not 0?
What type of jumpers wires are used??
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
Can I use 9 volt battery instead of 6 volt power supply
Can you use 9v batt here?
How about a sample wiring connection for PPE matrix
Super clear the way you hooked everything up, thanks!
Which type of power supply we should use
Hi my 7447 bcd has only 15 pin? is it okay?
will it work with a 7 volt battery?
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
how can we connect common cathode?
crystal clear.
can i use decoder if i need to output somethings other than 0-9? or just can control manually using switch?
can I use this with a 3x4 keypad?
Can you show the common cathode display circuit and also schematic
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?
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
Hi, i follow your instruction, but why ic 7447 doesnt work? Shoud i replace the resistor?
🤷♂️
the input voltage is how many volts???
It can be from 5 to 15 v
Can you reupload the schematic? Your link isn't working
Is there a binary coded hexadecimal decoder ic?
Why are we using 470 ohm resistors for 7 segment i have also seen other videos they arent using it
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.
Someone's playing Mobile Legends at 0:13 hahahaha lol
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
Thanks it works 👍
The circuit is not available using that link. It is showing some error
Any advice on how to do hex to 7 segment display decoding?
Where is the hex input coming from?
What is that supply material u given? Cn anyone tell me
Good Work ! clapping ...
thank you very much. That is great
do you have a schematic diagram?
can you post a design of 4 input 7 segment decoder using diode-transistor logic ?
Can I use less than 470 ohm resistor?
I did everything like in dmthe video, but it shows only the middle line (minus)
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 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
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.
How much it coast for all please reply I take this project
Should be less than 20 dollars
@@QRobotix can I take any type of 7447 ic please reply
@@26avishkarbhoir85 Should be. Double check the datasheet for the pinouts
@@QRobotix can you tell me exactly which 7447 ic nedded I have to submit the project in 2 days
@@26avishkarbhoir85 yeah it's the 74HC47
Dhanyawad 🙏
sir can i use 9 volt battery instead
Check the datasheet for the max voltage for the chip. You can use the 9v for the 7 segment display as long as you limit the current to < 20 ma
can i use decoder for common anode 7 segment?
Yes I am using a common anode display in this tutorial
Hey !!!! Could u add a buzzer and LED ?
Fantastic ❤️
how to connect this in proteus by decoder and the distribution of numbers ?
Can u post the design of digital calculator?
is it ok if i use common cathode.?
Yes just make sure to connect the cathode to ground and not VCC
How to display dot on it?
the dot indicates the decimal in the number you want to display, so you have to input the BCD/decimal equivalent of that number
Just connect pin 5 (of the display) to Ground if it's _Common Anode_
If your display is _Common Cathode_ then connect pin 5 to vcc
Its battery is 6v and what ampere?
the outputs are only 0-9?
not 0-F?
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
Can you please show it in schematic
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
@@QRobotixhigher values for both the resistors of 1k ohm one and 470 ohm one??
Sir if we get 4 switch rather than dp then how we connect that
Hi same connections. Just put the switches adjacent to each other
@@QRobotix thnx sir
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
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
Battery voltage?
Can i please get the logic diagram of this?
I made the same as you and the 7 segment is not working at all
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
Very nice video
How to connect 7 segment display using 74147 chip and 7447 chip can u do it please...
Why did you use 1k ohm and 470ohm only??
It depends on the power source you use. For standard LEDs you want to limit its current to 20 mA do 470 ohm works well. And 1kohm is a good choice for pull up or pull down resistors.
Hi! The datasheet and schematic cant be opened anymore, it says error 404
What does pin 3,4 and5 do?
Ground
Is 9v dc supply okay?
Yeah just make sure you choose an appropriate current limiting resistor for the 7 segment display
I've tried it already and did the connections exactly but the 7 segment won't turn on.
Does the 7 segment work without the decoder chip?
@@QRobotix yeah, it worked
@@QRobotix I used 4 wires to connect the dc lines and it worked but it lit all the segments instead of just zero figure
Agr hum ne sirf 5 tk display krwana ho mtlb 0 to 5 to kesy ho ga?
Number 9 in binary?
1001
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
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...
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'...
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
Sir which IC should be used in this circuit , is it 74HC47 OR 74LS47
either will work
What are that yellow thing called
What yellow thing? The u-shape jumper wires?
Thanks
How much volt your battery is ?
6 volts
What if I use common cathode?
Connect the cathodes of your 7 segment to Ground
Thanks! :)
apart for connecting the cathodes to ground, would any other changes have to be made?
No, no other changes
How much does it cost to make the project
It depends on what materials you have already. I would say fairly cheap ~ 20 USD
@@QRobotix thank you
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