4000 Series Logic ICs: The 4511 BCD 7 Segment Driver IC

Playing around with 4000 series logic ICs, this is the 4511 a BCD 7 segment display driver. It takes 4bit binary input and outputs to a 7 segment common cathode display. Great coupled with a 4510 BCD counter.
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[@jerril42]

Going through many of your videos, so much great stuff. I couldn't help notice this was published exactly four years ago. Thanks for all your hard work David. Merry Christmas.

[@MYNICEEV]

Awesome. Merry Christmas my friend.

[@DavidWatts]

+Raymond Earle Thanks mate, you too.

[@yautingwong7441]

I once used a 4024 to a 4511 to a 7 segment display using a push button to increment but the display flashes whereas if I used a decade counter instead, it doesn't flicker. Any reason why it flickers when using the BCD counter to driver? or is it down to my board (incorrect resistor, capacitor?)

[@sakshibhardwaj805]

Can we use common anode display here ?

[@Driftload]

I am new to these videos (and electronics) how come the button has the resistor? If I am manually switching the wires instead of using a switch should I put a 10k resistor before the binary input?

[@DavidWatts]

Ignore my previous reply, I didn't look at the circuit just tried to rely on my memory. The resistor on the button is a pull down resistor which holds the input at ground. This is import with inputs on the 4511. They are not there to limit the current but to ensure your pins are not left 'floating'.

[@jeetenderkakkar7570]

Hello sir How to use logic ic

[@tennicktenstyl]

He spells it forty five-eleven. There are 4 digits, 4,5,1 and 1. 4+5=9 and we are left with 11. he did 9/11

[@yakacm]

Like other have said I can't quite follow what you are doing, is the any chance of a link to a hi-res photo of the breadboard or a schematic, same with the 4026. Are you using the 4511B and 4026B, because looking at the datasheet it says that the B versions are buffered and can drive the 7 seg display without resistors.

[@DavidWatts]

Sorry mate, I don't have a high resolution photo of the breadboard. Was the schematic not useful in the video? I believe I had a mixture of B and non-B verisons. I used resistors mostly becuase I don't know what anyone following along has access to.

[@yakacm]

David Watts Thanks, yup the schematic was a lot of help, there was a couple of thinks I could quite work out, probably my inexperience rather than your schematic. I believe that I have it wired up correctly now, but it's still not working correctly, which I think is down to the jumpers I'm using which are crap cheapo things which aren't making contact properly, so the 7 segment display is just constantly display all the numbers in sequence very quickly when i have anything plugged into the pin 1 track (the clock signal) even if i just touch pin 1 with the metal end of the jumper cable the 7 segment display starts going, strangely the only thing that will stop it is pressing the button, I'm talking about the 4026 here BTW.

[@DavidWatts]

diecast jam It could be you need a 100nf capacitor across VCC and GND, but I doubt it. It is probably the resting state of the clock pin. I think the 4026 clock pin needs to be pulled HIGH or LOW, I forget which, with the button triggering the opposite. It sounds like your chips is constant triggering. Does that make sense?

[@yakacm]

I tried putting resistors on pin 1, think I tried 1K and 100k. When I was looking online i noticed someone else saying they had the same issue, ill try the capacitor on Vcc and Gnd, I have another 4026 which i'll try in case I have damaged the one I have on the board now, I'm not that careful about static. Thanks for your help.

[@DavidWatts]

diecast jam These old chips would take a lightning bolt and not skip a beat, don't worry about the static too much. Just don't rub balloons on your jumper while wiring up the circuit. I reckon you just have a few loose connections. The easiest thing is to pull it all out and start again.