This video demonstrates using the CD4543 7-Segment Latch/Decoder/Driver IC with a common anode type display. This is a very useful and inexpensive IC that can be used with common cathode (CC) or common anode (CA) displays.
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@clarkso652 жыл бұрын
I have scoured the KZbin for a clear explanation on this chip for 6 years and there you are at long last!!! Thank you so much for sharing this.
@AliKhan-ks4rm2 ай бұрын
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@ukaszgowacki3326 Жыл бұрын
Hi. Why we don't use resistors between the 4543 outputs and the display segments in this circuit. I also studied this system myself and noticed that it seemed to introduce this resistance itself, because adding resistors by me did not limit the current.
@simoncarter568 Жыл бұрын
It seems like this chip will work without resistors
@AnthonyFrancisJones9 ай бұрын
Quite a few of these '4' series display driver chips limit the output current so you do not need resistors - but be careful as they often do. Best to build your prototype on the bread board with them in! Remember if you short a pin on the chip somewhere to the power supply (I have done this many a time) you could be feeding the power supply current directly to the 7 segment display and you will very quickly destroy it! Been there, done that and blamed faulty displays in the first instance!
@milhousesmom2 жыл бұрын
how would you connect a second display for a 2 digit scoreboard?
@simoncarter5682 жыл бұрын
You would need to use a microcontroller. If you want to keep it simple without a microcontroller, see my instructable on making a coin counter, this uses a different kind of counter IC and 7-segment decoder to display on 3 displays at once.