hi can u please help me iam trying to connect 1 BCD decoder to 2 seven-segemnts. by enabling one 7 segemnt and disabling the other (but the output on the disabled signal stays displayed with no change)
Most 3 and 4 digit LED displays on the market are multiplexed.What you want to do is called multiplexing. It is basically a waste for two digits, the number of chips you will use to multiplex is likely to exceed the number of decoders you are saving. These kind of chips are cheap.
Where it gets interesting is if you are into manufacturing. There a minor difference in price can make a huge difference in costs.
Generally multiplexing is done with 6, 8, or more digit displays.
So why are you trying to save on the cost of a 75¢ chip such as a CD4511?
Is this a school assignment?
Normally the illusion of what you are talking about is created by switching back and forth between two displays quickly enough so that even though one of the displays is dark half the time, the human eye percieves that it is continually illuminated via a mechanism known as POV (persisentence of vision).hi can u please help me iam trying to connect 1 BCD decoder to 2 seven-segemnts. by enabling one 7 segemnt and disabling the other (but the output on the disabled signal stays displayed with no change)
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