4-bit Binary Count Display on 2 dual displays

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sala

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Hi,
I am running a 4-bit binary count using a 555 timer, could someone please tell me how to use a decoder for each and two dual 7 segment displays to display the counts.
I have thought about it for a while, but havent found a way to do so.
If you have a schematic to share, that would be helpful.
Thanks!
 

hi sala,
The problem is the 'binary counters' ie: 0000b to 1111b ['0' to 'F']
The standard 74LS247 decoders are BCD to 7segment LED decoders, 0000b thru 1001b [ '0' to '9']

You either need quite a number of logic gates or a programmed PIC.

If you used 'decade counters' you could use 74LS247 decoders
 
Last edited:
If you want a decimal display then you would need to convert binary to BCD, which is a complex task. Use a decade (BCD) counter instead as ericgibbs suggested.
 
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