craigarro
Newbie level 6
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- Jun 13, 2007
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hi all,
just wired up two seven segment displays through two 74ls90's and two 74ls47's now the first circuit increments right through to 9 then resests to 0 but the second increments every 2??? so i get 01, 02, 23, 24, 35, 36, 47 ,48 etc etc. also when the circuit powers up it starts at 04???????? aghhh anyone help much appreciation!!!!!!
Added after 39 minutes:
great figured out what was wrong with the tens incrementing every other!! i had pin 12 of the 74ls90 hooked up to its brother when it should of been pin 11!! doh!!!!!!! BUT i still cant get it to power up on 00. anyone???
Added after 9 minutes:
hmmmm yeah im gona try!! cheers
just wired up two seven segment displays through two 74ls90's and two 74ls47's now the first circuit increments right through to 9 then resests to 0 but the second increments every 2??? so i get 01, 02, 23, 24, 35, 36, 47 ,48 etc etc. also when the circuit powers up it starts at 04???????? aghhh anyone help much appreciation!!!!!!
Added after 39 minutes:
great figured out what was wrong with the tens incrementing every other!! i had pin 12 of the 74ls90 hooked up to its brother when it should of been pin 11!! doh!!!!!!! BUT i still cant get it to power up on 00. anyone???
Added after 9 minutes:
hmmmm yeah im gona try!! cheers
