where to put reset

W

wannabee_good

New Member

• Jun 18, 2009

• #1

can somebody teach me how can I reset this to 0 when i open it is always start on tt or sometime 88.This is the diagram

 

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• 0-99-two-digit-counter-by-ic-74ls48-74ls90.jpg

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MikeMl

Well-Known Member

Most Helpful Member

• Jun 18, 2009

• #2

Do you want a button to push to clear the counters, or do you want an automatic zero just by applying power?

 

Boncuk

New Member

• Jun 19, 2009

• #3

To reset the 74LS90 you must connect pins 2 and 3 (MR1, MR2) to VCC.

For a power on reset use an RC circuit.

Thailand?

 

W

wannabee_good

New Member

• Jun 19, 2009

• #4

thanks. I will try your suggestion.