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where to put reset

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wannabee_good

New Member
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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MikeMl

Well-Known Member
Most Helpful Member
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
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?
 
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