Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

where to put reset

Status
Not open for further replies.

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
 

Attachments

  • 0-99-two-digit-counter-by-ic-74ls48-74ls90.jpg
    0-99-two-digit-counter-by-ic-74ls48-74ls90.jpg
    111.3 KB · Views: 1,174
Do you want a button to push to clear the counters, or do you want an automatic zero just by applying power?
 
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?
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top