[SOLVED] Mc14495 7 seg display help

Thread Starter

Leetut

Joined Dec 2, 2018
2
I’ve put the below circuit together, lorlin bck1001 reading from 2 eeproms, it works fine,
I’ve also made a circuit for a mc14495 decoder and 7 segment display, it works too,
But after connecting them together, most times the switch/display only operates correctly if I hover my finger above the mc14495 chip,
I’m a beginner so don’t really know what I’m doing wrong, but it did work on a breadboard, someone mentioned power filtering so I read up on that and tried a 100nf ceramic capacitor between 3.3v and ground right next to the mc14495 chip, it didn’t help, any idea what I can try next?

EDF3AFB6-9E22-439F-941D-9A74D235F109.jpeg EC55535A-9B37-4380-82E5-3E10581044E2.jpeg CD7DE8B1-471F-4993-AFB0-3EFEF4024340.png 4F8FB862-B9E3-4E2D-A9FF-460A3E186B9F.jpeg
 

Thread Starter

Leetut

Joined Dec 2, 2018
2
Thank you so much!
Connected pin 7 to 8 and it operates perfectly now, been bugging me since last summer this has, and you guys fixed it in 5mins!
 
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