Cd4001 NOR gate SR latch

Thread Starter

Maria Fernandez

Joined Feb 1, 2019
11
If I have 1 SR latch all is fine, its when I add the second that I have the issue, bit baffling tbh. Its a simple circuit, I have watched a YouToob vid and he did in the same way, only 1 SR latch though.... ARGHHHH
 

AnalogKid

Joined Aug 1, 2013
12,142
Agreed, its high, green and yellow. They light fine at 10k. Should I try 1k?
You don't need to at this time. While a "standard" LED is not very bright with less than 1 mA of current, it is enough to see if your circuit is working. And because the LED currents are so low, driving them directly with the 4001 should not be a problem. Make a table of the input conditions and the voltages at the gate output pins so we can see what is happening.

ak
 
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jayanthd

Joined Jul 4, 2015
945
Why not post the Proteus simulation file ?

Your circuit behaving like this ? See attached video.

Extract the attched file using winrar 5.x and view the video file in "Windows Media Player" or "VLC Player"

LATCH.png
 

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