There is only one transistor in my circuit so what is Q2?Sometimes Q2/ can not change status.
There is only one transistor in my circuit so what is Q2?Sometimes Q2/ can not change status.
I'm having a problem reading those files.
Just use the Upload a File button to upload them directly to your post without zipping them.
Q2/ is pin12 of U2 ,Q1 is pin1 of U2There is only one transistor in my circuit so what is Q2?
? Clock 2 is tied to PWR ButtonThe upload file is some waveform.
Channel 1 yellow is PWR_BTN
Channel 3 Red is Q1
Channel 4 Green is Q2/ STB_CTRL
Sometimes Q2/ can not change status.
If I zoom in the waveform.
I found some glitch on Q1, so STB_CTRL change unnormally.
I do not know why there is glitch on Q1?
Suspicious how?your schematic is somewhat suspicous
LTspice, as stated in post #2.what's your simulator
i forgot to change it back after realizing how your thing worksAlso your change to the CLR input for A2 means the it will power up with the output transistor on.
Why did you change that?
i missed you use CD4000.lib ((← i never used that so -- along other stuff it a bit confused initially how you got it to work . . . with your setup))LTspice, as stated in post #2.
you might be rightI don't see that your change for the CLR input makes a difference.
I use TI 4013BM? Clock 2 is tied to PWR Button
? Q1 is forced to reset from +5V (Reset1 generates an unpredictable disruption to outp Q1 = Low )
? ↑ is this the circuit you measure ↑ (chk your circuit wiring + logic + relative controls timing)
? What kind of supply (+filter caps near CD4013) and what is the probe
there is no functionality you describe
= provide a correct circuit you measure with scope !!!
I do not use 0.1uF on the power supply of CD4013.Do you have a 100nF decoupling capacitor directly across the power to ground pins on the CD4013?
The problem is Q1 toggle change,so Q2/ also toggle change.Q2/ is pin12 of U2 ,Q1 is pin1 of U2
Please see the attached circuit in the above post.
Channel 1 yellow is PWR_BTN
Channel 3 Red is Q1
Channel 4 Green is Q2/ STB_CTRL
...............
Sometimes Q2/ can not change status.
If I zoom in the waveform.
I found some glitch on Q1, so STB_CTRL change unnormally.
I do not know why there is glitch on Q1?
Could you help to solve this problem?
Thanks
Best regards
The capacitor needs to be connected as close as possible to the CD4013 power and ground pins.I do not use 0.1uF on the power supply of CD4013.
I just go to office now.The capacitor needs to be connected as close as possible to the CD4013 power and ground pins.
Let us know if that helps.
I cutoff the second circuit D flip flop of CB4013B.I just go to office now.
My circuit is as attached file.
C7 is capacitor near CD4013B.
I add another capacitor on VDD of CD4013B.
The result is the same.
The channel 1 Yellow is PWRBTN.
The channel3 Red is Q1 of U2.
The channel4 Green is Q2/ of U2.
I have cutoff the Q2/ to other circuits.
So Q2/ can not be affected by other circuits.
The first 2 picture is normal waveform.
When I push the button, Q1 change to high, and Q2/ toggle.
The last 7 pictures is unnormal waveform.
The Q1 toggle unnormally many times.
So Q2/ toggle because of Q1 toggle.
I do not know why Q1 toggle often?????
I add schmitt trigger buffer before the pin6 of U2.Gave an upvote for #36 -- not because it's essentially correct -- but because you took a stand to more freely came up with your own solution
/// the problem with our help is that we do and find the first thing that may more or less meet your design requirements -- but without knowing the exact details of it -- only you can verify what it is actually to be
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perhaps ..
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by Jake Hertz
by Jake Hertz
by Duane Benson