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BillyT
modified 9 years ago

Exit Delay II

6
30
242
06:10:08
Change the RC values to adjust the delay time. This circuit has been updated from Version I, after an input from lenzrulz, my main aim is to have no circuit current draw after the it has armed, and also to give no indication of its operational presence.
published 9 years ago
2ctiby
9 years ago
Very nice...you could alter the VTO of the Pmos to approx -2v to match standard datasheets but your present setting works just the same for this switching here. Likewise with any Rds alterations. Good use of keeping the left Nmos Source fixed to the zero rail (so that Vs being 0 means that Vgs=Vg...then the Nmos Vg simply needed to rise above the VTO without any extra Vload to consider in order to control the Pmos thus turning it on by pulling its gate to zero). Back EMF caused by the capacitance of the LED can be a problem which may often be overlooked. The LED that you are using there has some concern ...Highlight the far right Nmos drain and throw your switch back and forth....you will see that you are getting about 55V spikes there. An ordinary lamp eliminates that problem...but you may want to keep its power down to say 30mW instead of matching the other lamp. If you really prefer an LED there, then you may need an extra component etc to deal with that 55V.
BillyT
9 years ago
2ctiby thanks for the feedback, my knowledge isn't that deep, the lamp would be an area lamp, the led would be in a touch plate or switch. Would a flywheel diode fix the led problem or is there another fix to look at?
2ctiby
9 years ago
Putting a flywheel diode across each of the lights seems to do the job nicely here on EC, but the extent of my knowledge on this is possibly no further than yours. I look forward to feedback if you get it up and running...it looks good.
hurz
9 years ago
@BillyT, dont be afraid, back EMF from capacitors does not exist and is an invention/phantasy by Mr 2cent.
2ctiby
9 years ago
@BillyT  If someone sensible can simply explain why we get the 55v (potential difference / electrostatic electric field due to charge separation / emf or whatever the correct term may be) with an LED but not with an ordinary lamp, which appears to be resolved by a (backward direction) diode, then I am happy to be corrected for making a wrong assumption....or perhaps it is just a wrong phrasing if we wish to stick to magnetic field of say a coil rather than electric field for that reversed voltage . Whatever the 'correct' explanation is, it is a pity that Mr obnoxious-smug always appears without any kind or valid explanation....and notice there was no explanation about his shoot-through in his recent cmos setup....he will probably keep quiet on it or dream up yet another side-track or abuse to avoid ever admitting that he is not the ultimate all-knowledge authority in everything...Hurz crawls out of the woodwork yet again.
hurz
9 years ago
Mr messy in nasty action. Again, try to understand what subsampling is, idiot. And better dont talk about your latest messing attact were you randomly tuned a filter... Again, being rude does not help you to understand electronic.
2ctiby
9 years ago
Still avoiding admitting your error and lack of understanding of shoot-through in cmos Hurz..you are an obnoxious pathetic joke. I said that I would not go in to next year for a long haul of being drawn in to your hatred and abusive arguing...and the year starts now...don't expect any more replies from me.
hurz
9 years ago
You talking about "shoot-through" and nobody knows what you mean. But this seems to be the strategie. Talking bullshit to hide your zero knowledge? The original poster was asking for a filter! I made a perfect filter. You came and messed it up!
hurz
9 years ago
Here a professional filter and your messy one http://everycircuit.com/circuit/5515744679034880
2ctiby
9 years ago
Final note Hurz...shoot-through is where the top and bottom mosfets in a cmos are partially open at the same time during their opening/closing procedure. That allows current to pass directly through both mosfets as a short circuit eg directly from top to bottom rails to greater or lesser extent depending on each mosfet's timings. It can be prevented and adjusted for in EC settings so that users can develop their circuits and simulate the non-short circuit of a well designed board which probably contains a ready made ic etc which has been designed to avoid that short-circuit shoot-through (using extra switching circuitry so that there is no dual mosfet opening throughout the normal cmos switching procedure)...trying to add such extra circuitry every time we use a two mosfet cmos on EC is not practical...but that does not mean that we should ignore it and allow a direct short to occur, since that would alter the current flow in other parts of the EC schematic. Your lack in this area caused you to not see it, and so led you to filter out events which should never have occurred, had there been no shoot-through...my 'filter animation' was not about an after event filter, it was a diagram to highlight the short-circuit flow. Now if you were to stop calling people idiots etc and start discussing in a sensible manner, then it would be better for all, but I am not going to chance another year of hopefull difficult effort with you.....I need an assurance from you that you would like to see reason...else I will just have to leave you to pick on others.
hurz
9 years ago
But you idiot have to understand it wasn't the topic! You learned/saw a new effect. But the OP talked about the filter. Idiots like you better shutup. Dont tell as back EMF caused by capacitors. Dont demo deadtime mosfet driver by messing filter coeffizients. Idiots like you are irritating other users who are really wants to learn something. Frauds like you are not welcome
hurz
9 years ago
Better continue here were the original filter request was, idiot http://everycircuit.com/circuit/4569825414479872
hurz
9 years ago
And for this thread here tell us were is the back EMF, idiot http://everycircuit.com/circuit/5031253594341376
2ctiby
9 years ago
@BillyT ... I think that Mr angry is basically saying that the seen 55V does not exist outside of EC. He may be right...I don't know...best try you design cautiously on the board and look there with a meter for interest.....pity he could not just say simple kind words to that effect in the first place without all this bother.
hurz
9 years ago
Pitty you dont stop recommend thing you have no idea what you talking about. Fraud
2ctiby
9 years ago
@BillyT ... so still no straightforward detail for you from Mr big about that 55v, only an oscilloscope setting turned to 20us which he delights in calling subsampling....perhaps he will tell you after he has counted all his burnt out mosfets due to shoot through, the error of which which he still can't cope with having made longterm.
hurz
9 years ago
I spend quite some effort in the past to explain this effect. The last time http://everycircuit.com/circuit/6395445273690112 also you idiot were invited to listen. Never saw you got it. Clear for me you are not here to learn. You know already everything. See how you messed up this thread. "... back EMF from capacitance..." No words
2ctiby
9 years ago
Now what about your ongoing idiot error of shoot-through which you admit here to never having heard of and are still in denial about.
hurz
9 years ago
Open a new thread and call it "deadtime" idiot
hurz
9 years ago
And for an practical example check this http://everycircuit.com/circuit/4840894234099712 Idiot
2ctiby
9 years ago
Complete diversion...talk about your error in shoot-through now! ....you have never, ever admitted having an error or not knowing an aspect in electronics....admit it here and now or be taken by one and all as the bullshit con-man that you are. You sit at your house alone as an aged idiot scouring the internet day and night so that you can come back as a know- all authority in every aspect. We have sussed you out. Your days are over convincing young guys that you are a great authority. Buyer beware...he knows things because he has checked the weaknesses in your presentations....then he comes back looking like a great master to encourage you to praise him whilst putting you down. He is out to ensure that you never learn....in case you end up knowing more than him. He is hateful and abusive and needs banning from this EC.
hurz
9 years ago
You see, you are not talking about electronic. Begin of this thread you tried sound like an expert but failed with "... back EMF from capacitance ..." shit happens idiot
2ctiby
9 years ago
Shoot-through explanation of you error?...have you ever made an error?
hurz
9 years ago
To talk to you is waste of time or an error? See you in 2017 idiot
2ctiby
9 years ago
Again...have you ever made any error in electronics ?
Supermario_jj
9 years ago
Stop hatin and lets start lovin people. We should heal the world and make it a better place. 💓
Robert_Kidd
9 years ago
Now, let's heal!
2ctiby
9 years ago
All the Hurz subsampling jargon with oscilloscope adjustments and non-working schematics....can be more easily avoided .....adjust the culprit LED capacitance setting to be 10nF instead of its default 5pF ...it seems to solve that EC 'increased back voltage' (which I casually called a back emf....to be forever used against me)....I just found that work around with messing. Flick the usual switch on and off to see the EC LED far right high volts reading problem alter when the LED capacitance is adjusted....perhaps an easy workaround for the EC 'sub sampling' problem. http://everycircuit.com/circuit/6384303718268928 Much less elusive back voltage created by the EC LED with its now altered capacitance setting of 10nF The schematic appears to contiue working fine after the alteration.
hurz
9 years ago
Sure, if your sim configuration does cause idiotic results, we are changing the circuit by adding capacitors to cut higher frequencies which caused your problems within simulation - Well known jargon 'subsampling'. Engineering is only a little messing, but more of reading and understanding. Try to understand what subsampling mean instead of doing bad propaganda for yourself.
Addramyrz
9 years ago
So i heard Trump won...

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