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Hi to all,
In hyperlynx, how can I combine 2 separate pin as 1 component, like R, IC, C, terminal or ... .
in other words I want to merge H1 and H3 pins (atached photo) as one components.
At the moment, this pins are 2 separate pads(in hyperlynx are as pin) for out put of power supply.
The pcb...
yes you are right, I never initiate by zero one's. actually I make some numbers by the function plus some reasonable noise.
so I want any ready source that suited for micro without any unused function that have been writen for pc that make source huge code.
regards
data must be fitted to:
y = p[0] / x + p[1] tanh[ p[2] x ]
and find p[0] , p[1] , p[2]
results all p[] s are zero !
yes I choose initial parameters close to known values(in test program). of course in levmar algorithm even initial parameter be far from, the result are close to best fit.
Hello
I need to to make a curve fitting for measured data from A/D of micro in C. The function of curve is nonlinear and can not be lineared . so I need to use Levmar algorithm to find best fit. I test many source that have been written for pc and match them to micro but were not work and didn't...
the package of any component for example resistors, cap, Tr, IC ... are defined and standard,same and typical according IEEE in all over the world.
have you ever seen a capacitor with resistor shape and numbering,in addition it is most likely to cartoon bee :smile:
but it is true for common type capacitors in pf, nf and uf range.
if really you believe it is capacitance,you think which type of cap meter can measure correctly?
thanks a lot. but I know the procedure of reading.
My capacitance meter is calibrated and no problem for reading! it shows open circuit when it has no cap.I test a red-red-black (value: 22s) one and it is 50pf too.
Actually I think this unknown part is not cap but I don't know what is!
it is...
I measured the capacitance for color code for that one has yellow-violet-brown and printed on board "471S" was 50pf , I remove 3 ones of this component from board and all was the same !!!
ok.I will check it with low range cap meter again.
unfortunately I do not have the schematic of circuit . but generally the board parts are as I comment on board photo,may be helpful.
regards
I have removed all of them and test one by one and measured by cap meter, they are not cap,in addition capacitors on circuit as can be seen from second pictures are polyester type.
here is board photo:
regards.
hello.
I want to repair a car amplifier board and find a new component that I don't know it!
it like a resistor and the same color code. but it has the letter "S" in the end of printed value on board(below the component).
for exaple : RED-RED-Black is device colors and "22S" is printed on board...
You are right.the first time that I had this prblem( I mean screaming of trans ) I knew that the reason is instability because DC was not stable.so after some mounts of searching and study of many books finaly I design feed back loop and it worked well. It was a test circuit for check my...
:roll:
isn't it true that snubber effect is visible in rising edge of cathode voltage of rectifier?!
thanks alot
No the problem is not related to feedback instability and I designed it correctly.actually regardless of this bump the effect of instability will appear in continuously changing of...
yes but it is end solution. how the other power supplies solved this problem, because sic diodes are not available here. I mean how to change trans layers, output LC filter values for L or C or any thing else?! :thinker:
link is not correct
regards
In pressman book it noted that this is related to revers capacitance of rectifiers and out put L filter that make a resonance circuit. Now how to eliminate or reduce this effect? For example same as snubber that reduce resonance effect of parasitic cap and leakage inductance of trans?
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