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Answer by periblepsis for Help Finding Transfer Function of High Pass Circuit
Well, first off \$R_{_\text{S}}+\frac1{s\,C_1}\ne\frac{s \,R_{_\text{S}}\,C_1}{s \,R_{_\text{S}}\,C_1+1}\$. Rather, \$R_{_\text{S}}+\frac1{s\,C_1}=\frac{s \,R_{_\text{S}}\,C_1+1}{s...
View ArticleComment by periblepsis on Unpowered LM393 Comparators
You can do better with discrete BJTs. The LED itself, of course, won't turn on when the supply voltage is below its own minimum voltage level. So that's free, after a fashion. Beyond that, it's...
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Answer by periblepsis for Finding transfer function of high-pass circuit
Well, first off \$R_{_\text{S}}+\frac1{s\,C_1}\ne\frac{s \,R_{_\text{S}}\,C_1}{s \,R_{_\text{S}}\,C_1+1}\$. Rather, \$R_{_\text{S}}+\frac1{s\,C_1}=\frac{s \,R_{_\text{S}}\,C_1+1}{s...
View ArticleAnswer by periblepsis for Intrinsic current of the diode, what is its current?
It's not a diode. Just doped semiconductor (silicon.)I'll be using the problem value for \$q\$. Yours is more precise. But I want to keep it simpler, for now.getting an answerThe value of \$n_i=1\times...
View ArticleComment by periblepsis on Low power toggle switch
The LM2596 datasheet from TI appears to say worst case standby current (on/off) is 250 μA over its operating temperature range. 80 μA typical. That's actually a lot compared to what can be done with a...
View ArticleComment by periblepsis on Heater circuit using series resistors
I'm no expert on these devices. But it does sound like the BT136 is overkill for you. You need only low-100's of mW dissipation when on. So smaller packaging would seem possible. The I^2s (fusing) spec...
View ArticleComment by periblepsis on Modified sine wave inverter analysis
@SerkanKaya For the working principles (I haven't wanted the youtube link you provided), you may wish to watch this video on 1950's switching supply. The author is quite thorough on explaining the...
View ArticleComment by periblepsis on Heater circuit using series resistors
@Anonymous Here's a picture of that power dissipation curve as one resistor gradually increases in resistance. I just had to replace 0000 aluminum wiring (in the ground) that had rapidly increased into...
View ArticleComment by periblepsis on How can I calculate loop gain when considering...
@kile This is not hard. But start by asking yourself "What happens to a tiny change of current at the input?" Don't include the feedback effect. Ignore that part. Where does a tiny current change go?...
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Answer by periblepsis for Building SPICE models of optocouplers
Each aspect of an IC, such as the 6N137, has to be considered to make a complete model. It helps to have some understanding of what tools are available within Spice and how to apply each of them to...
View ArticleComment by periblepsis on Dual AM/FM antenna for vintage car radio
AM broadcasting is narrowband and usually strong, or used to be, so just adding an AM loop antenna was usually good enough and didn't mess up the FM antenna reception. The loop wasn't ideal. It has to...
View ArticleComment by periblepsis on How to connect DPDT Push switch?
Just use something like this. They are already built to do exactly what you want. Nothing else to add.
View ArticleComment by periblepsis on How does one connect a DPDT Push switch?
Just use something like this. They are already built to do exactly what you want. Nothing else to add.
View ArticleComment by periblepsis on How do mains LED strips work?
@CaveScientist Efficiency with LEDs is kept higher by making sure that the voltage supply provides only just enough headroom to allow current control to work. (Voltage control of brightness is much...
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Answer by periblepsis for How to do an electrical network analysis?
question and answerI'm preparing for an upcoming exam in electrical engineering and cameacross this task. My question is: Which method is best for this?There are these commonly applied techniques (for...
View ArticleComment by periblepsis on Conceptually, what is phase?
This function will press on defining the meaning of phase.
View ArticleComment by periblepsis on BJT transistor overestimating Ic current
Do you really intend on using the TO-18 2N2222A? Or a TO-92 PN2222A/P2N2222A? The first you can heatsink. The second, not so much. And what do you really require for the collector current? And what is...
View ArticleComment by periblepsis on Can lowering resistor temperature reduce...
The whole idea is based on the 2nd law of thermodynamics (thermal equilibrium = no heat flow) and the equi-partition law (nuanced, as the Hamiltonian here involves both position and momentum.) Lowing...
View ArticleComment by periblepsis on How to determine band-pass frequency and bandwidth...
Harry, Phil Hobbs has a pretty good book on the general topic: "Building Electro-Optical Systems". Burr-Brown also has a number of papers to read. Though I cannot say they discuss the exact circuit...
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