Comment by periblepsis on A Problem with the Basics of OpAmps
@PaulTraficante LDRs are inherently non-linear. They will range from very small resistances at high lighting situations to incredibly high resistances with low lighting situations. If you want any kind...
View ArticleComment by periblepsis on Reading Position Data from AS33-M42M Encoder
I just spent a few seconds doing a google search and found this. Does that not provide protocol details? I've not read it -- just finding it -- but it looks to me as though all the necessary...
View ArticleComment by periblepsis on Why always one diode takes up all the voltage drop...
Consider the scope probe as part of the circuit. How did you make your measurements? Did you place one end of the scope always at ground? If so, try placing the ground side on the +5 V, instead, and...
View ArticleComment by periblepsis on Brief exposition of linear systems theory for an...
Michael, the best work will come from the early scientists in this area. Their publications will be targeted directly at mathematicians of the time, as well as engineers (most of whom in their...
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Answer by periblepsis for Transistor circuit
What you have is essentially this:simulate this circuit– Schematic created using CircuitLabIf we assume about \$700\:\text{mV}\$ for the \$V_{_\text{BE}}\$ junction of the NPN, tentatively, and...
View ArticleAnswer by periblepsis for Solving an RLC network problem with Kirchoff's laws?
I'll avoid attempting direct answers to the questions. I'm not entirely sure about what #2 is asking, anyway. So it's better I avoid any interpretation and instead focus on what you wrote:I'd like a...
View ArticleComment by periblepsis on Detecting general direction of infrared beacon...
@dragoncoder047 Given that you have an oscilloscope, you should first document what you see at the detector pair pins inside the toy before you dismantle it. By demodulating type do you mean such as...
View ArticleComment by periblepsis on Turn ON LED when the receiver is tuned to a...
@TonyM I've been seeing the same thing and now that you call more attention to it, it's all the more clear that there's a problem when down-voting and failing to provide a reason for it in comments....
View ArticleComment by periblepsis on How to derive quiescent operating point of non...
The tail voltage looks inverted to me. Also, are you talking about non-ideal transistors in such a circuit? Or are both transistors considered to be identical and well-matched? Do you mean to include...
View ArticleComment by periblepsis on Are saturated BJT transistors not polarized?
It is possible that what I write here on the topic provides all the detail you may need. It's also possible that it goes too far beyond what you are asking about here. Check it out and let me know. But...
View ArticleComment by periblepsis on Prebiased BJTs divider
We might assume, but it would help a lot if you would show a schematic that makes your works clear and concrete. I think you are talking about bipolar transistors that also include, internally, a...
View ArticleComment by periblepsis on Calculating voltage drop
@TIMDRIPCAN If you mean over on the left side then it's just a simple resistor divider that can be converted from three parts (ideal voltage source, plus two resistors) to just two parts -- a new ideal...
View ArticleComment by periblepsis on How do I find the values for the capacitors and...
user535918, The datasheet only specs a maximum guarantee of 3 A. It touts 4 A in the headline. But if you look at the spec, the guarantee is only 3 A. You will need to support 3.2 A into a 4 Ohm load...
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Answer by periblepsis for Current limiting circuit behaves not as expected
That's not a very good circuit.From a very simplistic view, you can consider the bipolar's \$V_{_\text{BE}}\approx 700\:\text{mV}\$, that bypasses both diodes. This means that from a first order...
View ArticleComment by periblepsis on High pass filter explained in terms of charging
Lipin, How comfortable are you with calculus? It's possible to discuss the circuit's behavior over time even with a sinusoidal source, which also varies in time. But to pull together the complete...
View ArticleComment by periblepsis on Are there any battery types that can resist high...
You should initiate contact with NASA or the ESA about your question and see if they can route you to a specialist. They have to deal with this. Currently, my understanding is either nickel-hydrogen...
View ArticleComment by periblepsis on How to make a FSM state machine for a bit sequence?
Turing, Do I gather correctly that you need to draw a diagram? Also, logic for it? (You need just four FFs.)
View ArticleComment by periblepsis on BJT DC amplifier
@HserHtoo When you write "thevenin resistance of 2 Ohms" do you mean that the load will be a maximum of 2 Ohms? Or what exactly did you mean when writing that?
View ArticleComment by periblepsis on Example 8.6 from Hyat Engineering Circuit Analysis
user17..., I am having trouble understanding your question well. But I do get \$V_{_\text{C}}=2\cdot\exp\left(\frac{t}{60\:\mu\text{s}}\right)\$ for 8.24(a). The voltage across the \$1\:\text{A}\$...
View ArticleComment by periblepsis on Efficient solar blinker toy
You should search the site. But this answer appears to suggest two different designs that may satisfy. I would strongly recommend getting a high efficiency LED designed for 1-2 mA operation. (You won't...
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