Comment by periblepsis on DC circuit and capacitor
@AgathaH Well, I'd also use the context of the classwork to tell the final meaning, then. And since I'm not there and you haven't disclosed where the class is at right now, I can only guess. (Crystal...
View ArticleComment by periblepsis on Emitter Circuit on a Breadboard
@BenMüller You just wrote above about removing the 8.2 ohm resistor. But your question shows 82, not 8.2. Which were you using, in reality? Details do matter.
View ArticleComment by periblepsis on Emitter Circuit on a Breadboard
@BenMüller Another question. A signal generator usually has a 50 ohm output impedance (some have settings, though, that can change it to things like CMOS or TTL, for example.) So, because it expects 50...
View ArticleComment by periblepsis on Is this circuit safe to be powered via USB for my 3...
Pedro, how many LEDs in parallel and what type of LED did you use? (Datasheet is needed.) Likely, you over-topped the current compliance of the USB port. Since the behavior of USB ports in such cases...
View ArticleComment by periblepsis on What relevant connections exist betwen Graph Theory...
Bryan, Have a look at videos from Darren Crowdy from a couple of years ago . Start at video #1 and go from there. I assume you are already reading Wai-Kai Chen's "Graph Theory and Its Engineering...
View ArticleComment by periblepsis on PCB maximum trace current in a power amplifier
The peak voltage across 6 Ohms at 20 Watts is 15.5 Volts. That's over 2.5 Amps, peak. The rms value is what you wrote. Are we on the same page so far? Also, is that a bridged IC?
View ArticleComment by periblepsis on Simplify one-time switch made using a flip flop?
I guess I don't follow. I'm probably not thinking well. Why not tie the switch to the clock input of the FF and tie the D input to "1"?
View ArticleComment by periblepsis on Transistor base with resistor
Looks like it could be, under the right external circumstances, the simplest form of a Vbe multiplier.
View ArticleComment by periblepsis on Why is my power amplifier giving me wrong output as...
@GodJihyo That wouldn't be enough. (Right thing to do, first, though.) There is a remaining problem in the circuit. One more thing would have to change in this specific case.
View ArticleComment by periblepsis on Time constants to include in Transfer function...
Paul, Basso has a new book out, just last December, called The Fast Track to Determining Transfer Functions of Linear Circuits: The Student Guide. It's a paperback and is a workbook format that looks a...
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Answer by periblepsis for Johnson Counter self correction
Start with the basic twisted-ring Johnson counter:There are two illegal states. But as the following table shows, those two states point to each other.(This is exactly the same as you'd get if state...
View ArticleAnswer by periblepsis for Norton equivalent in sinusoidal RC circuit
For phasors, \$I=I_{_0}\cos\left(\phi\right)\$. But the problem used sine, not cosine. I would first convert to cosine. For that, subtract \$90^\circ\$ to get to a cosine and because (for power...
View ArticleAnswer by periblepsis for LED circuit: Need to understand how to calculate
lousy regulation with a resistor in this caseResistors make terrible current regulators for long chains of LEDs. Escpecially so when you leave only a small left-over voltage to work with. The LED...
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Answer by periblepsis for Minimizing number of logic gates
For a boolean function, after drawing K-map we got that function inthe form of the sum of products (minimal representation) but problemis that when we implement that minimal representation we use...
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Answer by periblepsis for Simplifying a circuit for nodal analysis
The following is your circuit:simulate this circuit– Schematic created using CircuitLabNote that there are exactly three nodes.So my question is this: is this a 3-node circuit or a 4-node circuitand if...
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Answer by periblepsis for Sanity Check: Does adding a second voltage divider...
First off, you are right (as everyone clearly points out) that a second voltage divider will load down your existing circuit.You've got a lot of useful responses. I've one additional thought to add....
View ArticleAnswer by periblepsis for How to convert the equation to its complex form?
It's just the quadratic equation: \$\frac{-b\pm\sqrt{b^2-4ac}}{2a}\$. In your case, \$a=1\$, \$b=1\$, and \$c=2\$.So \$\frac{-1\pm\sqrt{-7}}{2}\$ or \$-\frac12\pm j\frac12\sqrt{7}\$.So...
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Answer by periblepsis for Peripheral interface design
Thanks for the discussion. In keeping with your idea of using 74373. But the following uses the edge-type 74374 (possibly fewer update clocks required -- especially if you can skew the clock slightly...
View ArticleAnswer by periblepsis for Understanding complex circuits
In general, discrete and simple (one transistor or diode) non-linear devices aren't identical to each other, so they vary one to another, and vary their behavior with operating temperature, too.They...
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Answer by periblepsis for Fundamentals of electrical circuits. Practice...
Let's redraw the schematic:simulate this circuit– Schematic created using CircuitLabIgnore \$C\$ on the left side. Given enough time it's an open circuit. Here KCL says \$\frac{v_i}{R}=\beta\,v_o\$ or...
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