Comment by periblepsis on Is a 100MHz oscilloscope good enough for SPI, UART,...
Calvin, the cheapest stuff is noisy, funky, and won't meet the specs they tell you about. But a dual channel with signal generation and multimeter is under USD80 (The Zoyi ZT-703S.) And...
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Answer by periblepsis for LTspice Meas Directive?
I just tossed together a quick foldback circuit. I set up \$R_1=1\:\Omega\$ so that the foldback should start somewhere after \$650\:\text{mA}\$. I set \$R_3\$ to provide enough base current for...
View ArticleComment by periblepsis on Transistor with only 2 pins
@GodJihyo All the diacs I've seen, those looking a lot like this, are labeled DBn, with n being like a 2 or 4 or something single-digit looking. The "C" here is quite annoying. Maybe if more of the...
View ArticleComment by periblepsis on Does a negative base current in BJT npn mean that...
Show us your KCL work, please. You can use \$ to surround/bracket Latex-like (MathJax, really) expressions. You can use $$ to surround them where they take up a whole line, instead. It's not possible...
View ArticleComment by periblepsis on What's this vintage diode(?) from the 1970s?
Assuming the schematic is correct (and it doesn't look wrong, first glance), D1 sets a voltage bias between the bases of T4 and T5 necessary for class-AB/class-B operation. T3 is a VAS with C12 setting...
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Answer by periblepsis for Transistor Amplifier circuit to generate regulated...
You don't need anything too complex, though a TL431 would be helpful. Something like this:simulate this circuit– Schematic created using CircuitLab\$Q_1\$ is a simple comparator. \$R_1\$ guarantees a...
View ArticleComment by periblepsis on What data bits value do I need to choose for my...
I see lots of width errors and you have highlighted data bits in a multiplexer dialog, which deals with widths. So, I would imagine you know where to look to fix width errors. But obviously, not. I...
View ArticleComment by periblepsis on What devices should not be connected to a...
xtra, I think you are talking about NEC 406.4(D)(2). Note that it refers to NEC 250.114. There are distinctions made there. NEC 406.4(D)(2) is about what's allowable for the home owner. NEC 250.114 is...
View ArticleComment by periblepsis on Largest SRAM with legacy SOP-ordered pinout
My surface thoughts only: I suspect you are correct about the demarcation point where things change. If so, then you probably don't get to ask why. It just is. You can always create a small board that...
View ArticleComment by periblepsis on What's this vintage diode(?) from the 1970s?
@MartinHenne So, it's not for line-out but for headphones. That would move some needles. The emitter degeneration for one. I'll to take a look in half a day. Thanks!
View ArticleComment by periblepsis on Mysterious artifacts in my strain gauge data. Can...
I think this is a good catch, +1. VCP coverage has grown and changed over the years. But the quick reference table in the above link provides timing information for the tilts (cuts) used. And the OP...
View ArticleComment by periblepsis on How to increase current after previously lowering...
You will either use a linear regulator that can be adjusted to the voltage you want, such as the LM317, or else you will need to purchase an adjustable buck switching regulator. The LM317 is probably...
View ArticleComment by periblepsis on What happens to signal lower than input offset voltage
What is your workflow and software use to get to this point with Audacity? Is there any real hardware in the chain? Or is everything a series of simulators, generators and other software getting to...
View ArticleComment by periblepsis on Dynamic circuit using second-order differential...
@KondoAI I haven't yet looked over your work. That will have to wait until another time. But thanks for adding it here. I have a few questions... Are you supposed to solve this using a state variable...
View ArticleAnswer by periblepsis for understanding positive and negative rectifiers
There are two half-cycles to consider. Just two. Let's say the first half-cycle (#A) is the positive one. Then the second half-cycle (#B) is the negative one.And given that you write the diode turned...
View ArticleComment by periblepsis on Can 60Hz notch filter remove inteference current on...
@Jtl Perhaps consider spending a little time reading though TI's SBAA188 application report and improve your question as you see fit, from there.
View ArticleComment by periblepsis on How to power a UAV using solar cells
Begin by filling up a detailed logbook from the studies you have already and will yet examine.
View ArticleComment by periblepsis on Find simple BJT current mirror Iout
There are some conflicts in what you write. For example, an ideal BJT has a known VA and known beta (both are infinity.) So those things are not unknown. The only interesting aspect in this question is...
View ArticleComment by periblepsis on The effect of silicon diode vs Schottky diode as...
In the case with the Schottky, if you use it in practice, do you intend on including both 3k3 resistors? Do you understand why the 3k3 addition did what it did in simulation?
View ArticleComment by periblepsis on The effect of silicon diode vs Schottky diode as...
I don't think the OP actually intended on adding that 2nd 3k3 resistor. I think the OP just poked it into simulation after seeing earlier bad news, saw that adding it made things look better and more...
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