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I It is just a random picture. Newton's method can be punched into an excel spreadsheet? How?

This equation takes a present value (PV) to find mortgage payments, PMT: Alternatively, switching V for PV and T for PMT: V/T = r(1-r^n)/(1-r) What is an algebraic method to solve for "r"? Can it not be solved for? I realize I can just find out "r" by trial by error in Excel using the PMT...

For first 6 months: I = PRT. Interest = ($10,000) * (3.54%) * (0.5 years) = $177. For next 6 months: I = PRT. Interest = ($10,177) * (7.12%) * (0.5 years) = $362. 10000(1+[0.5*3.54%+(1+3.54%*0.5)*7.12%*0.5]) = Ending balance = $10,177 + $362 = $10,539. $1000*9%*0.5 = afterSix = 45...

Say I bought $1000 worth of I bonds on August 1, 2022. For months 1-6, the overall interest rate is 9.62%. For months 7-12, say the overall interest rate is 6%. SI = Principal_1*Rate_1*Time 1000*9.62%*6 = SI CI = Principal_2*(1 + Rate_2)*Time − Principal_2 SI*(1+6%)*6 - SI Like this or?

Wait, the composite rate is already 9% as said here: http://eyebonds.info/ibonds/10000/ib_2022_08.html So what equation uses that composite rate of 9% for the first six months. So is that the simple interest rate for six months, and then it's compounded; then that gains simple interest for...

I Bonds are compounded semi-annually. What's the equation for an I Bond? https://www.wallstreetmojo.com/series-i-bond/ Overall Rate = [Fixed interest rate + (2 x bi-annual inflation rate) + (Fixed interest rate x bi-annual inflation rate)] Say the first 6 months is 9%, the next six months is 6%...

Three phase squirrel cage induction motor with given parameters (stator winding connected in delta) nominal power: Pn=22.4kW nominal stator voltage: Vsn=230V nominal stator current: Isn=39.5A nominal stator frequency: fsn=60Hz nominal speed: nn=1168min−1 number of pole pairs: 3 stator...

V(ρ) = V_o*ln(ρ/0.0018)/ln(45/180) (Attached picture is where the unit vector of r is really ρ.) In cylindrical coordinates ∇V = ρ*dV/dρ + 0 + 0 ∇V =derivative[V_o*ln(ρ/0.0018)/1.386]dρ ∇V = V_o*0.0018/(1.386*ρ) E = V_o*0.0012987/ρ Work = 0.5∫∫∫εE•E dv Bounds: 0.0018 to 0.00045 m D = εE =...

Hardware documentation Short datasheet: mouser.com/ds/2/389/x-nucleo-ihm02a1-954332.pdf Long datasheet: st.com/content/ccc/resource/technical/document/user_manual/group0/9c/49/e6/da/a3/75/48/b9/DM00237629/files/DM00237629.pdf/jcr:content/translations/en.DM00237629.pdf

I don't have a debugger yet, but my company is getting one... In the mean time, I've been un/commenting out parts of Mbed's code. Their Hello World program is available from this website, and it can be used directly in their online IDE by clicking "Import Program"...

So the issue isn't me knowing vector addition... I suppose one should only use this site as a starting point to define the question, then after one reply, ask it on allaboutcircuits... How are the vertical components calculated? h = 6 m... B1 = u*i/(2*pi*R) B1 = 2*10^(-7)/6 = 3.33e-8

4.7+4.7 = 0.78 No, I do not.

I don't know. So how does that help? I suppose I can guess terms, trial and error: sqrt(j^2+k^2) = 0.78. ...I hate playing this game between inquiry based learning and beating around the bush. When the semester actually starts, I can't spend a week on one problem like this. Quizzes are more...

That makes sense where the "d"s cancel out...but I don't understand why the Pythagorean theorem can't be used alone. cos(θ) = (d/2)/d cos(θ) = 1/2 So it's the magnitude of "x"combined with the direction (defined by the cosine-term), and that's just what makes a vector...and not a scalar?

I don't know the dimensions. All I see is the h (6) and d (1). Sqrt(6^2+1/2^2) used to calculate B.

I thought that is for the direction of the vector defined by a1 (in F1 = k*Q1*a2).

"F" sub "1x" the exact same in the solution except without the "d". d2 is in the term "k".

I got 4.7*sin(377t) micro-Tesla for each wire, but where are they getting the total B-field equaling 0.78 micro-Tesla? Is it some hidden trigonometry?

x^2 + d^2/4 = d^2 x = sqrt(3d^2/4) F_1x = sqrt(3)*d*k*Q1/2. In the solution, where did the "d" in the numerator go?? Is my math wrong?

Which is better to use? The equation for the area or the circumference of a circle? Schaum's Electromagnetics (4 ed) by Edminister vs http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elecyl.html

Part (a) is (1/pi)*g_m*R1 (1/pi)*(1/26)*1000 = 12.25 = C.G. (b) probably in millivolts range Re-did search with "-datasheet transistor 1db gain" and got some good results... But never mind; I'll move on, sunk cost.

Searching "-datasheet transistor 1db gain .045" doesn't help.

Homework Statement a) If this mixer is connected to a matching 50Ω resistor, what is the conversion gain? b) IIP3 (Third Order Intercept Point) is 15 dBm, what would be A1dB? c) What is P1dB? Homework Equations https://www.ece.ucsb.edu/Faculty/rodwell/Classes/ece218b/notes/Mixer1.pdf#page=9...

I opened up a new thread: https://www.physicsforums.com/threads/replacing-two-corresponding-switches-as-one-with-and-gates.953697/ (I mistakenly thought I couldn't edit the original question.)

Homework Statement So this is not homework or an assignment, but usually my questions get moved here anyway. This is from a project I'm working on for my job. A user can choose between DPDT functionality (so having "SensorI" be a doorway that goes up and down, reverse) or add another sensor in...

void setup() { Serial.begin(9600); // bps ~ baud rate delay(50); } void loop() { Serial.write("R0030"); // 30 mm = 1.2" = 0.1' Serial.write('\r'); // "\r" (stop bit) carriage return delay(60000); // takes a minute to show on graph Serial.write("R0061")...

Because with the partial help of another forum, I was going to post the complete solution to what I am doing (i.e., writing an Arduino program to emulate this sensor) . . .

"The output is an ASCII capital “R”, followed by four ASCII character digits representing the range in millimeters." Talk about reading the datasheet! I had trouble interpreting how to convert that. For example, I did not know that "\r" would be 13 in ASCII. (I would've taken both characters...

Problem statement For an ultrasonic sensor (MB7380) sending 8 data BITS, no parity and one stop bit, what is the ASCII code it will give for a certain distance like 0.15 meters (0.5')? maxbotix.com/documents/HRXL-MaxSonar-WR_Datasheet.pdf#page=2 Attempt at a solution I do not know how to...

Yes, that's the easy part. It's only a few feet. The site is remote, but powered by solar panels. Transmission line effects are negligible.

"6 GPIO pins and also contains a High Speed UART, SPI bus and I2C Bus" "Includes 2X High Speed 3.3V (5V Tolerant) TTL Serial Ports, 1X High Speed SPI Interface, 1X I2C Interface with onboard pullups, 8X GPIO Pins" I can ask the company for a numerical value. Is "high speed" is a specific...

The only connections are the precrimped wires to the molex connector sockets, and whatever's under the tubing. Each wire is independent.

I do not know the sensor cable length, but from the Hirschmann plug: Ten inches, molex connector, ten inches. All I can find on the Q4 datalogger are instruction manuals, not datasheets.

The GPIO pins are connected like this: Sensor (not shown) → Hirschmann plug → four 20 AWG gauge wires → molex 3.0 microfit connector male → female → heat shrinked tubing in the middle of each of the four wires → GPIO header on Q4 logger They needed to connect them together (with the molex...

Most of #21 lists very general resources. For example, listing LabVIEW, Adruino, Cypress, etc is not helpful. But maybe I'm wrong. Specifically, using an Adruino, would I be writing code with the digitalRead() function to evaluate if the digital two-pin sensor is giving a correct output? Is it...

What is a uC?

Yes, but I may not be able to design such a system. "Output required signals (TTL, voltage, pulse, 1-wire)" part is doable. Although, I do not know how to create 9600 baud with 8 data bits, no parity bit, and one stop bit signal (for the TTL serial data). What's more, the circuit needs to...

For the most part, the eight sites give good data. Sometimes one or two do not. It varies among the sites too. Take rainfall for example: Fig. 1. Several sites giving inaccurate data: no rainfall on this day--even though one site says that half-a-foot of rainfall occurred! Bad. Fig. 2. Proof...

(There are two MB7380 ultrasonic sensors.)

Should I be having this discussion on a different website? What would you suggest? It seems as though I'm wasting a lot of time here explaining extraneous details, and without resolution.

Thanks for seeming to try to help. I got one useful suggestion from a different forum, and two confirmations that I could just use the pocket-sized oscilloscope I mentioned. These are environmental sensors on a farm. There are ten sites with a data logger and each of the three kinds of senors...

https://flexscada.com/manuals/flexsq4/ The pins that are connected use the following: UART_RX/PC Console RX GPIO3 GPIO5/UART2_RX/SPI_IN GPIO6/SPI_SCK I do not have any uC development boards. Again, I do not even know what uC means. I am located on a farm, not a university. I do not know how...

Excluding the 1-wire, is the quickest solution the https://www.amazon.com/dp/B006J4FZMO/?tag=pfamazon01-20? which can also output 10Hz to 8MHz digital signal.

This question/discussion was moved to the homework section. Although, it is a technical project I need some direction on. What about using CY8CKIT-050? It is $93 on https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/CY8CKIT-050B/428-3184-ND/3770081, and the IDE is free. I have...

The GPIO pins were chosen out of house. An electrician, in house, who wired the rest of data logger board (flexs Q4) just wired the GPIO pins it how they told him. And now they tasked me, an EE student, with the project of creating a test rig. The pins that are connected use the following...

Digital Storage Oscilloscope? So you're saying that buying the handheld oscilloscope is a good idea? I do not have access to uC dev board. I also do not know what that is. My emphasis is not computers. I know every little about protocols (for the one-wire sensor).

Spec My job, as an undergraduate EE student, is to create a test rig for offsite electronics (environmental sensors hooked up to a data logger, 12V batteries and solar panels). The test rig should be able to evaluate output from sensors (serial TTL, analog voltage, 1-wire) and output required...