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H: AC Induction Motor Slip and Torque control Vs V/f control
I am trying to understand this github code for speed control of AC Induction Motor. It calculates slip value to adjust the speed of motor. I wonder if its the same thing that is called constant V/f speed control? Is it just difference in the terminology, V a... |
H: Chrome plating current control
I am an electronics hobbyist and this is my first attempt at an analog circuit of this type. Mostly I stick to arduino and LED stuff or just wiring up kits, etc. This is my first attempt at designing a "real" circuit. I think I have a really good start here, maybe my circuit would eve... |
H: Do I have to supply an analog switch IC with a voltage level higher than the switched voltage level?
I have an analog switch circuit as seen in the image above.
I want to switch a digital signal which has either -5.4V or +5.4 level.
My analog switch is MC74VHC4316.
According to the datasheet, the VCC voltage can b... |
H: Beginner: Issues wiring up a simple LED circuit
I'm a programmer, but a complete beginner in electronics. I've been following this guide where one of the first projects is to create a LED circuit using this circuit diagram. I've tried wiring up the simple LED circuit, but it doesn't work.
I'm guessing some of thes... |
H: Short to battery & short to ground
In automobile industry, while some of the sensor & valves were connected with electronic control unit, short to battery & short to ground test conditions are taken care against the loads.
What is the reason for this test condition?
AI: Any wire connecting to a sensor can touch or... |
H: RAST 2.5 pcb design
Currently I am designing a pcb and I need a RAST 2.5 connected to my board DIRECT MATING as seen as picture below (example from google).
But as I am searching in the library, I am using EAGLE, I couldn't find the exact component for that particular connector. I'm searching on google and couldn... |
H: What protective device can be used to avoid no-load operation in a dc series motor?
I think there must be some relay or converter which automatically shuts the machine on no load condition.
( Just Guessing )
The following para is a quora answer which I am not sure is correct, please share your thoughts-
You can mod... |
H: How does Synchronous Transmission provide synchronized clocks?
I was reading a textbook which says:
in synchronous transmission, the bit stream is combined into longer “frames,” which may contain multiple bytes. Each byte, however, is introduced onto the transmission link without a gap between it and the next one.
... |
H: Is Gaussian noise equal to white noise?
If noise on a signal is randomly fluctuating in time domain around its mean following a Gaussian normal distribution (Gaussian noise), would this be equivalent to an constant intensity in the frequency space (white noise)?
Can we somehow relate the frequency distribution to t... |
H: DC Power Jack pinout
This question is related to part with part number PJ-102AH (CUI Devices).
Digikey link: https://www.digikey.com/products/en?keywords=PJ-102AH
Datasheet: https://www.cuidevices.com/product/resource/pj-102ah.pdf
The datasheet shows this:
For this, I understand that pin 1 is positive.
What is re... |
H: Buck converters duty cycle
From this article: Power Tips: Power converter topology... they say that:
Moreover, buck-converter duty cycles become extremely small in
high-voltage AC/DC conversion. For a 440VAC to 15VDC conversion, the
duty cycle could be smaller than 2% in a DCM buck converter. When
operating ... |
H: Purpose of capacitor and resistors on the output of three-state buffer
I intend to use a buffer with three-state output in one of my designs. The datasheet of the buffer IC shows the following circuit:
What's the purpose of CL, RD and RU on the output of the buffer. As I understand the values of RU and RD are equa... |
H: Beginner: How to wire up a navigation button / joystick?
I have a joystick that I wish to connect to my Arduino uno. However, there's no VCC or 5V or GND pins to connect to. I do see a COM pin, but I'm unsure how I should wire that to the Arduino. My objective is to take an input that determines whether LEDs should... |
H: What would happen if I used a potentiometer to produce a 5V DC signal for an Arduino from a 9V battery?
What makes the potentiometer not a good component to use for reducing the 9V to 5V DC for an Arduino?
I thought of using it but I been told it is not a good idea, so I am looking into the reasons why.
AI: When I ... |
H: Does dividing a clock increase its jitter?
I want to have my microcontroller and ADC using a clock derived from the same source in an effort to avoid intermodulation effects. All clocks are under 50 MHz.
The maximum SNR out of an ADC is bounded by the jitter of its sampling clock. This means that I want to make sur... |
H: Help understanding open collector comparator
I am working on a simple circuit based on the LM311 comparator. It has an open collector, which is not something that I've used before, and I have a few questions. First, my understanding of the open collector model is that the internal comparator switches between open a... |
H: Vacuum Fluorescent Display: What are the benefits of an AC filament driver instead of DC?
Question is already in the title:
What is/are the benefit(s) of an AC filament driver instead of DC for VFD displays?
It works with DC so why to invest in an AC driver?
Anyone?
AI: The filament is also the cathode of the devic... |
H: Kelvin Source Terminal on MOSFETs
On MOSFETs with multiple source pins, is the so-called "Kelvin-connected source pin" connected any different internally? Or is it just like every other source pin?
EDIT: Just to be clear, I am not asking what the Kelvin connection is for. I'm asking whether it is physically imple... |
H: Fluctuating ADC results - is it normal and characterized in a datasheet?
As I have been reading [1], there exist four different DAC error types, which contribute to the overall error:
Offset Error
Gain Error
INL Error
DNL Error
Is my understanding correct, that these are static errors?
So if I was to take a measu... |
H: 4 Pins Potentiometer (Replacement)
I am trying to repair a very expensive manlift joystick.
It has 4 pins total, three like a normal rotary potentiometer and then a fourth across from the other three pins.
It is PEO 284-04378 Type EJ pot. It has another number stamped "5k 1342"
The company not produce it more and I... |
H: Simple circuit for a single 10 ms pulse when closing a contact switch
I have a simple circuit (see image below) that creates a single 10 ms pulse when closing a contact switch (SPST) but I also need that after generating a pulse the circuit will wait some time (500 ms for example) until being able to generate a new... |
H: Does Slave Select have to be sychronous with Clock?
I'm working on the SC18IS600 chip (SPI to I2C converter) and have been having issues just communicating with it. At the moment I am attempting to configure the I2C Address register and set it to 0x3F or 0x00. When reading the address back however, I am getting (af... |
H: Charge carriers of an electric current
I was under the impression that electric current was caused exclusively by the flow of electrons moving through the wire.
However upon doing a little more research on electric current, it is said that charge carriers are often electrons moving through a wire. What other charge... |
H: STM32F051 ADC DMA overrun
I am trying to use ADC with 2 channels and DMA, but I only get 1 reading before the overrun bit gets set. Also the 1 reading is wrong, I am expecting a value of approx 2100, but I am getting around 70. I can see in the hadc->DR that the value are correct, but it is not transferred to the a... |
H: How does my breadboard circuit diagram look? Is my circuit going to explode?
I'm working on my first Arduino project and I thought I picked something simple enough. But before I set my breadboard on fire or ruin any of my components, I wanted to make sure my plan made since because I'm synthesizing several tutorial... |
H: If AA batteries don't supply sufficient power, will adding more of them in parallel help?
My device requires ~4.5 V.
I'm using 4 battery packs connected in parallel
Each battery pack contains 3 metal-encased non-rechargeable alkaline AA batteries.
I used voltmeter and verified that each battery pack individually p... |
H: Understanding the role of a pull-up resistor
I am trying to understand the role of the transistor R11 in the following schematic:
The schematic simply generates a pulse at R5 when the switch is pressed.
If I understand correctly R11 is what one calls a "pull-up resistor" and it ensures that we can reliably switch ... |
H: Why is the datasheet showing VGS at absolute maximum?
I'm looking at IRLZ44N datasheet.
In the ABSOLUTE MAXIMUM section it is listed that for VGS it is 5V. However in the SPECIFICATIONS section below VGS threshold is listed as 1V to 2V.
At the same time in the ABSOLUTE MAXIMUM section the continuous drain current i... |
H: How is the "I" current calculated in this circuit?
I found Vo with these processes
[10 - (- 2)] / (1200 4700) = 2.033mA
1200 * 0.002033 = 2,43V
Vo = 10 to 2.43 = 7,57V
but I can't find the "I" current. Can you help me?
AI: To find I it is a similar process and you can take credit for the fact that there is no lo... |
H: Software oscilloscope
I have been developing a C language software for software oscilloscope
which is part of a control software. From timing point of view the
software consists of two execution loops.
The first execution loop (let´s say "fast loop"- FL) is interrupt service
routine (ISR) for the "end of A/D conver... |
H: Identify components in an audio circuit schematic
In the attached image you can see a circuit part of a commercial audio amplifier. I'm trying to determine what kind of component is R-CH and what role it plays in the circuit. I'd also like to figure out whether this circuit is on the audio signal path of the amplif... |
H: How to connect a low impedance RF amplifier to an antenna?
I'm trying to maximize power transfer from my amplifier to my custom antenna, but am unsure about how to properly impedance match the system.
My amplifier has an output impedance of 4Ω, but is connected with a BNC cable, which are usually 50Ω.
My custom ant... |
H: I2S audio interface - sync of MCLK and LRCLK signals
I plan to use IC AK4430, an I2S digital interface sound output chip, to be connecte to an ESP-07 Wifi module via 3 wires (BITclk, LRclk and DATA). But the IC also require an input signal that they call as MCLK (master clock).
AK4430 on Digikey: https://www.digike... |
H: Wall supply Plug-in "noise"
We have had some issues with resonance overshoot from our 10W wall supply to a products LDO. The theory is that this overshoot will destroy the LDO once in a while rendering the product useless.
While investigating this I examined the difference between having the wall supply plugged in ... |
H: Powering sewing machine card
Hi, I received an electronic card to repair. The user says that it doesn't work and didn't say anything more, such as why it was broken or which part is not working.
So I want to plug in an energy source to the board to check capacitor's voltages, or if is there too much warming parts ... |
H: Some confusions on a basic CMOS multivibrator question
This is a previous exam question, so I do have a solution already, I am not trying to make you solve my homework etc.
Few questions in my mind regarding this question above,
There is not a given information about initial capacitor voltage, so I assume it sho... |
H: Are there any real world examples of encoding data in EM polarization?
Data can be encoded by modulating the frequency, amplitude and phase. But I can't find any references for encoding data in the polarization of EM waves (either analog or digital). This is probably for a good reason which I do not understand. Are... |
H: Can signals be used directly in conditional statements in lieu of comparison to 0/1?
Can a signal (of type std_logic) be used directly as the condition in an 'if' statement? For example, can I write
if (A and not B) then
instead of
if (A = '1' and B = '0') then ?
I realize something wonky may happen if the signals ... |
H: Resistive AC voltage divider and phase
I built myself a power monitor a few years ago that works and I was trying to simplify mine by cutting out an expensive and hard to find 12V ac:ac adapter. I am familiar with a voltage divider and it's operation makes perfect sense to me in the context of a DC circuit. Ie th... |
H: What's is yx8018b and what is it symbol?
I am trying to fix some solar lamps, that contain pretty much only a handful of electrical components:
A switch
a solar panel
a 1.2 V AAA batery
an LED
a resistor (inside its "home" it measures ca 45 mOhm, it's labeled in Red-brown-violet-Silver [210 MOhm?!])
and then a l... |
H: What kind of transformer is this?
What kind of transformer is this and how is it used?
I'm also confused about why there are only 3 wires. I don't see any other pins on it. Although on the opposite side, you use the number 4 on one side and RT on the other.
AI: That's an auto-transformer. It is used to step down fr... |
H: Measuring resistance with ohmmeter over resistor and capacitor in parallel
In "Teach Yourself Electricity and Electronics, 6th Ed." [Gibilisco] (2016) a test question reads as follows:
A DC ohmmeter will give us a correct reading for a component in isolation (not connected to anything else) if that component"
(a)... |
H: Source Resistor of JFET Source-Follower
I am designing a simple Buffer to get the voltage of a high-impedanze source to an ADC (60k Impedance).
For that I choosed an JFET in the source-follower configuration.
simulate this circuit – Schematic created using CircuitLab
To bias the gate to ground and keep the input-r... |
H: Can FPGA VGA be used as DAC?
Can a VGA output be used to output an analog signal?
I'm using an FPGA to program and control the VGA output.
I want to use it as a DAC to control an external circuit (I'll be doing PID control). Could I just stick individual wires into ports corresponding to certain colors and program ... |
H: Can't solve the math related to power factor improvement
Image source - Fundamentals of Electric Circuit by Alexander & Sadiku, Practice problem 11.15.
I tried to solve the math in the following way.
\begin{equation}
S_{old}=140000\angle cos^{-1}(0.85) = 119000+j73749.576\\
S_{new}=140000\angle cos^{-1}(1.00) = 14... |
H: Drive LED with open-drain active-low signal
I am planning on using an IC (https://datasheets.maximintegrated.com/en/ds/MAX38888.pdf) which has the following output pin:
It is an open-drain active-low backup indicator. The BKUPB is held low when the part is in backup mode. I would like an LED to light up when the I... |
H: Why did this triac driver resistor let the magic smoke out?
I hope the title is acceptable under this website rules but it is exactly what happened. I wired up this circuit that I thought I tested in the past multiple times, but I might have wired up slightly different. However the following schematic is an accurat... |
H: Understanding Diode ROM
I read that the intersection of a row and column represents a bit, and if an intersection is linked with a diode the corresponding data output line goes low or 0. But why?
Take the following figure for example. An input of \$ A_2 A_1 A_0 = \{0, 0, 0\}\$ gives a 0 (LOW) out of a's NAND gate a... |
H: Connection a Low Amp wire to High Amp wire
Suppose 5 Amps of current runs from point A to C.(20V) I want to connect a thin wire(I believe not for more than 1Amp) to a point B in between A and C. Will the amps melt the wire where it is connected to 5 amps wire? The wire will only be powering 350 milliamps load.
AI: ... |
H: Multiple Switch Equation to NAND Only equation
I'm trying to convert a regular Boolean equation that has multiple inputs into a NAND only equation. My guess is that I'm supposed to convert using DeMorgan's law, but I'm not entirely sure how to do that. The equation I'm trying to convert is (A&~B)|(C&D).
I've create... |
H: Calculate voltage drop across Linear MOSFET in saturation region
Considering the below schematic, how is the voltage drop across the MOSFET calculated when it is operated in the saturation region? I am trying to calculate the power dissipated by the MOSFET so that I can choose an appropriate heat sink. RDS(on) is o... |
H: Why is my IRL540 slow to turn off?
I'm trying to switch 12V with an IRL540 from a 5V micro. Right now I have it a 1k resistor between 12V and the drain, the source to ground, and the gate has a 100kHz 5V square wave on it. That's the whole circuit, this was just to validate the switching.
If I go faster than this ... |
H: breakpoints in baremetal code for arm stm32
I am writing a simple baremetal code for STM32. I wrote the linker and the startup code similar to this . My understanding is that the .text section will be placed in the flash memory of the controller.
Question:
In such a case, it is not possible to use software breakpoi... |
H: Connecting Wattmeter in Proteus
I want to check the power across a device in Proteus. But I am unable to understand how to connect Wattmeter pins to the circuit. Please Help me to understand this or suggest any other method to calculate power.
Thanks
AI: Wattmeter has a voltmeter and an ammeter. You need to connect... |
H: Calculate lifespan of BLE ESP-32 module
I have purchased an ESP-32 BLE module. I have programmed it to turn on to broadcast a Bluetooth text to my phone and then enter the deep sleep mode. Then continue this loop.
When the Bluetooth text code it been to run the current it pulls is around 150mA. Then the module ente... |
H: Need help identifying this little chip
So, I was changing some thermal material on my Sony A5100 camera, but somehow must've damaged one of the chips (below). Right now, the LCD display has a slight green tint to it.
I swapped an LCD screen for a new one, but the green tint remains (the video recorded is 100% fine.... |
H: How do I measure the reactive power of a single phase system?
In books and various websites, I have seen that the reactive power is measured using two wattmeter method. This method is applicable to a balanced three-phase system.
But at home, just a single phase is supplied. And we use different types of load. For e... |
H: Making mod-12 counter using ic7492
There is this exercise in my book said to make a mod 6, mod 4, mod 3, mod 12 counter using 7492. I can do mod 6, 4, and 3 but there is a problem when doing mod 12.
The circuit counts to 5 then skip to 8, how can I fix this problem?
AI: In the datasheet of the 7492 we can easily co... |
H: How can I order a custom IC?
I'm new to IC design and just wondering if it possible to order IC production if you have all necessary design files (like RTL design, chip layout from Cadence for example, etc.)
If it is then what are these companies and what is the approximate cost (for a relatively small IC like for ... |
H: Audio ADC - grounding problem
I searched through the internet but couldn't find an answer to my question. Maybe I just don't know what to search for.
I want to convert an audio signal coming from a stage box from analog to digital. I found some integrated circuits which seem to be suited just for that (like this on... |
H: How can I overcome the distortion using in this circuit by using same products as we see in picture ? Or we can use 2n700 series, 3906 and 3904 bjts
Or we can use 2n700 series, 3906 and 3904 bjts. My aim is 10W, gain 100-1000 (adjustable), 50hz-20khz amplifier by using this basic components.
AI: You can try someth... |
H: Assymmetrical vs symmetrical voltage blocking
I'm studing power electronics.
There is property for BJT, GTO, IGBT which says:
"blocks voltage symmetricaly" or "blocks voltage asymmetricaly"
What does it mean?
What is the difference between each?
AI: It is more accurately described as current blocking, not voltage b... |
H: Altium Designer : How to make a custom Top paste for D2PAK pad
I know my way around altium designer but i am not finding a good way to make openings in the solder paste layer for the tab pad of D2pak .
This is what i want :
Altium only allows me to make the paste increase or decrease in size , but it stays a squar... |
H: DC Power Supply: Turns Ratio Calculation
I am an electronics newbie looking to broaden my horizons, so I'm going through The Great Courses's Understanding Modern Electronics course. In Lecture 4, they give a project in which the goal is to simulate a DC power supply.
The supply should step-down a 120-volt rms, 60 h... |
H: 78L24 outputs high voltage >24v - Harman Kardon AVR 151
I'm trying to repair my broken Harman Kardon AVR151.
Looking at the SMPS schematic, to my very limited knowledge I do not understand,
The 78L24 is a high side 24V regulator.
Why does the schematic say tge output is 38V?
Is the circuitry show below designed su... |
H: Average input current in forward converter
I am trying to understand how to calculate the average input current of a typical forward converter. If the converter has negligible magnetizing current, a large inductance and a turns ration of n1:n2:n3, based on my understanding, the input current would be:
Ig = D*Iinduc... |
H: How do capacitors in series work?
If capacitors are connected in series with a vltg source, then how would each plates get the polarity? For a single capacitor, the electrons from one plate are pumped by the source towards the other side of the plate, but for series connection how would the flow of electrons be in ... |
H: Node voltage equation with weird solutions
I recently had an exam with the following multiple choice problem:
Consider the circuit below:
The node voltage equation for node A is which of the following?:
\$ \frac{V_A-kV_a}{R_1}+ \frac{V_A-V_3}{R_2} + \frac{V_A-V_B}{R_6} = 0 \$
\$ \frac{V_A+kV_A}{R_1} + ... |
H: Switch individual MOSFETs connected across lithium-ion cell for passive balancing
I am working on a passive cell balancing circuit using N-MOSFET. The cell voltage will be monitored by the micro-controller and it can also generate corresponding logic level signal according to over charge for a particular cell. I w... |
H: STEP7 MICROWIN PLC Ladder Diagram
I draw like the first figure in the program, but when I save the program it automatically becomes the second shape. Do the two mean the same thing?
AI: Yes, of course.
The ladder diagram is a representation of the logic in an electrical diagram format. In relay logic the two circu... |
H: how bits are still synchronized in asynchronous transmission?
I was reading a textbook which syas:
In asynchronous transmission, we send 1 start bit (0) at the beginning and 1 or more
stop bits (1s) at the end of each byte. There may be a gap between bytes.Asynchronous here means “asynchronous at the byte level,” b... |
H: the output in buck converter multi sim 14 is too low
it is required to use UC3842 to make a Buck converter that has 68V input and 29 output. i did the calculations for the buck circuit however not for the UC3842. i dont know how to calculate it. i been playing with its values for a while , the max i got was 9.8 vol... |
H: Why do I get such high values when calculating the power dissipation of MOSFET in boost-converter circuit?
I'm a hobbist interested in electronics so I don't have any "professional" training on that.
Currently I'm trying to design a boost converter and now I'm stuck at some calculations.
I wonder if it's possible t... |
H: Direction of the main beam of an antenna
How can I find direction of the main beam of an antenna if antenna has radiation intensity as following?
$$U=[\dfrac{sin(5\pi cos\theta)}{10sin(\pi cos(\theta/2))}]^2$$
Where
$$0<\theta<\pi$$
My first trial is to find the places where derivatives equal to zero. But the resul... |
H: Relay pins too close on PCB by design?
I'm designing an intermittent wiper motor controller to be fitted on a classic car.
As I'm selecting components, I came around this relay that seems to be fitting my needs (PCB mount, automotive, high current).
When looking at the PCB layout, I find pin 3 and 5 way too close t... |
H: Semaphore in FreeRTOS doesn’t work
I am a newbie to freeRTOS and I was trying to learn about semaphores,I am using ATmega32a microcontroller, the plan was to create 3 tasks each is blinking the same led for some time with different frequencies the result was the led is just on forever.
so I canceled 2 tasks and kep... |
H: Importance of 2nd or 3rd order RC Low Pass Filter in noise/ripple filtering
I dont quite understand what importance does having a 2nd or 3rd order RC Lowpass filter do to filtering power rail noises. If the first stage filter only allows frequencies below 15.9 Hz arent the other stages unnecessary? Adding more seri... |
H: Transformer cooling difference between water cooling and air cooling
I just know air cooling method is cheaper than water cooling method. Please tell me what is the difference between air cooling and water cooling? And if you could please use some pictures to explain it.
AI: For air the specific heat capacity Cv is... |
H: What are the units used in Shannon formula calculation?
I'm a CompSci student with absolutely no background in wireless communication who recently needs to do something with the Shannon formula:
$$
R = W log_2\bigg(1+\frac{P_t H^2}{N_0 W}\bigg)
$$
I need to calculate the achievable data rate \$R\$ given:
Bandwidth... |
H: What happens when a computer is plugged into another computer by USB?
I am just curious about what happens when you have a USB 2.0 cable with two male ports, and plug both the ends in two different computers (not for data transfer reason, or any other reason, just curious)?
I have read this similar question on quor... |
H: Propagation delay in shift register - in the context of a serial adder
The first figure (from Fundamentals of Logic Design, Roth/Kinney, 6th Ed, p.404) shows a serial adder which feeds in operand bits and stores the sum, and uses a D flip-flop to store the carry-out from each bit pair and load it back in as the nex... |
H: Measuring Current in Coax Cable Using Clamp on Current Probe
I once again find myself needing to measure the RF current in a coaxial cable.
The signal in question is a high power (100W-1kW range) signal which is a stepped waveform with a 5MHz fundemental with multiple harmonics (the 7th harmonic is highest of any i... |
H: Delta Servo Drive 220V/400V Series
ASDA-A2 Delta Servo Drives including two types: 220V and 400V series that it seems the difference is input voltage of the Servo Derive. but i doubt 220VAC or 400VAC is line to line voltage or line to neutral voltage of The local electricity grid? and if it's refers to line to line... |
H: Create a synchronous network of 400 devices
I have around 400 devices that i want to address in a star topology. Each device controls a set of LED strips (27*12 resolution). The idea is display a video animation in a good frame per second rate (at least 25fps).
I was successful controlling one set using Arduino (wo... |
H: 9 pole mini din identification
I need to buy a 9 pole mini din plug (male) to create a ps2 -> quadrature mouse adapter but I'm a little concerned the socket I'm connecting to is non-standard:
[
The reason I think this is the top 3 pins are not evenly distributed and the data sheets I look at for ordering online ha... |
H: Using QSFP28 Module at Lower Lane Rate
I have an application that requires optical transmission of 4x16 Gbps SERDES lanes over fiber. A QSFP28 module for 100G ethernet seems like a great commercial solution--it can take the four lanes and combine them over a single fiber channel. The only hitch is that all of the Q... |
H: BALUN vs other methods
I have a differential analog signal traveling over 2 coaxial wires. I need to convert to single ended. When should I use a BALUN ? When are other solutions such as OPAMPS more appropriate ?
AI: Use the appropriate one for the frequency range.
Anything less than 100 kHz, use an opamp. Anything... |
H: LTSpice provides incorrect bode plot
I want to replicate this structure in LTspice where the components 1, 3 et 4 are resistors with the same resistance R and 2 et 5 are two capacitors and opamp LT1356
this is the schema I made
this is the bode plot:
I think it's wrong because the max value of the gain is -50 ... |
H: How would you all implement a simple delay of a signal?
I am a console game developer by profession, and has no formal education on electronics / electrical engineering. In gaming lingo, a 'noob' if you will, at it. And yet I have a new found passion for fiddling with this wonderful craft.
At the moment, I am tryin... |
H: Help with TDA2030A Amplifier circuit
I am designing an amplifier circuit using TDA2030A, but now I am stuck in providing power to the circuit. As mentioned in the datasheet, I copied single power supply circuit for my amp. But the simulation in proteus is showing an error if I just test the same single power supply... |
H: How are LAN routers, WAN routers and eNodeBs connected to each other (TCP/IP)?
I'm new to telecommunication, and from what I understand, an user equipement is either connected to a LAN router or an eNodeB, and a LAN router is connected to a WAN router, and routers send the packets to the correct destination with a ... |
H: Speaker producing static noise
I have a set of speakers which has been standing in a humid place for a few months. One of them still works perfectly fine, the other not so. The other speaker creates a very static noise, barely rendering it's audio source.
Following link is a recording of what it sounds like:
Good s... |
H: Automatic series/parallel configuration
I've been thinking about this issue for a while now and came here for your guided assistance.
Situation:
Ik have 4 resistors (12V/1.25W heater pads). I need to power them with either a 12 or 24V battery.
The problem rises when I've physically placed the resistors. I cannot ch... |
H: BJT Transistors: understanding Vbe measured (model "DCIL TIP 112 N2")
On my protoboard have a BJT CDIL transistor TIP 112 N2, working in the way that on base I have a Vbb = 5V and Rb = 450 Ohms. On Collector, Vcc 24V and Ic = 0.13A. A gearmotor is working properly on that way, (covered by a diode and a capacitor)... |
H: Measuring power consumption of system with buck converters
I'm trying to measure the power consumption of a circuit which utilizes a buck converter. If I know the circuit in absence of the converter utilizes 5.125V @ 142ma, then I introduce a 12V battery source with a buck converter to drop the voltage to 5.125V, s... |
H: how the area is exactly zero?
I was reading this PDF which tries to explain the concept of poles and zeros of Laplace transform.
My question is about FIGURE 32-5(b) on page #591.
I don't understand why the area is said to be zero when, as shown, it should clearly be some negative number. The mentioned PDF does try... |
H: How to design a low pass filter for Fourier Square Wave
I am trying to create a low pass filter with a cut-off frequency of 100Hz to retrieve a sine wave from a Fourier Square Wave. I am only able to achieve a sine wave with transients. How can I edit my filter design to achieve my desired output?
AI: Where is your... |
H: Does decoupling capacitors try to charge the fluctuating source back?
In common examples of decoupling capacitors, the scenario is like this:
When the voltage fluctuates below or above its ideal value, capacitor either stores or releases energy to compensate the fluctuation in power so that the load gets a nice, fl... |
H: Can I put my battery in the middle of my parallel circuit?
This is a small project, basically cosplay, four 5mm LEDs wired in parallel. Normally, I put the battery at the end:
But could I put the battery in the middle with the same result? I'm researching simple circuits but couldn't find theory on placing a batte... |
H: Difference between reactive load and source?
Probably a silly question, but I am coming across terms like reactive power load and reactive power source in some articles in web. Does it matter if a reactive component is a source or load? Say between an inductor in induction motor and coils in synchronous generator, ... |
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