text stringlengths 83 79.5k |
|---|
H: Is a pulled down signal the same as a ground signal?
I am using a multiplexer to switch my UART lines. When the logic signal (A0/A1) is high the UART lines responsible for firmware downloads are connected to my MCU, when the signal is low a GNSS module sends serial data to the MCU. In summary I am just switching ... |
H: Whats's the electronic component in this picture called?
The photo is taken from an Acer Monitor's power board. The monitor model is K242HL and the power board part serial is 4H.220V2.A17. As an electronics beginner and being of curiousity, I tried to identify each electronic component on this broken circuit board... |
H: What's the difference between normal read and fast read on the W25N01GVxxIG?
I noticed that there were two separate instructions to read data from the data buffer of the W25N01GVxxIG flash chip. There is Read Data(0x13) and Fast Read(0x0B), but their descriptions seem to be the same on the datasheet, except for the... |
H: How should non-shielded connectors be handled in a casing design?
Assume a design with a mix of shielded connectors (e.g. USB, HDMI) and non-shielded connectors (e.g. standard 0.1" headers)
A metallic casing is designed to mesh with the shielded connector housings (using sprung metallic elements and/or EMC gaskets)... |
H: Effects of backdriving a motor
If you backdrive a motor do you risk damaging the H bridge it is attached to? What considerations must be made if the motor has current running through it?
I will be using a PWM circuit to control an H bridge in conjunction with a current sensor. I plan on doing torque control while a... |
H: Can you touch a live wire without being shocked?
I understand many questions about electric shock from live wires and I apologise for adding to that list but after reading many of them I still have my concerns.
From what I have read from some of these previous questions, if there is a path from the live wire to the... |
H: How to specifiy my USB cable so there is no risk of fire?
I am making a USB powered device that draws very little power.
It is powered by a USB 2.0 cable, with the power wires soldered to contacts on the PCB. The cable has to be about 3 meter (10 foot) long.
I would like to sell this device but I would like to be s... |
H: Bode Phase Plot for negative transfer function
My question is relatively simple. Supposing that we have a transfer function of the type \$\frac{-Kj\omega}{\omega_0}\$. Then for the phase Bode plot, I should start from \$\pi\$ and then add \$\frac{\pi}{2}\$ giving me a constant phase of \$\frac{\pi}{2}\$?
Thank you ... |
H: Package of Flash memory S25F064L
I need to use a SPI Flash from Cypress / Infineon to build a prototype for a future product.
The exact model I have ordered is S25FL064LABMFM000.
According to the seller page it is a SOIC16 package which is confirmed by the datasheet :
(there is no other 16 pins package available f... |
H: Can I connect the pull-up resistors of I2C lines to 3.3 V on a 1.8 V device?
I need to use the following sensor in my project : AS7341 (ams). It is a spectrometer whose data are accessed through an I2C inteface. The datasheet can be found here.
It is stated that its power supply should be 1.8 V, and regarding the I... |
H: RTL to Gate Level Design - Verilog
I have written the following code for sinc3 flter in verilog (Vivado). I need to ask how shall I now convert this RTL design to a logic Gate level design in verilog (add AND, NOR, flip flops, etc.)? Would appreciate any suggestions.
`timescale 1ns / 1ps
module dec256sinc24b
(inpu... |
H: Scam? Does having this capacitor wired as shown provide any surge protection?
Bought this on Amazon as a dryer 240V SPD. I was trying to find out if this device is an outright scam. I found a similar post on here from several years ago but that did not answer my question. Apparently this device was originally sold ... |
H: Pull-up and pull-down resistor on one trace
Does it ever make sense to have both a pull-up and a pull-down resistor on the same trace?
Background:
I'm designing a backplane to follow the OpenVPX guidelines and I saw this rule
Rule 7-20: The backplane shall implement a 5% 220-ohm pull-up resistors to 3.3V_AUX and a... |
H: Can phased-array (ULA) gain tapering effects be modelled using digital windows?
I am attempting to model the general behaviour of various tapering techniques. It seems applying gain tapering to a ULA has very similar effects to that of applying a digital window to a signal. In fact, some common tapering algorithms ... |
H: LED driver 3.5V 25A. Low voltage, high current
I need to make a driver for an LED that works at 3.5 V 25 A. My idea was to make a DC/DC regulator from 12 V to 3.5 V and then a current limiter, but I'm at a loss as to which IC to use or how to build a driver.
The LED is the CFT - 90 W model from Luminus.
AI: There a... |
H: How to interpret S parameters on a Smith chart
I am trying to understand S parameters on RF transistors.
I chose the BFP840ESDH6327XTSA1 as my RF transistor, to operate it at 10 mA, 12GHz. The design should be optimal for simultaneously matching impedance and maximum gain. Lets say that the input/output loads are 5... |
H: Are solar panels ever used to remove energy?
Solar panels convert energy from the sun into electrical energy. Following the first law of thermodynamics, this means they remove some of the solar energy that would otherwise most likely be absorbed as heat or reflected.
Generally the former is the primary, intended ef... |
H: Add Voltage Bias/Offset to 2nd-Order Sallen-Key Highpass
I need to add a highpass filter between a signal source and an ADC to get rid of high-amplitude low-frequency signals that would cause clipping.
I built a second-order Sallen-Key filter and the circuit is working as expected. However the filter requires a sym... |
H: Grounding for working with electrostatic-sensitive devices
I'm planning one of my first electronics projects beyond basic repair soldering (it's a small pre-amplifier for a contact microphone). So I've got some JFETs and other pieces and would like to put them together without ruining them with static electricity.
... |
H: Snubber Filter Circuit Not Working Triac Dimmer
Hi I am working on a project using a triac to do phase control dimming of 120V ac powered devices. I recently translated my project from perfboard to SMT using an SMT fabrication service. The project appears to be working correctly, except for the snubber filter secti... |
H: What is the name of this 5-pin connector?
What kind of connector is in the images?
AI: It's a MATE-N-LOK connector
Header: https://www.te.com/usa-en/product-640467-1.html (Mouser: 571-6404671)
Plug: https://www.te.com/usa-en/product-1-480763-0.html (Mouser: 571-14807630) |
H: DALI DT6-DT8 Sending commands above 255
From my understanding and research, each DALI command consists of 2 8 bit parts one for addressing and one for the commands which are sent one by one,
but there are commands above 255 which are more than 8 bits of data as shown below image.
I am having a hard time figuring ... |
H: Implementing UVLO on battery charging and boost controller ICs
I recently bought a Adafruit PowerBoost 1000 Charger and found out it does not have 32.V UVLO to protect the battery.
The boost controller IC has low voltage sense (LBO goes low when undervoltage) but not active UVLO
LBO cannot be connected to EN to f... |
H: Why might you use 2 switch ICs for a 2-in-1-out VGA switch schematic?
For a hobby project, I'm planning to build a 4-in-2-out VGA (yes, VGA) KVM switch/matrix circuit. The top result on Google at the time of researching is 'Building a KVM – Part 1'. I'm trying to figure out why the engineer who wrote the article us... |
H: Is the SWER (single-wire earth-return) system dangerous? If not, why not?
When a live/hot wire touches the Earth ground, it creates step voltage and so it's dangerous to walk on ground during this fault. But in a single-wire earth-return system, we use earth/soil as conductor. So why isn't a SWER system dangerous? ... |
H: Switching Multiple Constant Current Regulators
I'm looking to setup a grow light system but I'm a bit of a beginner. My aim is to be able to turn on/off two series of LEDs from an Arduino Uno.
At the moment I have two constant current regulators (XL4015E1) for powering the two series of 3W Leds, as seen below.
I w... |
H: Load sharing MOSFET problem
This is the schematic of the circuit:
Power-supply1 is an external supply.
Power-supply2 is a 3S Li-ion battery.
AIM OF THE CIRCUIT: When an external power supply is connected, the load should draw current from the external power supply. So MOSFET should be turned-off in this situation.... |
H: Hardwiring USB - Switch data lines?
I am trying to hard wire a USB host to a slave, but i don't know if there is maybe a data line switch that would be there if I used a USB cable. I thought I might have to because I looked at some USB wiring and if a USB cable was wired so that the wiring stayed the same along a l... |
H: Zero current draw voltage divider equivalent
The problem: I am trying to read a DC analog voltage (from a battery) by an ADC on a microcontroller.
This can be done by a voltage divider, but I am looking for a solution that has zero, or near zero current draw. This is necessary to reduce power requirements (and ext... |
H: IC that will hold LED ON after single button press, turn OFF after another button press?
I am trying to design a circuit that uses 6V coin cell battery to turn on and off a white LED. A single button press should turn the LED on/off. Would an analog switch of some kind accomplish this? I would like the component to... |
H: Difference between phase and polarity?
Long story short, I did a bit of a career change, I'm now doing electrical engineering with an architecture firm instead of embedded systems. So I've jumped from the simple world of DC to the land of AC electronics and it's definitely different considering I never took a phaso... |
H: How do I power a board multiple sources including USB without exceeding the capacitance limit on USB power?
I'm not entirely sure how to ask this because I'm just a hobbyist . . . but here goes.
My daughter and I are working on a PCB for next year's pinewood derby car (I call it the Carduino). It's base on the ATm... |
H: Using the word tension in place of voltage
I was reading this paper on electrolysis and on page 2 on the third line of the second paragraph it reads:
In each cell there will be a tension of 4.5 volts and a current of 25
amperes will pass;
While it may be obvious that tension would mean voltage, I'm curious as to ... |
H: Is it OK to use a 2 pole RCD on each Line of an unbalanced 3 phase installation
I have a building that is mains supplied, but has a 3 phase back up generator-- black outs are almost daily here. There is no 3 phase equipment in use.
The current instillation is about 12kva, but the 4 pole RCD being used is too small... |
H: Why is my small DC motor so weak with this N-type MOSFET in this simple circuit and 9V battery?
Here is my simple circuit. Any help is appreciated:
When I press the momentary switch, the motor spins but it is very weak. I'm trying to figure out what I am doing wrong.
When I connect it directly, it spins with a lot... |
H: 8 bit Analog to Digital, Then Convert to a 1 to 8 level LED display
Getting back into electronics as a hobby, and I'm giving myself some breadboard tasks and drills to do to refamiliarize myself with both simple analog and digital circuitry.
Here's what I want to do: 5VDC source, with a pot (say, 100k). I want to t... |
H: How is this encoder supposed to be wired?
I have this encoder: https://www.mouser.com/ProductDetail/Bourns/PEC12R-4020F-S0024?qs=sGAEpiMZZMsUJpHmmVieqHTo0n9kjhYO9zCZFTxUfRg%3D&countrycode=US¤cycode=USD
and I am trying to figure out how it is supposed to be wired.
I think the A & B terminals are supposed to be... |
H: Differential op-amp battery cell monitor circuit odd behavior
I'm working on a three cell LIPO battery cell voltage monitor using three differential op-amps.
I had the circuit I designed below printed on a PCB and have assembled the board, but I am getting strange results on the output of op-amp 1 (Op1_output.) Op2... |
H: Does a 220V AC fan emit much more EMI noise than a 24V DC fan?
I've been discussing this with other colleagues for some time now and we can't reach a conclusion. Also searched on internet but didn't find a good article or proof that in fact a 220V AC fan will emit much more EMI than a 24V DC fan. For me this looks ... |
H: What does impedance in datasheets mean?
Can anyone explain impedance in a datasheet? What does this mean:
(50 uH + 5 ohm) || 50 ohm
Line impedance stabilization network (LISN). Like this one : schwarzbeck.de/Datenblatt/k8124.pdf.
AI: If you post the datasheet that you're reading I could answer it with more confid... |
H: Difference between the excitation current of a transformer and the magnetizing current
What is the difference between the magnetizing current of a transformer and excitation current?
The doubt came to me when I was reading a book and it explained the real model of the transformer and considered the excitation curre... |
H: Powering 12 V LED strip from a 3.3 V esp32 including PWM
I'm developing an automation board and want the facility to PWM dim a strip of LEDs up to 5-10 amps @12 V.
These are plain 2 wire LED strips, positive and negative, nothing special.
My esp32 will be powered via a buck converter from a variable input and I wi... |
H: Latching an analog signal on a trigger event
I am looking for sort of an analog equivalent of regular digital latches. I want it to mirror its input (voltage) to its output (voltage, with or without gain) only at a trigger edge/pulse and maintain this output until another trigger event. Basically, an analog flip fl... |
H: How will BSS138 work if I apply the same voltage to both the LV (low voltage) and the HV (high voltage)?
I'm making a circuit to connect to a UART pins on a mini PC. But it is possible to use different mini PCs, one using 3.3V TX and RX levels and the other 5V.
I have BSS138 and I'm wondering if I could use a jumpe... |
H: What is the difference between impedance and reactance?
I mean how are they physically different? What does it mean to have imaginary numbers in the reactance?
AI: Reactance only refers to the imaginary component, whether it is on its own or paired with a real resistance.
Impedance just implies frequency dependency... |
H: Tapered line for a SP4T RF switch
I need to use HMC241AQS16 brand RF SP8T switch on an FR-4 board. The RF ports of this QSOP package integrated circuit have 50 ohms impedance. But there is a problem, the leads of the chip have just 0.41 mm in width. My original 50 ohm transmission lines on a FR-4 are about 3 mm in ... |
H: How to parallel shunt resistors with 4-terminals (Kelvin connection)?
I would like to use multiple shunt resistors in parallel to reduce power dissiption to the power specified per resistor. However these resistors are 4-terminal resistors WSL40265L000FEB. The reason being I need the accuracy they provide. My CS am... |
H: When do I have to worry about shorting? (Coin cell battery assembly)
At work I assemble coin cell batteries (lithium metal) inside a glovebox. I'm a bit confused as to when I do and do not have to worry about shorting. For example, say I'm making this battery:
Cathode: LCO
Anode: Lithium metal
There is various advi... |
H: STM32F723 : correct connection for VDD12OTGHS pi
I'm currently designing a PCB for my caving robot.
Initially, I wanted to use a STM32F722ZET6, but as it is currently out of stock, I'm switching for a STM32F723ZET6.
There are a few pins displaced, and 2 GPIOs that are replaced by 2 "special pins" : VDD12OTGHS and O... |
H: Do high-speed asynchronous to synchronous UART converters exist?
I need to send synchronous serial data with control characters and 8b/10b encoding at about 5Mbaud - and I need to send that from a laptop; I do have UART ports which can keep up with these speeds, but they're not synchronous so I don't have a clock s... |
H: Limit voltage follower output using Zener diode
I created a voltage follower/buffer for a first stage transimpedance amplifier and want to limit its maximum output voltage to roughly 3.3 V to protect the following ADC from voltage spikes.
Simulating the circuit on Falstad, I get 3.3 V of output voltage when inputti... |
H: High voltage +170V based on NE555 design - short circuit
I love Nixie tubes so I decided to build a Nixie clock.
I am a beginner. I have one successful design that electronics SE helped me design.
That PCB was based on through-hole components and an Arduino.
Now I decided to try a SMD design (and I think way more c... |
H: Brushed DC Motor Closed Loop Speed Control Under Load
I've designed a PI controller to control brushed DC motor speed between 0.6Hz - 6Hz (RPM:36 - 360). When I control the motor speed at 0.6Hz (approximately 4.0V supply and 60% PWM duty), it can rotate at target speed as I expected. But for this target speed (0.6H... |
H: How do I increase the current a battery delivers?
Let's say there's a 2Ah battery with a C rating of 2C. So this means that I could discharge 4 amperes for half an hour at best.
Now, there is a default current that we get from a battery right? How do I increase the current discharge for this particular battery? Is... |
H: Effect of impedance on noise immunity
I read an introduction for the CMOS inverter from [1], and it mentions: "In steady state, there always exists a path with finite resistance between the output and either VDD or GND. A well-designed CMOS inverter, therefore, has a low output impedance, which makes it less sensit... |
H: What to do to stop PWM after N pulses in STM32?
I am using an STM32Cube IDE and HAL library to generate two PWM using two timers.
I want these two PWMs to stop i.e go LOW after one of the PWMs has generated N pulses.
I don't know what to use in what mode.
Should I use a third timer with a mode or something else?
ED... |
H: If I just keep decreasing the resistance of the wire between the load and the battery, does that mean that the current flow is increased?
If I keep decreasing the resistance of the wire connecting the load and the battery, will the current flow increase, until the maximum current level the specific battery can give... |
H: Frequency of a ring oscillator using transistors only
This is the standard design of a NOT gate without much sophistication:
I've used R1 = 1k \$ \Omega \$ and R2 = 100k \$ \Omega \$. The transistor model I use is BC107B.
In an attempt to create a seven-ring oscillator, I've connected seven of such NOT gates in se... |
H: Self programming fails on ATmega2561
We've been programming a custom Board with an ATmega2561 via a serial (RS232) connection for years, mostly without problem.
We're using a custom bootloader that is closely based on recommondations in the datasheet and application notes.
Interrupt routine writes data into 64 Byt... |
H: On mains AC, why is neutral different from live?
In AC, we have a 50hz 'live' connector rotating from -240 to +240V at 50Hz, right?
As a child, I imagined this is like someone taking a battery out of a flashlight and reversing it 50 times a second. With a battery reversing, positive becomes negative, and negative ... |
H: RF direction finding
Is it possible to build a system of antennas to find the rough direction of a radio frequency emitter such as a WiFi router, a Bluetouth tag, or, a 5G cell tower?
I cannot use distant antennas to use triangulation. If several antennas are needed, they should be close (within 50cm) to each other... |
H: Why are many radar antenna arrays not rectangular but rather octagonal÷icosagonal?
I've seen that, despite some phased array antennas are rectangular, many of them are not. They are octagonal, decagonal and even more.
Why are they built in this way?
AI: There are several reasons for those shapes.
First, the cut of... |
H: Trying to understand this electrical diagram schematic on an AC motor that I have, particularly symbol between yellow and black wires
I'm new to electrical wiring and I'm trying to learn a bit and came across this AC motor which I have that isn't hooked up. I have attached the motor wiring diagram:
This is also t... |
H: Do I need to connect all pins of USB 4085 or can I use only the first row?
I would like to add a THT USB-C for hand soldering to my PCB. I found this on KiCad:
https://gct.co/connector/usb4085
(Full schematics)
D+ and D- are differential pairs.
Do I need to connect all of them or can I use only the first row?
If I... |
H: What component is like a jumper, but doesn’t actually conduct?
I suppose you all know jumpers, those little things you put on top of 2 male, 2.54 mm pitch, pins. They serve to connect the 2 pins together (often used to "configure" a prototyping board), for example selecting a voltage or I2C address:
My question is... |
H: Cascaded Op Amp Problem
I have seen an op amp problem and I made a representation of it in LTspice.
Attention! Vout is not grounded, I had made a mistake. Sorry for this.
The problem wants us to find Vout. To solve it, I used KCL and Nodal Analysis. Here is my solution:
I feel like something is wrong or missing. ... |
H: Do I need shielding on a long, power-only USB cable?
I want to use a long, 3m USB cable to power a board with an ESP32 WROOM module. Power draw is less than 100 mA.
I am not using the data pins on the USB cable.
If the cable is NOT shielded, should I expect issues with EMC?
I need to be FCC compliant (FCC Part 15)
... |
H: Identify diode part number
This is a diode from a small 5 Vdc power supply that is part of a powered subwoofer. Main supply voltages of about plus minus 45 Vdc look to be okay but the little 5V supply appears to be dead.
A quick check shows that this diode is shorted. Markings are (top) V1H (bottom) P133L
Google... |
H: I know how to do it with K Maps but how to solve it without using them
Let X=X1X0 and Y=Y1Y0 be unsigned 2-bit numbers. The output function F = 1 if X is
equal to or less than Y and F = 0 otherwise. Find the minimized expression for F?
AI: This question looks like homework, so I'll nudge you in the right direction.... |
H: Why does current prioritize capacitor in a parallel circuit
I am providing a 5V to my circuit.
There is 10 µF capacitor in series with a 100 kΩ resistor and they are in parallel with a NPN transistor and LED.
I am trying to understand why the base of thetransistor only gets current when C1 is full.
Why does no/some... |
H: When a BOM specifies 2x capacitors to be used together, are they used in series or parallel?
Looking at the typical application example on this datasheet you can see that for COUT they specify 2 x 10 μF capacitors to be used although the schematic only shows the symbol for a single capacitor on COUT.
Why doesn't t... |
H: Perturbation and linearization for boost converter
I'm developing a boost converter (runs with DCM, and has \$n\$ turns ratio transformer) for uni which controls the input voltage with a constant output voltage. I'm at loss on how to get the transfer functions of the converter. Averaging the circuit is what I belie... |
H: STM32 bare-metal programming - Memory addressing in 32-bit system - memory offset
I am coming from a mechanical background and some Atmega experience, now doing some bare-metal programming courses on ARM processors. So far it is looking great, digging into documentation about uC functional structure, toggling bits ... |
H: What would happen if earth ground and the PCB ground came into contact?
So I have an ATX PSU that I'm converting into a 12v, 5v power supply. I also have a group of 4 USB ports from an old computer that I connected to the 5v line of the ATX PSU. Unfortunately, the USB casing is connected to the common ground (of th... |
H: Difference between a relay and a fault passage indicator (FPI)?
What is the difference between a fault passage indicator (FPI) and a relay (for example relay 50, 51, 67N) ? Are they the same thing?
AI: A fault passage indicator is used by electric utilities to visually indicatd (such as by a mechanical flag) that a... |
H: How do I display voltage on a Keysight DSOX1204G?
On page 37 of the manual, It clearly indicates the voltage in the top left hand corner of the screen
DSOX1204G manual
and hints that it would display the voltage for each channel next to the channel number.
But my screen does not show that. My screen has a 500ma rea... |
H: Two power supplies to ensure a specific voltage
I am designing a soft start circuit for my bench power supply.
The voltage input of the IC that control the mosfets in the circuit can not be under 4.3 V even when the output of the power supply is under 5 V.
I've been doing some research on the web and I found a circ... |
H: Are systems with more zeroes than poles really non-realizable?
I have learnt that systems whose transfer functions have more zeroes than poles become non-causal and thus non-realizable in practice for real time implementation.
But an op-amp differentiator, like the one in the figure below, is certainly realizable a... |
H: Battery charge current
I set up my power source to 4.2 V @ 0.1 A. If I connect a Li-ion battery I get a current of about 0.1 A. If I connect a resistor of about 40 Ω I get a current of about 0.1 A. But if I put it all together (connect battery through the resistor) I get a current of about 10 mA.
In the first place... |
H: Is the voltage drop smaller in three-phase circuits?
If the same power and the same distance are used for a single-phase and a three-phase circuit. Will the voltage drop of the three-phase circuit be smaller?
AI: In general, the power transmission efficiency will be higher for a three-phase circuit compared to a si... |
H: Can a smart battery charger power a 12V windscreen wiper motor?
I have a very old windscreen motor attached to a rotisserie which I would like to run. I was told that I need a battery charger, but most of the ones I can find are "smart" ones. I have a 2A smart charger and it doesn't work, reading a bit more it seem... |
H: reading data from L3GD20 gyroscope sensor using STM32L4
I'm learning how to control the L3GD20 gyro. sensor using STM32L4. In the datasheet of the sensor, Figure 13 shows how the master device should communicate with the sensor via SPI. My goal is to read the 'who am I' register at 0x0F. The register value is expec... |
H: Specifications of infrared LED VX-301
During clean up I found an old pack of IR LEDs.
They were bought ~ 20 years ago from the German electronics retailer conrad.de. The order number is 185540, but unfortunately, the store doesn't know that component, anymore.
The part is named VX-301.
I couldn't find any datasheet... |
H: How is the upper and lower cutoff frequency found here?
I got this from an IEEE journal (letter) regarding high frequency LLC converer control.
AI: Assume the two cut-offs are far apart, and consider the cutoffs at V/I = G/2.
Set s=0 ("very low") for the Ls/(N^2R) terms, and the G/2 cut off is where 1/(RCs)=1.
Thi... |
H: Understanding HD5522 logic supply voltage requirements
I'm working on a schematic for an yet another Nixie IN-12 clock using a Raspberry Pi Zero 2 and HD5522 32-channel serial-to-parallel converter with open drain outputs to sink the Nixies.
The HD5522 Datasheet says its Vdd is -0.5 to +15V but recommends 10.8V to ... |
H: Flaxseed oil as insulating oil for wires
I've bought clothed wires which look like vintage wires found in old audio equipment. I was expecting they are 'oiled' or waxed but they visually didn't. Now I got flaxseed oil and olive oil available and I prefer to use flaxseed oil for starting. I'm planning to sink those ... |
H: Simulating a RC Phase-Shift Oscillator in LTspice
I'm having some difficulties in simulating this circuit in LTspice. I'm using op amps in the inverting configuration and buffers between each stage but it's simply not working. The simulation runs for several minutes and then the outputs of the stages come out all m... |
H: Minimum wire gauge with vibration
I've heard that there is effectively a minimum wire size for vibrating environments. In other words, when designing wires that will experience vibration (in my case, an automobile), it's recommended to make all wires 24 AWG or larger, regardless of the amount of current they'll pas... |
H: What happens if I exceed the load my PSU is designed to deliver?
I want to use an old PSU I have for studying electrical engineering; to power my circuits. What will happen if I place a 0.6Ω load on the 12V output of a PSU rated for 10A?
I'm sure the PSU will heat up, but will it deliver its max current or will it ... |
H: Can an FPGA connected to a CPU via PCIE access peripheral devices?
Is it possible for an FPGA connected via PCIE to a CPU, to directly access peripherals (USB Ports, data, Ethernet, etc) connected to the same CPU via a chipset? I had an Intel based system in mind, with a x99 motherboard or something equivalent.
If ... |
H: What is the output voltage of this OP amp circuit?
I'm trying to solve (b):
This is what the solution manual gives as an answer:
However, this seems a little off to me. I tried using nodal analysis to solve this problem and I get the following result.
Where is the mistake?
AI: I found my mistake. In my step 1, I... |
H: Help me to understand this schematic
I found 220V AC to 12V DC - 30A power supply schematic:
My question is, where Ib1 current goes (where base pin is connected)?
Edit:
Here is one more schematic with same strange base pin connection:
Edit:
Is it same as:
?
AI: With no load resistance, no current flows out of t... |
H: Understanding the DTFT
So I am taking a signal processing course in EE and my professor is an Engineer who really likes math however his book which we use for the class falls in the dreadful purgatory of math books in my opinion: too "rigorous" to be intuitive and way too abridged and takes leaps which make it impo... |
H: Controller security
What is the general approach used by the military to safeguard controllers that fall into enemy hands?
Let's say the controller needs to interpret radio / wireless signals to do it's job. But it could be any job I suppose.
What approach is used to prevent reverse engineering of the logic that i... |
H: How do I simplify microcontroller-based prototype into a sensible production-like circuit?
First some context: I'm an IT person by trade, and I dabble in electronics as a hobby. I have rather limited experience - apart from some toy circuits I've only made a single "production" quality installation, a lighting syst... |
H: Choosing the meshes in a circuit with a given tree
I have to use mesh analysis to write down the independent mesh equations. I already did this with the same circuit but with a different tree. Now I have to do it with this tree, and I have no clue how to take the meshes correctly. Can someone give me a hint?
AI: Th... |
H: Does a boost converter affect the life span of the source battery?
Will using a 3 to 5V booster IC affect the power capacity of the battery I use in my circuit? as in, will it consume more power?
AI: No, not directly, the battery capacity is a property of the battery.
The boost converter is just a device that chang... |
H: Conditioning current pulse signals
There is an instrument outputting pwm-like current pulse trains proportional to its rotation speed. I convert the output current pulses to voltage pulses by a shunt resistor to be read by a DAQ hardware. Pulses are sampled with 12kHz. The software detects the rising edges and ca... |
H: Should a Computer Science student learn FPGA
I'm a Computer Science student, I know CS is more about algorithms, Theory of computing, Data structures, Artificial intelligence, etc. But I think CS student must also have a basic understanding of Hardware design. Recently I'm taking VLSI course and I got some interest... |
H: What happens if the primary and secondary side of a transformer are short circuited mistakenly?
I have described the condition in the transformer picture I have attached. Will the transformer still function in this condition?
AI: If the primary and secondary turns are identical (i.e. a 1:1 turns ratio) then the tra... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.