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H: How to route current for ATE?
I have many test points on a board, a small DAQ, and an SMU that I can program with LabView. Depending on the test, I need to change which test point the SMU is sending/measuring voltage or current.
To do this, I figured I should use a series of analog switches, and control the switch... |
H: What is the working and reactive power in this circuit
i need help with solving this task (it's on croatian but i will translate): https://ibb.co/sb0cnsx ,it says what is the the working and reactive power for the given cirucit (Xl = 3 ohm ,Xc = 2ohm R = 2ohm, u(voltage) = 100)?
I found the equivalent resistance fo... |
H: Electronic load, Problem turning MOSFET on
I am trying to make an adjustable dummy load to test a 12V supply, I’m having trouble with the op-amp feedback circuit.
Attached is a simplified schematic. I have tried lots of things and stripped it down to this.
Basically when +In of the op-amp is 0V, the output of the ... |
H: What is "Low Pulse Trigger" and how to use it?
I picked up some of these cheap Chinese Bistable relays and I am having trouble understanding how to get them hooked up. Do I put 5vdc + on VCC and 5vdc - on GND then use a low voltage pulse, such as 3.3vdc, to trigger it? I'm trying to use it with a Raspberry Pi.
AI: ... |
H: Problems with dc motor driver design: Mosfet fail
I made a brushed dc motor driver. The motor speed is controlled with PWM (from an Arduino). The motor that I'm using draws 3 amps without load.
This is the schematic:
As you can see there are two N channel mosfet in a parallel configuration.
The first problem that ... |
H: How to specify a value for each bit of the reg in Verilog?
I want to declare a reg of 8 bits and set the value for each one of the bits separately (based on another "counter" reg) inside an always block using Verilog.
Here is what I thought:
module readvalue (
button_1,
button_2,
value,
counter);
... |
H: Reading current memory image from a micro controller
I have the MPLAB XPress Evaluation Board, which has the PIC16F18855 microcontroller on it. The way to program it is just to copy a .hex file through the serial connection, which makes the bootloader update its memory image.
Is there a way to directly read the cu... |
H: Proper voltages from same source
I'm building a small electromobile. I was planning on using a car alternator as the motor, however I'm now looking into buying a 48V 500W BLDC motor.
The problem is I'm not really sure how to manage the difference in voltage between what the motor requires and the rest of my circui... |
H: Will leaving 1 of the 3 GND pins on the ATMEGA328p ungrounded cause any problems?
I am creating a circuit using an ATMEGA328P and i am unable to ground one of the 3 ground pins (other 2 are fine) due to limitations of my design. I have tested the IC with a multimeter and the pin does seem to be connected to the oth... |
H: Logic gates for relay coils analogic control signals
I have 2 external signals arriving to my board, A and C. B is generated inverting A. They 3 will be used for generating 3 switch control signals: A', B', C' at every point (there will be 8x3 24 switch). Every one will be 12V or 0V. 12V state means to activate the... |
H: I want to measure 50 miliamps by multimeter which range i should select?
I have a multi meter I want to measure DC 1-50 milliamps which range I should select by the knob?
Also where I need to plug in 20A or mA?
AI: Use the 200m setting from the orange section with an A with a solid and dotted bar above. You can fin... |
H: Lack of 'determinism' in Ethernet bus
While reading this website, I found out tha there is lack of 'determinism' in the Ethernet network bus as compared to some other buses like 1553. What I understand is that Ethernet is a single master full duplex serial data bus. But I cannot understand what is reason for it to ... |
H: What's the maximum time an interrupt service routine can take to execute on ATmega328P?
I have an ATmega328P that checks if a button was pressed via pin change interrupts. Now, I want to turn on an LED for 200 ms.
Can I just turn the LED on, wait 200 ms and turn it back off in the ISR like in the following code?
IS... |
H: Values of components in ACPL 337J
I was going through datasheet of mosfet gate driver. I wonder why is the value of component the specified one only. On page no. 13 fig 23, why the value of resistor between pin 3 and pin 6 is 10k ohm only and not any other value? Similarly, capacitors between pin 6 and 8 are of val... |
H: Build electrical characteristic for gas measurament via IR sensor
I'm building a CO2 measurement unit via Arduino and I'm the phase of choosing the sensors.
I've found out this IR sensor that, thanks to an emitter with WL of 4.26um is able to output a voltage proportional to the concentration in air of CO2.
To cali... |
H: Average Voltage of a 3phase full wave bridge diode rectifier derivation
Why three phase bridge rectified waveform is integrated over the half period \$\pi/6\$\ to find the average voltage? Should it not be integrated over \$\pi/3\$\, as the wave form repeat itself after \$\pi/3\$\ which is the time period of this w... |
H: Replacing a missing capacitor
I've managed to break off a smd ceramic 1206 capacitor of a motherboard I am working on, I'm am new to electronics, so be gentle! Anyway this damn capacitor has vanished into the place where all missing tiny components seem to go! I cannot find any schematics for the board to see what ... |
H: Is there a direct to PCB punchdown Ethernet connector?
I’m attempting to design a small board that splits 802.3af and provides both data and 5v power to an MCU on the same board.
I can find plenty of ICs with reference schematics for the splitter part - but they all expect an RJ45 port, which I understand contains ... |
H: How to wire a normally open switch to a recoil start engine with no external battery?
I am making an engine toggle switch for a recoil-start engine using two switches wired in series for safety. The engine will shut off only when two "kill" cables on the front have been connected. In the picture below, I have lengt... |
H: Do RCDs work for DC systems?
I'm designing a product powered by an alternator with a DC regulator that will provide me with 24 V DC and something like 100 A rated consumption. Do RCDs protects against earth leakage current in DC circuits or only in AC systems?
If not, how should I protect my system agains current l... |
H: What is the peak current for CR, LIR and AA batteries?
I'm working on a project that requires low energy consumption. In standby mode, it will consume about 11uA. However, when it starts working (it will transmit data in RF), the current goes up to 121mA. This is going to happen 4 times a day, and the peak current ... |
H: Colpitts / Clapp oscillator crystal drive level
simulate this circuit – Schematic created using CircuitLab
As I understand this circuit has some initial gain at startup, then as the oscillation builds up gain goes to unity at some moment. How to modify such circuit to change crystal power dissipation from lets say... |
H: Does a potentiometer need a resistor in series between power and ground?
I have a potentiometer I use with a circuit to get data readings. This circuit is connected to an arduino mega 2560. I was wondering if I need a resistor in series with the potentiometer? Attached are two picture of what I mean, sorry if the c... |
H: Lithium Ion Battery Charger and Power Path Management IC
I am to analog electronics. I am building a circuit that has a lithium ion battery. I understand the importance battery charger in battery management.
My question is how does a designer set specifications of the battery charger IC. What tools are needed?
I w... |
H: PIC12F675 GP4 doesn't work
I'm using a PIC12F675 for a project, and everything works fine except one thing. GP4 does not work as digital IO. I've looked at the configs and the code a lot, but couldn't find anything.
Config:
#pragma config FOSC = INTRCCLK
#pragma config WDTE = OFF
#pragma config PWRTE = OFF
#pragma ... |
H: Placement and values for ferrite bead/capacitor ESD protection / transient suppression filter
I've been researching but found it difficult to find a clear answer on this. I need to add ESD protection to my circuit, in this Texas Instruments video it talks about combining a TVS diode with a FBC (ferrite bead/capacit... |
H: Is the frequency response of a circuit only valid for steady state (phasors)?
This is my first post. I just finished a course about advanced circuit analysis techniques (the content was taken from textbooks by Sadiku, Hayt and Irwin.) As you know, phasors are used to solve sinusoidal AC circuits (and also non-sinus... |
H: Serial communication between STM32F4 and PC -USART-
The question I will ask now is not about how to solve something, I am currently able to make the connection as it will be mentioned below, but my problem is I really did not understand WHY ? Thanks in advance.
Hey, I am trying to connect my STM32F4-DISC board to ... |
H: Why does resistance reduce when a conductive fabric is stretched?
I just purchased some conductive fabric and noticed that stretching the fabric reduced its resistance. This seems counter-intuitive since stretching a wire leads to an increase in its resistance. I have also found this video where you can see this ha... |
H: STM32F411VE Custom bootloader USB de-Init issue causing Jump to app fail
I'm developing a custom a bootloader on STM32F411VE MCU which must download a .bin file from USB key and flash it into the application sectors of flash memory.
Following the examples provided with cube libraries i managed to open correctly th... |
H: Half Bridge Inverter Effect of Load on waveforms
I have made a half bridge inverter, in the lab and on simulation software. I have used the gate drive IR2110a and am supplying it with a square wave pulse and it is then applying the gate voltage to the high and low side MOSFETs (ho and lo on the diagram).
I have fo... |
H: Rectified current transformer output is asymmetric
I'm using a current transformer (CS4200V-01L) to measure the current in a half-bridge. I'm facing an issue where the signal out of the current transformer is asymmetric, almost as if the current transformer is DC biased. This is the rectified signal, measured acros... |
H: BJT Common Emiiter RF-Design Simulation
I'm trying to learn about RF amplifier design and build a common emitter stage with an BFR92P.
And now I'm struggeling with the simulation in LTspice, or maybe with reality.
As you can see attached is a simple common emitter testcircuit, that I have tried to optimize . .asc ... |
H: RS-232 to I2C communication
I'm trying to establish communication between two boards, one of which has an RS232 output and the other with an I2C input. I've looked for adapters online and the only ones I've found seem to be RS232 to USB, which is not what I'm looking for. Is there a limitation in the technology tha... |
H: Is Brownout Reset Circuit a standard or optional safety feature in an MCU?
I've been using STM32 MCU's without paying attention to the BOR circuit:
Some datasheets indicate that the device has a built-in BOR circuit but some doesn't include such an information.
Is it always a MUST to have a BOR circuit? Is it a s... |
H: Am I testing diodes properly?
I decided to test some diodes that I have, using a multimeter to measure their forward bias voltage. I set my multimeter to voltage test and connected the diode across:
I tested a bunch of different diodes, both germanium and silicone type, so I expected to see voltages around 0.2 - 0... |
H: How to correct this solder?
I have repaired this circuit from a fridge but the soldering that I have marked in red seems to have pulled away from the copper track. That is because when I tried to replace the capacitor that was there, I had to pull and that was the problem. I have almost cut the track.
The circuit i... |
H: How to connect solar panel to boost converter
Here I design a boost converter with 5 V input and 19.37 V output
and it is working very well when the source is DC battery
but when the source is a solar panel with also 5 V output I have no boost for the voltage did anyone know why this happens??
Here is the solar pa... |
H: What connectors should I use with 5V DC current?
In a personal project, I need to power several 5V appliances which, together, use up to 12A.
I want to use a 60 inch cable between a case to which those appliances are connected, and the transformer with 230V AC in and 5V DC max. 30A out.
When I look at the specifica... |
H: How do I figure out the equivalent resistance of a network of resistors on a microcontroller?
I am trying to figure out what the equivalent resistance would be at a certain point in a resistor network given different conditions of the GPIO pins they are connected to.
Configuration 1 is when the OUT pin on the micr... |
H: Why do stoves need not be connected under the earth leakage?
On some stoves I've seen stickers stating that the stove doesn't need to be connected under the earth leakage... Which is rather confusing since we need to earth it in case of earth faults.
I'm just struggling to understand why a stove shouldn't be under... |
H: Circuit requirements for 'fixed' output switching regulator
I am considering using one of these switching regulators in a circuit:
TPS560430YFDBVR ( output type PWM )
TPS560430X3FDBVT ( output type 'fixed' )
The datasheet for both are the same thing:
http://www.ti.com/lit/ds/symlink/tps560430.pdf
The datasheet g... |
H: Do you really need a satellite dish to communicate with satellites?
I'm doing a project where I have ground sensors that detect seismic activity and report their GPS coordinates via APRS if seismic activity is detected. I'd like to do the APRS over satellite.
The sensors are small and utilizing a satellite dish for... |
H: Ondulatory routing in Raspberry Pi
I bought a Raspberry Pi and I noticed some of the routings are not straight lines but instead they make a funny ondulatory shape (see picture at the right and bottom of the processor).
I'm not sure the reason of this shape. I have two guesses:
It makes this signals slightly delay... |
H: NE555 power controller not working with big motors
simulate this circuit – Schematic created using CircuitLab
Backstory:
Ok, so I thought that a making a PWM controller would be a fun weekend project, it's been a week now and I still can't make it work properly. The circuit I'm using is from this website.
The prob... |
H: P-MOSFET failing
I am using this solution to drive a large (huge) relay on a boat.
The system works well for months on end, but eventually the MOSFET (T2) dies suddenly.
I have modified the schematic to include the modification suggested by Jack Creasey and others (circled in RED, not part of original design), as ... |
H: Why are overhead electric wires allowed to have higher voltages than third rails for rapid transit railways?
I hope this question is on-topic for this site.
The city I live in (Chennai, in India) got a rapid transit metro rail a few years ago that uses overhead electrification of 25kV, 50Hz AC voltage to power the ... |
H: Amplifier Audio Ground to Signal Ground
I am using a VS1053 (on a SparkFun Music Maker shield) to provide audio for my project. I am taking a line out signal and inputting it into an op amp for signal processing, ultimately being input to an Arduino.
The op amp(s) are using Vcc and ground from the Arduino as their... |
H: 555 IC astable mode - Does the voltage generally affect the frequency?
I'm new to electronics, and I'm messing around with the perennial 555 IC. I've been introduced to the following formula which allows you to determine the frequency of the output when put in an astable mode:
f = 1.44 / (r1 + 2 * r2)C
I noticed ho... |
H: ESP32 with FTDI programmer
I recently broke my USB port on ESP 32 ...
... so I need somehow program it. I have this FTDI programmer. ...
I tried to flash it (I pushed boot and EN button together and when Arduino IDE finished compilation and started flashing, I released EN and then boot button.)
Connection:
ESP 3... |
H: Relative difficulty between leading zero counting and addition
Consider a 32-bit or 64-bit ALU that must implement both count leading zeros and integer addition, with low latency (say a few cycles), implemented on a modern high frequency logic process.
Which is generally more complex, a fast adder or a fast leading... |
H: Does anybody have PCIe (3.0) aka PCI Express module card edge connector technical drawing?
I was searching through the internet to find PCI Express card edge connector footprints / technical drawings / pin spacing / layout of the module cards that you stick in these connectors you can find on a modern PC/server mot... |
H: seek resources in design amplifier
I'm an electrical engineering student in my summer training. My adviser is busy, so my training is self-learning, I'm supposed to learn RF circuits, ADS, and finally, design an amplifier do some cool things.
To reach my trainee goal designing an amplifier in RF, can you recommend ... |
H: 74LS74AN Binary Up-Counter
I have an issue with my binary up-counter using a 74LS74AN D-Flip Flop
The issue is the following:
I am trying to toggle the flipflop state by sending it a 1Hz Square wave (5V Peak) to make it toggle every clock cycle (Rising Edge triggered)
This is the schematic I came up:
And this is ... |
H: Where does return current flow for a differential signal?
As far as I understand, return current flows the "negative" channel for a differential signal connection. Only if it is not balanced well, there might be unwanted return current in reference GND or power plane.
But some say the return path for both positive... |
H: What is the purpose of Vih and Vil in the comparator's datasheet?
Looking into the MAX999 datasheet I can not figure out how to utilize information given for the Vih and Vil
Logic-Input High --- Vih --- (Vcc/2 + 0.4) min
Logic-Input Low --- Vil --- (Vcc/2 - 0.4) max
The rest of datasheet says nothing about inputs... |
H: Do electronic fiber optic selector switches exist?
From my research, I have been having a tough time finding and specifying a fiber optic selector switch or multiplexer. Do fiber optic selector switches exist?
Background - Simple
I have an application with a not-cheap sensor that does the following:
Sensor emits ... |
H: please explain this fourier equaton
reference from here
why are there 2 exponential terms on right side of equation in red box ?
i know euler identity but why does ,the left side is trigonometry form when n=1 equal to exponential form n=1 + exponential form n=-1
AI: The n= 1 trig form must equal the sum of the ... |
H: Digital electronics - how does a circuit determine when some element (like adder) is done? (delay handling)
Take for example a ripple carry adder, how does a circuit handle delays of some elements?If ripple carry adder starts working from some clock cycle, we can't expect that it will have correct results on the ne... |
H: feedback loop component dc converter
Consider the schematics below, the switching frequency is 250KHz, So, The cross over frequency be 250/5 = 50KHz. My ADC is able to sample at 1MS/s which is good as from the SNR perspective.Now, the doubts are below
For ADC selection-sampling rate the switching frequency should ... |
H: Why is the collector feedback bias popular in electret-mic preamp circuits?
I got some simple electret microphone modules and I've been experimenting with audio amplifiers. I googled to find some example circuits, and I found that most of them resemble the circuit above. I built this one and it works fine. If I'm ... |
H: What components would I need to build a basic circuit that completes when something is pulled with a certain amount of force?
As an example, a rope tied to a tree when pulled with Y newtons would illuminate an LED but wouldn't when only pulled with X newtons.
I guess what I'm looking for is a basic force meter.
AI:... |
H: What kind of amplifier design is this?
I am dissecting a design and I'm trying to wrap my head around the design pictured below. It is based on the TL064C amplifier and takes in single ended audio and outputs single ended audio as well.
What kind of amplifier is this?
Here's the schematic:
I believe R15/C1 & R16/C... |
H: Intriguing obsolete(?) PCB manufacture techniques in this old MSX
Browsing Wikipedia (as one does), I have stumbled upon this picture of a circuit board¹:
Now, when you look at it, there are several things that stand out as being interesting and different to today's commonly used PCB manufacturing techniques.
I ... |
H: Floating input in Op-amp Readout Circuit?
I was analyzing this circuit diagram in a thesis about a capacitive EEG electrode. The author talks about a flaw in the design where there is a "floating analogue input" that is causing the op-amp to go to rail and consequently maxing out the output. She suggests adding a v... |
H: Translating mic sensitivity dBV to dBSPL
In mic datasheets, mic sensitivity is usually expressed in dBV that equates to 94 dB SPL (@1kHz).
So if my mic sensitivity -46 dBV equates to 94 dB SPL, does that mean that if I double the signal by 2 (+6dB), a -40 dBV measurement will equate to 100 dBSPL for that mic?
I mad... |
H: Transformer ratings
What physical factors one needs to take into consideration (like maximum core field and saturation) to rate the "voltage rating" of a transformer?
Suppose that the voltage rating of a transformer isn't known (or you aren't allowed to look at its nameplate), is there an experimental way to deter... |
H: Will this High Frequency AC Signal Generator Circuit work?
I am going to make a variable DC to AC (10-100kHz). The circuit controlled by 2 PWM Signal from microcontroller to drive NMosfet connected to pull signal from two Ferrite core Transformer primary coil end which the CT connected to 3.3V. Here is the circuit... |
H: Sampling Frequency and Bandwidth
If i have a Buck Regulator switching at 200KHz and i want to sample the Voltage and current using OpAmp in tha path connected to ADC(12 bit).
What would be the sampling frequency to measure the signal by ADC?
what shall be the Bandwidth of the OpAmp for Voltage and for current sens... |
H: I2C max pull-up resistors and current sink
I design a system with several devices connected to 400kHz I2C interface with wires.
For now, I get shark fins instead of square waves, so I decrease pull up resistors value. The MCU, which drives the I2C communication is STM32F303, and its datasheet states: "I2C Fast mode... |
H: Why do these modules not include IPEX and trace/chip antenna connections simultaneously?
I'm looking a bluetooth modules for a project i'm working on. I want to have a small form factor version of the board be usable with a trace or chip antenna, and have the option of connecting a external antenna for better perfo... |
H: Bus mastering VS Bus arbitration
If there are multiple bus masters possible in a bus architecture then is it certain that 'Bus arbitration' will take place before a master gets hold of the bus control or is it possible that bus control is handed over to another master without bus arbitration taking place? Theoretic... |
H: Three phase systems - when is potential of a star node equal to zero?
I had to find total impedance of the following three phase circuit with symmetric line voltages:
I've been told that nodes 1 and 2 can be connected because their potentials are equal (zero).After connecting these two nodes, resistor R and induct... |
H: DC Fault Characteristics of a Voltage Source Converter
According to this paper, the three stages in the DC Fault characteristic of a VSC are
Capacitor-Discharge State (Natural Response)
Diode Freewheeling Stage (When source AC gets disconnected and \$V_C = 0\$; Natural Response)
Grid Side Current Feeding Stage (... |
H: Why is this current source with both sides grounded still supplying current
Now if we write a node equation at \$C\$ we get
\$I_C = g_m − sC_μ V_π \$
But my question is, is it correct, how do we define the current through the branch with \$g_mV_π \$ since both of its terminals are connected to ground now, which... |
H: Why won't "wait until a'active" return when the signal a is assigned the same value as before?
For a signal a, the attribute a'active is true whenever a is assigned to - even if its value does not change (i. e. the same value as before is assigned).
In the following example, the signal a is assigned its previous va... |
H: Baxandall tone circuit passes signal through but does not alter its tone
I added an Baxandall active tone circuit to an existing overdrive circuit and I'm having an issue. The signal passes through the circuit/opamp and out to my volume control but the bass and treble controls don't affect the signal at all, it see... |
H: What type of printer port is this?
I just got a currency discriminator (Carnation CR1500) that can be connected to a receipt printer. There is a modular jack on the back of the machine, but I don't know what kind of cable it needs. It won't accept RJ45 or RJ11 connectors. It's taller and thinner than any RJ port I'... |
H: What is the difference between a multiplexed bus and a multi-master bus
The jargon of terms in bus architecture literature is half the difficulty in understanding it. At some places the term 'multiplexed' bus is used while at some other places 'multi-master' bus is used. They both look same to me but maybe they are... |
H: Why is my seconds counter in verilog jumping values behaviour?
I am implementing a seconds counter on the Altera DE-1 Educational Board powered by the old Cyclone 2 FPGA. My plan is to make a 'down-clocker' that takes the on-board 50 MHz clock and produces a 1 Hz clock signal (referred to as the 'pulse'), which wil... |
H: FPGA CPUs, how to find the max speed?
I'm just getting into FPGAs, and if I understand correctly, you are connecting logic gates together using code. So if I design a CPU in Verilog, it should connect some logic gates together and work, but how do I know how fast my DIY CPU can run? What does it depend on?
AI: The ... |
H: Physical implementation of a band pass filter does not match simulations
I am building a pasive bandpass filter with the band pass between 134MHz and 139MHz. It is a third order eliptic filter, with theoretical attenuation of around 50 dB for the stop band and less than 1dB ripple in the pass band. This is the sche... |
H: Removing optimization changes I2C timing
I'm at using SAM E54 Xplained Pro to get temperature readings from a MCP9600 hooked up to a thermocouple over an I2C bus. I'm using Atmel Studio 7 with I2C drivers generated with Atmel Start. I'm using a Saleae logic analyzer to help debug.
The temperature read works fine u... |
H: Is this thyristor model or circuit wrong?
As far as I understand when the thyristor is triggered it should turn on and remain on unless negative voltage applied to its gate. I found the model from littelfuse website.
But I tried the following circuit with the model where I plot gate trigger voltage supply voltage ... |
H: Identification of an AC transformer
I have a broken Philips alarm clock FM/AM radio broken, so I stripped some parts out of it.
One of it seems like an AC converter, but I cannot find any reference/datasheet about it. Do you have any information about this? (or what the meaning of the yellow/green wires are, I assu... |
H: Do I need a 50/60Hz notch filter for battery powered devices?
Given that battery powered devices are not plugged in the mains power, can I assume that there will be no 50/60 Hz frequency noise?
This question came up while thinking about what the circuit for a portable ECG monitor would look like and it seemed obvio... |
H: Common-emitter amplifier up to 10 MHz
For sure not the first time for me visiting this awesome site, it saved me quite a few times - this time, however, I have a specific question ... would be great if someone could help me with this!
I need a software-tunable oscillator with frequencies from 100 kHz to 2 MHz and a... |
H: What's the difference between 74LS00 "gates" and 74LS37 "buffers"?
The TI 74LS00 is "quadruple 2-input positive-NAND gates" and the 74LS37 is "quadruple 2-input positive-NAND buffers."
The pinouts are identical. The LCCC package is documented exactly the same for both and, though the DIP package pinouts are labeled... |
H: On off button for my microcontroller board
Here is my charger unit and voltage regulator for powering a MCU board that I designed. I'd like to ask, how can I add an on/off button which allow charging the batteries even we turn off the system but close the power for the other modules?
My idea was adding a button ri... |
H: What is this small circuit board used for in a 12v light?
Repairing a home-made disco light that was used in a nightclub during the 80's/90's and it consisted of 16 12v 50w lamps arranged on 8 legs.
I have discovered a small circuit board within each lamp which has an LED on the back. What was this small board used... |
H: What are the additional transistors used for in this hex inverter?
I'm learning about electronics and was studying the SN7404 hex inverter schematic when I saw this:
I naively expected just a single transistor (the one in the bottom right) and the input at the base of that transistor to give the inverted input at ... |
H: Find ROM and RAM in .bin file for micro controller
I use the Arduino IDE to compile some code to a 32-bit ARM Cortex-M3 based microcontroller.
The result of the compilation is .bin file. The file is a stripped binary file, containing the RAM and ROM images to be programmed on the microcontroller.
Another possible ... |
H: What data is typically stored on RFID cards and why?
I understand that all RFID cards contain a UID in their memory from manufacture, normally in sector 0. But they also have additional sectors for data storage, my question is what is some example data that would be stored on these cards?
Saying for example that t... |
H: How to infer the max current output of this function generator from its datasheet/specs?
I need to figure out the max current a function generator can output from its signal waveform output. Here is its datasheet. But there is no such parameter here.
The output voltage can swing from -10V to +10V.
But I cannot find... |
H: Correct wiring of Cortex-M 10-pin Debug Connector
The ARM Cortex-M 10-pin debug connector has five interesting signals, in the original PDF they're named:
SWDIO / TMS
SWDCLK / TCK
SWO / TDO
NC / TDI
nRESET
For MCUs which only support SWD and which might even not have SWO (such as the STM32F030), I'm assuming the ... |
H: Presence of Crossover Distortion in Class A Amplifier
This question is about theory facts of class A audio amplifier.
It is known that class A amplifier is usually biased so that an amplifier's quiescent point is in the middle of the amplifying device's load line. For class B amplifier is known that it is biased in... |
H: How is Gyro drift error related to error in velocity and position?
While reading about IMU on wikipedia I found this about its disadvantages:
"A constant error in attitude rate (gyro) results in a quadratic error in velocity and a cubic error growth in position."
How is Gyro drift error related to error in velocity... |
H: Intel FPGA: applying timing constraints
I have a data signal, select and clock signal which I am sending from the FPGA to another chip and I need to constrain them so I don't violate setup/hold time etc.
I have tried to write and SDC file, but looking at the signal on the oscilloscope it doesn't seem to work, both ... |
H: Would this protection and limiting circuitry work with 5.1V zener diode?
I have a small project for part of an experiment where a PWM controlled DC fan speed will be controlled by a -10/+10V function generator's analog DC output. So basically the chain will be:
Analog voltage------>PWM------->Buffer------>PWM TTL i... |
H: Am I applying the KCL the right way?
Applying KCL at the node where I have drawn the currents in order to find Vin/Vs,
I am not getting the correct answer which however I did obtain using the Voltage Divider. My question is, am I using the KCL wrong way?
Using KCL: Vin/Vs = (R/Rs)
Using Voltage divider (correct an... |
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