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H: Ambiguity in the Definition of Resonance Frequency
we know that in a series LC circuit the resonance frequency is defined as that frequency in which the total impedance offered by the circuit is zero.
We also know that in a parallel LC circuit the resonance frequency is defined as that frequency in which the total ... |
H: Is this Non-Inverting integrator correct?
I've seen time again the formula for an inverting integrator. I was wondering if I could swap the configurations on the inverting and non inverting inputs of the op amp to make the circuit a non-inverting integrator. I did the math, but when I searched online to make sure m... |
H: SA636 Local Oscillator -- Which Pin?
This is about a very specific RF system on a chip -- NXP's SA636, "Low voltage, high-performance mixer FM/IF system...". Datasheet is here: https://www.nxp.com/docs/en/data-sheet/SA636.pdf. The datasheets and application notes differ in what looks like a critical way to me, and ... |
H: Need help in designing a BJT Amplifier with Avnl = 100
For our final project, we need to design a "single-stage BJT-based highpass amplifier using voltage divider configuration".
The amplifier has the following requirements:
\$V_{CC} = 12V, f_L = 300 Hz, Vs = 300 m V_{pk-pk}, and A_{VNL} = 100 to 300 \$.
I decided ... |
H: Overlay plots from PSpice - SIMetrix or SIMetrix to PSpice
I wanted to verify the accuracy of a identical model which I modelled, between PSpice and SIMetrix simulator
I ran model in Pspice and SIMetrix separately and probed required nets (net names are identical in both the simulators)
Saved the file of SIMetri... |
H: Using 2 postive regulators with 2 prong power supplies for bipolor power supply
My nephew and I have been working on a circuit that uses +/- 4.5V. Up until now we have been using 2 3-AAA battery holders to supply each leg and now wish to move to mains power.
My question is, discounting the more unusual topographie... |
H: What is IDC connector pitch on a USBAsp?
I am planning to use a USBASP programmer to program one of my boards, and I want to use a fitting receptacle on my board. I fail to find the exact pitch that the USBAsp's IDC connector has (as I understand there are 2mm and 2.54mm pitches). Does anyone have any info?
AI: I f... |
H: Calculating resistance for integrated circuit with logical gates, so that the circuit works properly
I have found this task with its solution:
For the circuit shown below calculate \$R\$ so that the circuit works
properly. All gates belong to the \$TTL\$ series.
Solution:
$$\begin{align*}R_{max} &= \frac{V_{CC} -... |
H: VHDL: Port mapping to physical pins when you have "subcomponents" inside a component
Let's say you have a project in VHDL that looks something like this:
Generally it's pretty easy to map the ports together between Component 1 and Component 2. However, what if Component 1 is code from another VHDL project that yo... |
H: What is the range of feedback resistors of LM2577 adjustable version?
I am making custom boost converter with LM2577 adjustable version.
I have a question about selecting feedback resistors R1 and R2
For R1 and R2 formulas available in the datasheet, but they do not specify the range kilo or mega or just ohms.
Whi... |
H: Does an ISP clock interfere with the on-board clock when programming via ISP?
I am planning to use ISP programmer to program my new AVR board. I use an 8 MHz crystal on my PCB to clock the micro (atmega328p-au). Now, as I understand the ISP programmer will provide its own clock to my board when programming. It occu... |
H: Question about a circuit problem with opamp
I would like to solve the following circuit, but I can't understand why i1=0, whereas i2=v2/R1.
If i2 is not equal to 0, where does the current go after the first resistor?
AI: Call the node connected to the negative terminal of the voltage source ground.
The left side o... |
H: What is the proper configuration for an adjustable voltage divider circuit
I am making a circuit that need a voltage reference that is adjustable. The the answer that many of us would think of is a voltage divider.
There are 2 configurations that I thought this can be done, and it is only now that I have wondered ... |
H: Operation of this circuit
I have this circuit. I did the truth table but I wasn't able to understand what operations this circuit do on pair of 2-bit binary inputs (A1, A0) and (B1, B0).
I thought it was mod or div but it's not
AI: Is n't that a simple 2-bit multiplier ?:
No idea how can I format like this. So doi... |
H: How does this strobe light circuit work?
I took apart the top of my strobe light and couldn’t exactly understand parts of the circuit. Could someone explain how it works?
When the strobe is plugged in, it immediately starts flashing and doesn’t stop until unplugged. The three wires are attached to a knob on the out... |
H: Vector Analyzer: what is IF bandwidth?
I noticed that if I set IF bandwidth low, the measures done with a vector analyzer are better (with higher SNR) but it is slower.
Precisely, what does it happen when I change it? Can you explain me simply what it represents?
AI: Many receivers, such as your vector analyzer, us... |
H: Selecting transformer voltage for lamp drawing 32W and 6.6A
I have a lamp with the following known specs:
32W
6.6A
AC
Applying p = V x I, I expect the required input voltage to be 4.8V AC.
However, this seems to be an unusual input voltage for a lamp. For context: this is a MR-16 style quartz (possibly halogen) ... |
H: Voltage divider reverse formula
I have this schematic, with an power supply of 24V and I want to read this voltage with my arduino so i need a voltage divider, the formula for voltage divider is Vout = (Vin * R2)/R1+R2, so with my data, Vout is 2.824V (24 * 10000)/75000+10000.
So what is the reverse formula to conv... |
H: How to calculate the value of the thermistor based on the output voltage of this circuit
I recently bought a board that consists of this circuitry. It came without an instruction whatsoever, so I have to figure out how to measure the temperature based on the output voltage at the To.
The circuit consists of a Whea... |
H: USB 2.0 High-Power Circuit
Is there are special circuit that says to USB socket how much current the device needs?
Our device needs at up to 200mA or little bit more.
I have been searching but I do not find a clear answer anywhere. Should there be resistors on data lines or something else?
Unit load for USB 2.0 is... |
H: Are there multiple bits on a data cable at the same time?
Let's say there is a copper under sea cable from New York to Lisbon with a length of 5350km.
Then a signal needs approx. t = 5350km/c ≈ 19ms to arrive.
Now let's imagine sending a file from New York to Lisbon.
I assume that you don't have to wait until one b... |
H: How to make gain margin 6dB
So I have a non-inverting opamp configuration R1=20k and the system starts to oscillate if R2 is less than 20k. I need to make the gain margin equal to 6dB by choosing the right value for R2.
AI: Here is a circuit with gain of +0.1 ( -20dB gain, but INPHASE) and the opamp has rolloff wel... |
H: stm32f429 hardware development
I have built a custom stm32f429 board. It uses SPI, I2C, UART and CAN for communication with various sensors. This is my first stm32f429 board, i've designed boards around stm32f3 and f1 series before. I'm using SWD interface via the stlink-v2 debugger/programmer. The STLink utility r... |
H: Basic Dependent Source Circuit Problem
https://ibb.co/JmBt71D
Here, i added a image of the circuit problem.
I wonder how to solve it.
Firstly, i found a equation with respect to KVL for the left side of the circuit: -36+24*I+12*I=0 and I=1A so, VΔ=12V
Secondly, the current of VCCS is causing trouble because it de... |
H: CAN Bus multidirectional
I am currently looking for a uC for a project of mine which needs a CAN interface. This would be my first project using CAN. Since I want to send and receive messages between the master and at least 8 slaves I was wondering about the amount of CAN ports I need.
According to this post I can ... |
H: How to solve a two BJT circuit?
Please could someone help me understand how to solve this circuit?
AI: IF that is your hand-writing, may I complement you on artistic expression and sense of scale.
Unfortunately , I can barely print my own name after recent surgery from a random event called hand Ischemia with TOS b... |
H: What is the difference between transresistance and differential resistance?
Transresistance is defined as the change in output voltage over change in input current. While differential resistance is defined in the same manner. So what is the difference ?
AI: Transresistance, as given by the definition, refers to an ... |
H: GPS relative positioning
I have a set of 4 rovers crawling on the ground, each of them equipped with a standard GPS positioning system. The rovers start together from a known position. Each rover is locating itself via GPS.
I command the rovers to move 1 meter straight, with a control loop on the GPS positioning. G... |
H: (Micro) USB Timed Relay
I am currently trying to build a low power server with a Raspberry Pi I don't use any more (3B) but I am struggling to find a way to cut down it's power usage in it's off hours. Since the Pi uses ~100mA even when completely shut down, I am looking for a way to terminate the power going to it... |
H: Trouble understanding thevenin's model from AoE Lab
I am using the AoE lab book to teach myself electronics. I am on the voltage divider section, and I am confused at their simplified explanation. I'd like to explain it a different way, but I am not sure how to understand the open circuit voltage.
For the following... |
H: USB to UART Bridge IC question
I have a few basic questions regarding this USB to UART bridge IC
My questions are just from the hardware perspective. I have little to no software knowledge. So please bear with me and help me understand your answer in simple terms.
This IC converts USB protocol to UART protocol at ... |
H: I2C data sampling is done at clock edge or level
I am trying to understand I2C data bus from this document. It explains the START-SLAVEADRESS-R/W-ACK-DATA.. as the master-slave take turns to get hold of the shared bus for mutual communication.
One thing that I could not understand is related to the sampling of the ... |
H: Relating input torque on BLDC motor shaft with output current
I am trying to build a drone generator with a gasoline engine and a 14-pole,170KV, 2KW BLDC skateboard motor (this one). Before designing the system and running it, I wanted to clear out a fundamental doubt that has been troubling me. Details are as foll... |
H: Removing delay in UART communication layer
I'm writing to a UART Device. So I'm doing the following:
I'm transmitting the message as follows:
HAL_UART_Transmit_IT(&huart5, data, size);
uint8_t d;
HAL_UART_Receive_IT(&huart5, &d, 1);
push_single(&_readBuffer, d); // push to ring buffer
Then I'm reev... |
H: Is there a limit for the max charger supply current for this power bank?
To charge this power bank 5V supply is needed through micro USB. It says FOR the power bank the charge current: ≤ 2200 mA.
What does that indicate for the power supply max current which charges this power bank? Does that mean one should use a... |
H: Input and Output Impedances of Single to Differential mode converter
I have this circuit that converts a single ended input signal to differential output signal. I want to understand how to calculate or find out its input and output impedances?
The two op-amps are in inverting and non-inverting configuration. Will ... |
H: 3-way solenoid valve gets hot
I have this Bosch 3-way valve that I use in a hydronic system.
If I run 12V to energize the valve, it gets very HOT!
Is that normal with such valves?
AI: If this is definitely an on/off valve, which is designed to be either fully operated or fully released - see note below - then you... |
H: I want to put a radio transceiver in the seatpost of my bike. Will it work?
I am a noob regarding electronics. I want to create a device for my bicycle using a GPS with an eByte E32 (a 1W LoRa SX1268 433MHz radio transceiver) and some batteries. The device will be in the seat post.
Will the RF transmitter work or i... |
H: TinyFPGA A Series Board programmer compatibility
Since the TinyFPGA programmer writes configurations to the Flash memory of the FPGA chip, can I use that programmer for A series boards on any LCMXO2 chip? Or can I at least use it for the same chip with a different package?
AI: From what I read, theoretically, yes. ... |
H: How to enter bootloader on a Embedded Linux System with no keyboard?
I am trying to reflash a microcontroller.
An instruction in the manual states that:
Power up the owa4x and press the space bar to enter the bootloader prompt
Insert the uSD card with the images to flash
Confirm a FAT32 formatted SD card is acces... |
H: LTspice not getting exactly -3dB point
Looking to answer another question on this site, to did some math and fired up LTspice to check some values and I am not able to the -3dB point.
I found the transfer function to be
$$ H(s) = \cfrac{1 + \cfrac{s}{\cfrac{1}{R_2C_1}}}{1+ \cfrac{s}{\frac{1}{(R_1+ R_2)C_1}}} $$
T... |
H: Optocouplers driving MOSFETs in an inverter
For many hours I was trying to simulate in LTspice XVII an optocoupler driver for MOSFETs in an inverter. My project is to build a SMPS with linear voltage stabilizer (I didnt put it on the schematic yet) that is conotrolled by AVR microcontroller. I've managed earlier to... |
H: Diode ROM with decoder and multiplexers
I have this question on my exam I couldn't answer:
A diode ROM has been built using a decoder and multiplexers. If A4A3A2A1A0 = 01001, what is D3D2D1D0?
Here is the first schematic:
The answer is supposed to be:
Can anyone explain the solution?
AI: I've seen people do this... |
H: Is the TC ("terminal count") output of a 4-bit sync counter (74163) reasonably assumed to be glitch-free?
My gut tells me so, but the proof eludes me. Effectively this output is the AND of all four bits. These four bits go from 0 to 1 at very distinct times, assuming the counter is running at a reasonable clock r... |
H: Can I replace a dual section capacitor in a tube amplifier design with two single capacitors?
I was planning on building this schematic, but found it hard to source their 20/20 dual section cap (C3/C4). Could I replace this with two single 20uF caps, or is it a dual-section for a reason?
AI: I added the C3/4 desig... |
H: How to get an analog signal 0 to 12 V DC based on reference 0 to 5 V DC?
I have an Arduino which is creating an analog voltage from 0 to 5 V (I used external DAC for it) and I need to use it for the regulation of "big" circuit with 12 V DC. So I am trying to get on the "big" circuit analog values from 0 to 12 V DC ... |
H: CD4006 Behavioral model in LTSpice
I want to simulate the behavioral model of CD4006 chip in LTspice. It is a CMOS 18-Stage Static Register. Looking at the Datasheet I see the one stage logic diagram that consist of inverting buffers and flops. But this stage has D, Q, !Q, CL and !CL i/os. CL - is for clock. D - i... |
H: How to interface HCSR04 ultrasonic sensor with ATxmega256A3?
I have to interface HCSR04 with ATXMega256. I am using the TCC0 Timer in Capture mode with setting it to capture pulse width, using Event System Channel 0 source: Port A Pin0.
Anyway, my code is shown below in one file using USARTE1 to send the measuremen... |
H: Is there any reason as to why the schematic symbol of comparators is almost equivalent to that of op amps?
They do similar tasks, but they are almost completely different because comparators output digital signals. In that case, I am confused as to why their schematic symbol is almost entirely the same. Is it imply... |
H: Single-package DC/DC converters for PoE -- good idea?
I'm planning a design where we'll use PoE to power a data acquisition board (essentially, an ADC + microcontroller + ethernet PHY and interface).
I look at DC/DC isolated converters to get the 5V or 3.3V from the, say 48V from the PoE wires, and I get a headache... |
H: How to end sending data over I2C by Slave or Master?
Let us say a Slave or Master is sending multiple bytes to the receiver on I2C bus and the number of bytes is not defined before hand. So then how will the sender tell the receiver that it has no more data to send?
So far what I understand is that for the case wh... |
H: Chip selection: Serial interfaces
I am narrowing the selection of an uC for my project and currently reading the datasheets. One contender is Microchips 'ATSAMC21*' series. Using the parametric selection tool I get following information
In the datasheet it says on p. 2
Up to eight Serial Communication Interfaces (... |
H: Need help finding pin layout diagram for GSM module (SIM800c RPi development board)
I'm having a bit of a conundrum. I bought a SIM800c development board off of ebay but the pins are not labeled at all and I have no idea which pins Rx and Tx are. I really want to hook it up to my COM port and test it out with putty... |
H: Are all USB controllers kept at host side?
I see a lot of USB controllers in battery charging circuits. They have USB host controllers, embedded controller and USB port controller at host side. (Refer tps2547 )
Can somebody tell me what are the minimum control and protection circuits needed for charging using U... |
H: I2C Communication Open drain benefits vs Push pull
I am reading this TI I2C App Note for understanding the I2C operation and need to understand how Multi master I2C will operate.
I was not able to understand this para in the app note, "Since no device may force a high on a line, this means that the bus will never
r... |
H: RLC circuit (simulation in Scilab)
I tried to solve a RLC circuit and I obtained the matrix. I tried to do a circuit in Scilab, but I didn't obtain a sinusoidal response. The output is in the capacitor and the input is the step function. Why didn't I get the sinusoidal response?
AI: The circuit is overdamped. The o... |
H: C - wrapping globals in a struct?
A firmware style question concerning C.
I have some legacy code I am tidying up. One of the nasty features is global variables being scattered through the source files. I can make a few of them locals, which is fine. However, how to deal with the rest. I favour creating a struct an... |
H: are flex PCB's really used?
Are there any application where flex pcb's (rigid/flex) are really being used and required? or is this a more luxury product which is not entirely mature yet to the level where it can be implemented in every day products.
AI: As the comments suggest, the main use of flexible PCB techniqu... |
H: Burning graphite with 9V battery vs. Arduino's 5V
First off, I'd like to say that I am completely new to electronics and the way circuits work, so this may be a really dumb question.
I've tried searching Google but I can't really find what I'm looking for since I'm new to all this.
Basically, I'm trying to get a pe... |
H: Can an induction motor be used to generate power?
Induction motors do not have magnets in them, instead the magnetic field the outer coils generate creates electricity, and subsequently magnetic field, in the inner coil. This means those motors need no brushes as the inner coil is not connected to anything.
I was w... |
H: Water and electricity?
I just put my Ipad Air 3 in my bag, it was raining and forgot to close it such that when I got home, my Ipad and the inside of my bag was extremely wet. I know a bit of physics but not figure whether or not something could happen to the inner workings of my Ipad (so I am reaching out to the ... |
H: Understanding datasheet for SMPS transformer
Looking at different datasheets of SMPS transformer, I found that the manufacturer always specifies voltage in a certain frequency range. Why is this parameter important?
For example this transformer:
https://www.weonline.de/katalog/datasheet/750311564.pdf
voltage is on... |
H: SMPS voltage feedback using op-amps
I'm designing an adjustable high-voltage low-current power supply using UC3843 control chip.
Basic parameters: Uin = 24 V DC, Uout = 30-1000 V DC, Iout = 10 mA, Uripple < 1 V, fsw = 40 kHz
I have a few questions about one aspect of my desing - the voltage feedback. I most simple ... |
H: Is it possible to provide DAC voltage to VOUT_ADJ to control Vout?
I am using a TPS61391 booster.
I need to adjust Vout via a DAC connected to FB pin voltage divider (VOUT_ADJ).
is this possible?
DAC voltage varies from 0 to 3.3V.
AI: Yes, this is certainly possible.
FB stands for "feedback", and the feedback volt... |
H: Copper oxide on cables after tinning w/ no clean flux
We just found a problem with some (translucent) speaker wire.
We have been tinning wires for a year by dipping the stripped end in no clean flux and then dipping again in lead free solder. We have a new customer that gave us translucent wires to tin and solder,... |
H: Degrees of freedom concept in sensors
I was examining the specs of a breakout board.
It says in there that,
Integrate 10 dof sensors
Adxl345 accelerometer
ITG3200 gyro
HMC5883L Compass
BMP280 pressure sensor
Why is it called as a 10 DOF sensor? In past I was dealing with some IMUs consisting of an accelerometer +... |
H: Can a memory chip have a certain starting address
In my book there is a question stated:
Can a memory chip of capacity 512 KB have the starting address
2B0000h?
To me this seems like an incomplete question with a wrong answer in the book. The answer states:
No, because the first 16 bits of the starting address... |
H: Decoupling on Power-on-reset-IC
Is it a good idea to place the usual 100nF decoupling capacitor on a power-on-reset chip? Mightn't that influence its behavior on brown-out or power dips?
What is the best approach here?
The power-on-reset IC is a Micrel MIC803. I could not find any info on this on SE or in the datas... |
H: Why is BER higher for binary modulation compared to quaternary?
I came across this image in my notes and I fail to understand why BER seems to decrease as the modulation order increases and I was hoping for an answer
AI: Put simply, for the same average energy per bit, the modulation scheme with more bits per symbo... |
H: SMD Electronics Part that could be used for hanging
I'm working on a decorative PCB and I want the ability to hang it up on a wall conveniently. I was trying to think of something that would work similar to the saw tooth looking piece in this example
One requirement is that is has to be a surface mounted part. Som... |
H: I2C bus arbitration - communication layer
I want to understand about the communication layer on which I2C Bus arbitration is done.
My question is based on this question which was previously asked here.
The accepted answer states that
Bus arbitration is not part of several of the protocols you mention.
RS422, RS4... |
H: Why is a LIN cluster limited to 16 nodes?
It says everywhere that a LIN network can be made up of at most 16 nodes (1 master node and up to 15 slave nodes). The id field however is 6 bits long allowing for more than 15 slaves to be addressed. Why this limitation to a total of 16 nodes? What was to happen if i were ... |
H: On-Board Charger Battery Load
I am designing an On board charger for electric vehicles for my graduation project. And I am confused about testing the OBC. My goal is charging a 400V battery pack, but I don't have a battery pack and probably I won't.
Is it enough to use resistors instead of batteries? If not what c... |
H: Why does VHDL not allow to alias slice of an array in this way?
This code does not compile:
type array_1_t is array (0 to 73) of std_logic_vector(31 downto 0);
type array_2_t is array (0 to 22) of std_logic_vector(31 downto 0);
signal my_array_1: array_1_t;
alias my_array_2_1: array_2_t is my_array_1(0 to... |
H: Li-Ion Protection IC Always in Overcurrent Detect Mode
I am seeing an issue with AP9211SA-AF-HAC7 Battery management system.
The battery protection circuit, designed as per the schematic attached (the same as the reference design in the data sheet(https://www.diodes.com/assets/Datasheets/AP9211.pdf)), continuously ... |
H: GPIO Button setup with switching power supply
I have a small board with 8 GPIO's, I previously had 4 buttons connected thus used 4 as inputs and 4 as outputs. I use a 10k pull-down resistor for each button. I don't have a resister pre input to protect against programming mishaps (nothing like living on the edge).
I... |
H: User controlled storage devices existence
Today's memory devices have a lot of logic embedded before data is actually written onto the NAND pages.
An example could be wear levelling algorithm , FTL functionalities etc.
The typical life of a NAND cell would be around 100000 cycles of operation.
My question is:
Can t... |
H: Shorting of VCC & GND for short duration of time
I have used ULN2003A for my custom board. While checking "continuity" between VCC and GND there is a continuity for a short duration of time(less than a second), it comes at a random time.
I have powered ON a fully assembled board and tested. Everything is working as... |
H: Voltage divider resistor PN balancing
Refer the representational schematics for voltage sensing by ADC (SAR). I read somewhere to balance the P and N lines add R3 = R1||R2. How come R1 and R2 parallel combination could be considered as contributing error voltage at P so that N has to be R3=R1||R2. Could somebody sh... |
H: Addition Amplifier equation doesn't seem to work
In this addition amplifier, when I set V1=5V, V2=5V, R1=3.3kOhm R2=10kOhm, the answer (theoretically) should be -20.15V, but the actual result is -13.04V. Why is this happening? Is the equation for the addition amplifier wrong? Or is something wrong with the amplifi... |
H: How to desolder an element from a PCB?
I want to desolder an element from a PCB, I can see all the solder joints that are holding it on to the board and I can reach all of them easily.
I am not very experienced in working with a soldering iron, tbh this is the first time I am working with one but I informed myself... |
H: Does changing the diameter of a wire affect the TCR of a wire?
I have a wire wound resistor that is changing too much when being heated and cooled. I know changing the chemical composition of the wire is the biggest factor in changing the temperature coefficient of resistance (TCR) of the wire, but I already have w... |
H: Are there any low temperature (60 - 100 degree celsius) soldering pastes?
I'm looking for low temperature soldering paste that doesn't come in a wheel of filament. It seems tin and bismuth soldering pastes have a melting point of around 160 degrees Celsius.
Are there any formulations, or products on the market, f... |
H: What does the T stand for in AXI4-Stream's TDATA, TVALID, TREADY, etc.?
In the AXI4-Stream protocol, the names of the signal that make up a stream are prefixed with T: TDATA, TVALID, TREADY, TLAST, etc.
Does the T prefix have a meaning? "Transfer" comes to mind, but that term is also used in the (non-stream) AXI4 p... |
H: Differential Pair Length Matching
I am routing a 16 bit ADC chip, the LTC2217 (datasheet) to FPGA. Each bit is an LVDS pair and I know +/- of the pair should be the same length but what about from pair to pair? I have 2 of these chips, 18 pairs, if you include OF and CLK, 36 pairs of LvDS having to be meandered to ... |
H: Which adapter/handling to choose on (Type N) rf test devices when SMA/K cables have to be connected frequently?
I'm no expert in high frequency. But probably it is no good idea to change the adapters sitting on type N female output on and on as a torque wrench is used to fix them.
But I have to make measurements w... |
H: Reading ADC value with uV Reference voltage
I'm trying to improve the accuracy of the ADC by amplifying the signal by 1/256 (i.e. 1/2^8) to make 2 8-bit ADC into 16-bit ADC. My question is can the ADC give good results if the ADC values are from +25uV to -25uV by putting the reference voltage at 50uV.
I'm using ATx... |
H: Determine angular position from two potentiometers
I am trying to generate a continuous angle based on the output of the two potentiometers that are inside my device. The pots are shifted by 180 degrees and are capable of spinning continuously. How can I use the signals from both pots to determine direction while a... |
H: How to implement 32-bit adder logic using two 16-bit adders?
I've been trying to implement a 32-bit adder by instantiating two 16-bit adders. The code is compiling but failing some test cases. I don't know what is going wrong in this.
verilog code
module top_module(
input [0:31] a,
input [0:31] b,
outpu... |
H: What is the purpose /name of this CMOS gate configuration?
I have tried search via google images, but it's not good at recognizing line drawings
AI: Drawn as logic instead of transistors, it looks like this:
simulate this circuit – Schematic created using CircuitLab
The bottom branch is A & !B & C, the top branch ... |
H: Struggling to understand zero cross detecting circuit
I'm considering using this zero-cross detector circuit in a design but I'm struggling to understand exactly how Q1 is activated. The description says "Q1 turns on and feeds current from C1 to the opto via R4, whenever the mains voltage (divided by (R1+R2)/R3) i... |
H: How to extend detection distance of computer mouse?
I recently learned that modern computer mice take tiny pictures many times a second and compares them to understand in what direction it is heading. And that the little light at the bottom is to create shadows for uniform colored, textured surfaces to get a decent... |
H: Stability - Driving a Capacitive Load
I know I have been asked not to provide video links and ask questions.
But I have no proper guide/mentor or anyone who can provide me better answers other than users in this site. So, please pardon me for this. I rely on this site for answers which can Solve my queries and help... |
H: Two switches and two LEDs using 8051
I am trying to work around a circuit and my requirement is as follows: -
There are two inputs and two outputs. Each input controls an individual led. I am writing a code for this requirement using a Nuvoton MS51 based controller (Which itself is 8051 based controller). The soft... |
H: Switching frequency and controller's crossover frequency in DC-DC converters
In the context of control loop stability of DC-DC Converters,
A switch mode power supply is essentially a sampled-data system, therefore the theoretical maximum bandwidth is one half the switching frequency. Practically the phase and tran... |
H: Noise on probe while measuring Switching Frequency of Buck Converter
I have a buck converter and I am measuring the voltage ripple at the output capacitor along with that I am measuring the switching frequency at the cathode of the diode. Please refer the below image. I am using 500MHz keysight scope.
Probe 1: Out... |
H: Help identifying connector on vinyl shellhead
I'm working on a DIY project where I'm basically creating/connecting my own vinyl record player arm.
I have one of these shellheads in the picture below. Ideally I wan't to be able to use this, and also use the connector show, without soldering cables directly onto it.... |
H: Replacing a 1.5V with a 5V power source
I've got a motor that's driven by a 1.5V battery. The shaft turns slowly and that's the way I'd like after replacing with a USB cable (5V) source.
In the current circuit there's no resisters (just a diode) - so using ohms law - not sure what the current draw is. It's V/0 righ... |
H: Minimum voltage drop to run a circuit
Disclaimer : this question may be more 'physics' than electric engineering
So suppose you have a circuit with a battery and some other elements, the elements, the battery continuously provides energy to the circuit lets say 'E' by the kirchoff voltage law all this energy should... |
H: ADC / data acquisition board - general layout question
For one of my current projects, I am designing a small data acquisition board.
However, I am currently not sure about the overall layout of the board.
Here are 2 possible variants I came up with. First of all, the position of the connectors is necessary for the... |
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