Datasets:
Alignment-Lab-AI
/
StackStore

Dataset card Data Studio Files
xet
 Community
1
text
stringlengths
83
79.5k
H: AC vs DC refrigerator I’m looking to purchase a refrigerator for my van. I plan to have an inverter installed and a battery bank. AC refrigerators are much cheaper than DC so I prefer to go that route if possible. The AC refrigerator has a power drawl of roughly 300KWA per year while the DC refrigerator drawls r...
H: DAC/ADC Precision & Noise: PD Resistor/Capacitor effect I'm developing a device that utilizes both ADC and DAC, and I have realized that my DAC output, which is fed into the op amp, is de-facto almost floating, since op amp has high input impedance. Both DAC and ADC are on the MCU now (STM32G071KBT6), although for ...
H: Op Amp with capacitive load - Peak Detector I have been looking into peak detector circuits for something I am designing and looking through Google, the common method seems to be this: Quite simple really. But, I have an engineer at my work who isn't a fan of this circuit because he says an op amp will struggle to...
H: Why is the saturation velocity for holes and electrons comparable? In a semiconductor like GaAs, the saturation velocity for both holes and electrons is on the order of \$10^7\$ cm/s. However, under lower electric fields E, the drift velocity of electrons is much larger than that of holes, since \$v_d = \mu E\$, wh...
H: Difference between the two Ethernet magnetic topologies Background Hello, I'm building up a PCB for a PoE module based on Microchip LAN8720 IC. The recommended schematic is shown in the following figure. I built up a prototype based on the Waveshare LAN8720 board. This Waveshare board uses an RJ-45 jack with magne...
H: Laplace Domain Representation for Phase Detector I am trying to model an LTI system and determine the overall transfer function of the system. The setup consists of a laser signal being fed through some filters, amplifiers, etc. represented by transfer function 1 (TF1) which is then mixed with a local oscillator by...
H: Where are document options in altium 2020 I switched to altium 2020 and I can't find the document options dialog that was previously available in "design / document options". I want to set parameters like in the screenshot (altium 2017). How should I do? AI: Open the document you want to see the options for. Open ...
H: DS18B20 - is current consumption of pullup resistor relevant for battery powered project In my project, I'll be using a DS18B20 digital temperature sensor, which requires a pullup resistor of around 4.7k between VCC and the signal. Please see the datasheet here for reference. Is there any current flowing over that ...
H: Not accurate readings when connecting OpAmp AD822 to ADC MCP3008 for my project, I am using a photodiode, that I connected to the AD822 OpAmp. This OpAmp should then be connected to the MCP3008 ADC. I am reading the data from the MCP3008 with a RaspberryPi. I am however getting weird readings from the ADC. I guess ...
H: Full-bridge output doesn`t work as expected I am making a half-bridge amplifier and successfully managed to amplify a sinusoidal wave (simulates a sound signal). When amplified it has almost 100V of amplitude. It has a inductor and a capacitor to create a low-pass filter. +Sine waveform plot: After that I duplica...
H: 14500 vs 18650 charge circuit General question: Is the charge circuit/protection circuit the same for a 14500 and 18650 cell? (I assume so because of the same nominal voltage, but wanted to make sure) My specific case: https://www.waveshare.com/wiki/Solar_Power_Manager <- This charge circuit is for 14500 cells, but...
H: Visualize the Arduino PWM's output by means an oscilloscope I'd like to visualize the PWM signal from an Arduino Uno board with an oscilloscope. I'd like to use this layout: Is this a safe connection? In other words, might I have problems because the oscilloscope and tha PC's PSU share the same earth ground? I nee...
H: Do I need to use a diode when combining two usb 5 volt lines? I want to use a USB bus powered device with my laptop. However, it draws to much current from the laptop and won't work. Do I need to use a diode(s) if I solder another 5 volt line powered by a wall wart to the original cable? AI: Yes, you can't connect ...
H: What does "Driven low/high" mean in terms of electronics? I keep seeing in specs/manuals to drive a pin high or low, what does that really mean? For example I'm working with a voltage regulator that has an ENABLE pin that says will switch the board to a low power state when "Driven Low". AI: You have to read (and s...
H: Designing a circuit that outputs variable voltage Total noob here, I'm looking to implement a circuit to control a fan that has these specifications: Pin 1 and 3 are DC- Pin 2 is DC+ Voltage should be from 6 to 16 V It needs to operate in 70-second cycles So let's say we're only giving it 6V. For 70 seconds we ne...
H: Artifacts in transient analysis Is there some rigorous treatment of convergence issues in transient analysis? I am using LTSpice. In transient analysis with maximum time-step is used. Fundamental oscillatory frequency of analysed circuit is under 100MHz. I undestand that implicit trapezoidal integration can produce...
H: What kind of diode should I use? What type of diode is best to use when I want to minimize the voltage drop in a 5V DC circuit with about 1500 milliamps in a THT form factor? AI: Based on the minimal information given I would probably pick a low Vf Schottky diode rated for at least 10V and 3A. But beware the leakag...
H: Help understanding wiring of capacitor I just wanted to double check my understanding of the diagram as in my mind the "visual clues" related to the way the cap is drawn seem to contradict the actual instructions of the diagram. If this capacitor only had 2 connectors on it would it be correct to wire the neutral ...
H: Polarity issue in JFET transistor I'm wondering what determines the polarity conditions in a JFET - is it that this transistor can only operate when the p-n junction is in reverse biased polarization? If so, what about the states of operation that the transistor can be in? There are three of them, and the polarizat...
H: op amp random pulsing to ground I have simple circuit with ada4891 op amp. I am using it to demodulate ASK modulated signal. But sometimes op amp is pulsing to ground for no reason. These pulses are short (about 1 us). I have oscilloscope up to 100 Mhz but I did not measured anything on input or in power supply rai...
H: Kirochoff's current law on Transmission line equation In the figure above, for equation 2.1b i.e applying Kirchhoff's current law, why is not the resistance and inductance taken into consideration? AI: In equation (2.1b) all the terms are current. There are 3 currents and there is no need to include resistance and...
H: LED strip heating troubles I bought a cheap LED strip and a 12V 5A power supply unit on Aliexpress. After testing it I realised that the LEDs closer to the PSU end get quite hot (around 55°C) while the ones at the other end of the strip don't get hot at all. I'm a bit worried that continuous exposure to this kind o...
H: How do I find the power absorbed from the current sources without voltage sources? Given this circuit, how do I determine the power absorbed from the dependent current sources? I figured out, through KCL, that \$R_{\text{a}} = 4/3 \Omega\$, \$R_{\text{b}} = 6 \Omega\$, \$R_{\text{c}} = 24/7 \Omega\$. What I'm most...
H: How do I find R without knowing anything about it? Given this circuit, how do I find \$R_1\$ and the gain of the gain G of the voltage-controlled current source if \$V_2 = 8\text{ V}\$ and the 20 V voltage source supplies 4 W of power? I tried using the current divider formula to find \$R_1\$ but ended have having...
H: Custom wave frequency for car radio My car radio doesn't support Bluetooth and I am wondering how to solve this problem so I can play songs from my phone. The first idea that came to my mind is obviously just to buy a new radio. However, I am wondering, just for the sake of having fun with electronics, if it was po...
H: LM317 - Why could I not get more than 200 mA from the output? My task is to heat a coil, with a resistance of approximately 0.8 ohm. I need to make a constant current source to make it work correctly. I want to use LM317T as a constant current source, but I could not get more than 0.2 A. Even when R1 is a 1 ohm res...
H: Do the ground marks in these two circuits have different meanings? The diodes in both circuits are ideal. I drew the circuit on the right to make a comparison. As the answers given for V and I in the circuit on the left are 1 V and 4 mA, this means D1 and D2 are not conducting while D1 is. I have not really seen a...
H: 7408 quad-AND with diode latching: sporadic (and undesired) self-latching at power up As an introduction to electronics, I am still working my way through Charles Platt's Make: Electronics (2nd edition). This issue is about Experiment 21: A Powerful Combination In circuit on figure 4-107, a 7408 (quad-AND) is used ...
H: TPS61046 wrong output voltage and high current consumption I am designing a circuit to control a multiplexed led matrix and for that I am testing two boost circuits. The TPS61046 and the TPS61080. My idea is that the input voltage is via USB or a Li+ coin cell (probably Li-ion@3.7V). The attached schematic shows th...
H: MOSFET R_ds(ON) I was reading through MOSFETS, and the most prominent parameter is drain source "on" resistance. I am unable to figure out what it is. suppose for a given gate source voltage V_GS we have applied a drain-source voltage which brings saturation to the MOSFET, at this point still the MOSFET approximate...
H: Why can the DLC (data length code) be 0 in CANBUS? In a lot of document I found out that the DLC can be from 0 to 8, but they don't say what purpose is of DLC being 0. AI: There are a couple of cases where this is of use. Keepalive. If there is no data that actually needs to be sent but an indication that a node is...
H: Can I replace one with the other? L7805CP, L7805CV Are those chip equal in a circuit? L7805CP, L7805CV Can I replace one with the other to try to fix a broken circuit board? AI: The difference is in packaging. The L7805CP on the left is an all plastic package. the L7805CV, on the right, has a metal tab. As lon...
H: I2C Master and Multiple slave configuration: How to cut off capacitance of unused I2C devices For my application, I plan to use around 5xI2C devices that are wired to one Master device over a cable length of around 1-2m for each (so 10m in total), I can use a low pullup resistor of around 1-2kOhm to battle the para...
H: Difference in noise levels between inverting and non-inverting inputs of LM386 An article on Hackaday claims that the inverting input of LM386 is less noisy than the non-inverting one: We’ve also noticed, and we’re not alone, that the inverting input seems to be less noisy than the non-inverting. See how the datas...
H: Does the STM32F103C8T6 blue pill chip require external resonators? I am designing a custom PCB with the bluepill MCU, which I want to program over ST link and SWD, which external resonators are a must? In the standard version, it comes with 32kHz and 8MHz: https://easyeda.com/r3bers/STM32F103C8T6-Test-Board EDIT: I...
H: Configuring the unused pin in CPU I have just started designing the embedded systems. While designing the CPU and thinking from the reliability point of view I actually had few curiosities For the unused pins which are tied up to Vcc using a pull up resistor - Lets say there is and fault and we have two conditions...
H: Operation of the current limiter circuit I have been trying to understand the current limiter circuit design. I am having problem decoding them. Could anybody help me understanding this circuit? Here I_VCC_AUX is 12 V and R247 comes from a monostable multivibrator circuit and the output goes to actuator. AI: Note t...
H: Confusion - ideal transformer on load When there is no load connected to the secondary, E is equal to U, and no current flows in an ideal transformer. Now if we connect a load on the secondary of a transformer, the primary will draw a current because E<U (temporarily), why when E gets equal to U the transformer wil...
H: Why do we need NMOS transistors for NAND gate? I have a hard time understanding how gates are built from CMOS transistors. For example, I don't understand why do we need the NMOS transistors if the PMOS transistors will already produce the desired outputs? if X or Y on both PMOS transistors is 0 , then both transis...
H: Best Practices for Using Brass Standoffs Electrically? I'm working on a project where I am trying to eliminate some cable assembly and connector costs. In my particular project I happen to have three brass standoffs that join together two boards. Board one is the mainboard, containing the power, mcu, and so on. The...
H: Small-signal output resistance of MOS common-source stage with source degeneration This is a bit of a long question so bear with me. In chapter 3 of Razavi's Design of Analog CMOS Integrated Circuits, he introduces the CS stage with source degeneration. He draws the small-signal model and says that the output resis...
H: Ethernet UTP cable test device, protection for PoE and signal voltages I’m thinking about designing a device/tool for UTP cable related testing/tracing using an MCU. I just would like to experiment with some ideas involving wire measurements, tone measurements etc. (so not using a PHY, just using my own signaling)....
H: How to draw sprites using DMA2D with transparency using stm32? I am using STM32F429I-Discovery board I want to draw sprites on TFT-LCD with transparency on top of background image , I used black color as the transparent color for the images that I want to draw and used DMA2D at blending mode but the black color is ...
H: Understanding why an OPA27 is unsuitable for a window comparator and a MC1458DR is better I'm a junior electronics engineer and have a question about a window comparator circuit I've built: Circuit Explanation: The op amps have a tight reference voltage on their non-inverting terminals. U1A pin 3 is set to 5.025V ...
H: Difference between surface current and current density? Actually my problem is with the direction of both. I use CST to simulate a patch antenna. I guess that current density is the classic vector field \$ \mathbf{J} \$ (A/m^2) and actually follows the direction of the E-field. In my case, the patch antenna is plac...
H: Using a ferrite core transformer as an inductor for a boost converter I am trying to make a boost converter. I'm stepping up 5V to 12V. I have all the required components, including a power MOSFET(IRLZ44N), a Schottky diode (SR260) and an astable multivibrator that produces a 71.4kHz square wave for my MOSFET. I ju...
H: Instrument amplifier REF pin current I'm using AD7190 to sample 4ch differential voltage, but the AD7190 only has four input pins. To fix that, I use AD8422 to convert four differential signals to four single-ended signals. The schematic I'm using for one channel is down below. My question is, (1) I have four chann...
H: How to match RF output of 30 Ω + j10 Ω to microstrip IFA antenna with matching network? I am designing a 4 layer PCB with an inverted F antenna (similar to image below, ground plane is larger than shown), and need to match the antenna to the source RF pin impedance of 30 + j10 ohms (source IC is an ESP32-D0WDQ6, da...
H: Maximum voltage divider resistances for sensing LiPo battery voltage over 10bit ADC: is MOhm range working? I've designed a PCB that should contain as few components as possible but it should have a simple way for measuring the battery voltage using an ADC channel and a simple voltage divider. My current design wit...
H: How can I find the slope at Vout/Vin at Vin = 0, from the datasheet about Op-amp? I'm trying OpenModelica and I'm going to simulate an Op-amp. (No it's not Windows 95, it's IceWM + Ubuntu 20.04) But I wonder where I can find the slope Vout/Vin when Vin = 0 in the datahseet? I have heard that the slope from an Op-a...
H: Frequency domain S11 conversion to time domain TDR Below we see the S11 plot of a transmission line, the Wikipedia definition of the reflection coefficient as a function of S-params. As I see it, the S-param frequency domain plot comes from the time domain steady state. TDR is time domain in every moment from the s...
H: How can I do two points scaling in electronics? 0.6 V - 3.2 V to 0.0 V - 3.3 V I'm seeking a solution how to do a two point scaling in electronics. I have tried an Op-amp, but it did not work very well. So I wonder if you have some ideas how to do two point scaling from e.g 0.6 V - 3.2 V to 0.0 V - 3.3 V? When I ap...
H: Question about diode connected transistor (BJT) with current source I'm trying to find ΔV for this circuit, but I'm having a bit of trouble doing so. I think the current on the right BJT will be n times greater than the left, but I'm not sure about that either. It looks like a current mirroring circuit to generat...
H: what is the alternative method for time domain reflectometry I have read that TDR is problematic because if we have many transmission lines in series which cause discontinuity to the source resistance ,then the closer TL's will mask the reading of the far TL from the source, so is when the rise time of the source i...
H: Calculating chip junction temperature based on case temperature As far as I know one can calculate a chip’s (Diode, Transistor..) junction temperature rise with the consumed power and the thermal resistance Rth. Is there a way to calculate the junction temperature without the power but based on the temperature mea...
H: Combinational logic circuit I was asked to: Design a combinational logic circuit that has 10 inputs, numbered 0 through to 9, and one output. The output is required to go HIGH whenever any one, or more, of the inputs numbered 2, 5, 6 or 7 go HIGH. The circuit should be free of static hazards. I know I can use OR ...
H: Car battery charger I'm a student of electrical high school. I have tried this project, to make a car battery charger with an Arduino-powered voltage meter. My problem is that I made some research about making an Arduino voltage meter and I found that I need to connect the v- of my charger to GND on Arduino. I'm no...
H: phase between the input voltage and the output voltage? If I have this circuit, how can I calculate the phase between the input voltage and the output voltage (capacitor voltage)? Knowing that the signal frequency is 1kHz AI: Well, the transfer function of this circuit is given by: $$\underline{\mathscr{H}}\left(\t...
H: What is the difference in RISCV between JAL and JALR? I'm kinda confused on what the difference is between the two instructions and would love a comparison of the two! AI: JAL saves the next address (program counter +4) to the destination register, adds the immediate value encoded in the instruction to the program ...
H: What are the diode and two capacitors doing in this circuit? I have an existing circuit from a working design that I am trying to understand in order to apply the understanding to a different circuit I'm building. We can reduce the scenario to basically two ICs and a handful of discrete components. The first IC i...
H: What is the source of distortion in this simple common-em. Colpitts oscillator waveform? I took the standard common emitter NPN (3904) amplifier with an LC tank on the base: (Credit to "Radio Physics and Electronics" on youtube.) I experimented with R1/R2 thinking it was a gain issue, but it is still there with lo...
H: Output Resistance of Small-Signal MOSFET Circuit I have some doubts concerning the calculation of the small-signal output resistance of a common-source stage with source-degeneration. This is related to another question I posted but I have refined my question in detail here as to exactly what is troubling me The Pr...
H: Magical uses of tunnel diodes I am studying the working principle of tunnel diode and I am reading for a voltage range it creates a negative differential resistance. If we have a current source supplying the circuit with some current, if the current is inside the negative differential resistance region, which will ...
H: Transforming bike dynamo output to reduce diode bridge loss ratio I'd like to use a standard 6v/3w bike bottle dynamo to power a 18650 battery charging module TP4056 which also powers some LED's. Diode bridge rectifier steals 1.4v from the generator. In addition to reduced output voltage, a large portion of period ...
H: Which datasheet CTR value to use in optocoupler circuit? I am looking to use the FODM8801C in my circuit: https://www.onsemi.com/pdf/datasheet/fodm8801a-d.pdf simulate this circuit – Schematic created using CircuitLab "Vout" node goes into an IC with the following requirements: Vlow < 0.4V Vhigh > 2.1V Max leakag...
H: Inductor Polarity Reversal - Flyback Voltage I have a question about how to intuitively think about the polarity reversal (flyback voltage) that occurs in an inductor when removed from a supply. Here is my understanding: When the switch is closed, current flows through the inductor to ground, with a positive voltag...
H: Does this require a larger series resistor? I am connecting a switch to an input pin on a Nexys A7-100T FPGA development board, like shown in the below image: The circuit has a 10K pull down resistor (R1 on drawing above) to ground and the FPGA has an internal 200 ohm resistor in series with the input pin (See bel...
H: One of the two brown wires to my shower isolator switch is not live. What has caused this please? My electric shower stopped working. The shower power button didn’t turn on the shower. I then checked the isolator switch on the ceiling. Its red light didn’t turn on when the switch was on. I checked the cabling to th...
H: Is it possible to change the ground voltage level for the ADC/DAC at a STM32F373? I want to change the ADC and the DAC ground so the ADC begins to measure at e.g 0.64V and the DAC begins to send out voltage at 0.64V. Is it possible to change VSSA and VSSSD One issue I found is that VSSA can only be 0V. But 0V just...
H: Differential Opamp: How to cut or reduce current consumption from supply rails I built a simple differential amplifier using an LM358: Please find the datasheet here I want to reduce the current consumption so my idea was: Use a GPIO pin of my MCU to switch Vdd supply to the opamp Use large resistors Try to also ...
H: Colpitts Oscillator not working I am desining a colpitts oscillator to oscillate at around 16Khz. I tried to simulate the circuit in LT spice. The tank circuit looks right to me but I can't get the circuit to oscillate.Also, the circuit satisfies the berkhausen criterion with $$gain*attenuation = 3.1 (approx)$$.I ...
H: What is EMC recommended circuit and is it necessary? I'm building a power supply with five isolation dc-dc converters, here is their data sheet https://www.cui.com/product/resource/pdqe15-d.pdf The data sheet mentions a EMC recommended circuit, below a simpler version of the circuit, see below. Is the EMC circuit n...
H: What mathematical function do I2C falling edges follow, and why? Consider any standard I2C communication : the falling edges, either on SDA or on SCL, will take a certain amount of time to complete. What mathematical function do these falling edges follow? Why do they follow this function, from an electronic point...
H: Direction of N-channel mosfet when replacing the diode in the buck convertor In a buck-converter with a diode, in the first and second phases (on and of states) current is supposed to flow like the following circuits: I am looking for a way to replace the diode with a MOSFET and after a few search I came by the fo...
H: Manually calculated -3dB cut off frequency differs from the simulated value I have been trying to do experiments with a differential BJT pair. As the output resistance for the common emitter configuration is R_c (1k), instead of finding the capacitance, I attached a 1pF capacitor. I wanted to find the cut-off frequ...
H: Grounding an immersion heater I want to ground a bucket/immersion heater: should I build a conductive cage around the underwater resistance and connect it to ground? would it work to just place the ground wire inside the water, maybe close to the heater? AI: Figure 1. Random immersion heater image from Amazon. Any...
H: How to even start solving multi-diode problems? For example, in the circuit below there are 5 diodes constant-voltage-drop diodes, I could have 2^5 circuits to solve. Is there something I'm not paying attention to, that would greatly simplify this problem? PS: The S1 switch is closed. Problem is asking for Vx. Tha...
H: Diodes on SPI bus data lines and pull-up resistors Take a look at this schematic provided by Adafruit with a MAX31855 to read a thermocouple. They use diodes on CLK and CS pins while also pulling them up on VCC. I would like to ask why the use those diodes? Maybe as an ESD protection? And on another note: Let's sa...
H: Why are V and I out of phase for a resistor in parallel with an inductor for the resistor? Vth is the voltage across RL so the current through the load should be in phase with Vth. But the current through the load is 1.8A with phase angle of 100.43 degrees and the voltage across it is 72.76V with phase angle of 134...
H: ESP32-Cam GPIO remote control and video feed Is it possible to control the ESP32-Cam GPIO from the web? Just like a "normal" ESP32 can create a website with buttons that turn on and off certain GPIOs Was wondering because I can't find anything on the internet it only shows the normal ESP32 Note: I have ESP32M compa...
H: How does mouse keep working when the battery is drained? When battery is drained with time it provides less voltage. Which makes me wonder - how does appliance (like a mouse) keeps working with lower voltage? Is it because electrical components inside can work with different levels of voltage? Or there are compone...
H: How to change the final value of several NetLabel at the same time - Altium Designer 21 I need to change the final value of the string in several NetLabel in Altium Designer 21. For example, I need to change RED0_U1 to RED0_U4, RED1_U1 to RED1_U4 and so on. I would like to know if there is a simple way where you ca...
H: Multiple driver error for SystemVerilog initial value In my code I have an always_comb block coded as follows: always_comb begin if ( x == 0 ) z = some_value ; else if ( y == 1 ) z = some_different_value ; end some_value and some_different_value. z is defined and given an initial value ( f...
H: Differential and common mode over-range indicator for In-amp I need some advice with differential and common-mode over-range indication. I have a device with In-amp and I would like to add a Led or buzzer for differential and common-mode over-range indication. I have easy access to all nodes as this In-amp is not...
H: flyback RCD design the equation is used to calculate the power of RCD, I know this power is from leakage inductor the inductor energy can use 1/2Li^2 to express, but I don't know how to get this document equation. Can someone give me some help? AI: Look at the formula: - It's energy multiplied by frequency and tha...
H: DC-DC boost converters in parallel to run DC motor Our aim was to power the motors of our bot (which were selected according to the torque requirement of our bot) using a single AAA Battery but due to limited time and and the difficulties in international shipment we are stuck with boosters only available in our co...
H: Always-on socket in-between a 2-way switch? I have access to a power cable that powers devices through a 2-way switch, basically: Is it possible to add an always-on socket in between using L1, L2 and N? The problem is that either L1 or L2 is live at a given time and, obviously, they cannot be connected together as...
H: Diodes circuit confusion If we have this circuit: The diode with the lowest forward voltage drop will conduct and turn on while the other will turn off and not conduct current. If I have this circuit: Assuming the 2 diodes have the same voltage drop, R1 can be considered to be in parallel to R2 and that's how we ...
H: Box header to individually crimped wires I've got an amplifier board that has a 2x10 keyed box header with a pitch of 2.54mm (black connector in photo below). It's designed to take the IDC type connector. I want to connect a few channels of my balanced audio source to this box header. I think the design of the amp...
H: How do digital potentiometer data sheets define maxmimum power disipation? I am new to digital potsentiometers, but I would like to use one in a design. I have been looking at several digital potetiometer datasheets and I kind of expected to see some kind of maximum power dissipation value that needed to be respect...
H: Crystal radio receiver Why is a parallel LC circuit used to filter out the right frequency from the antenna? Shouldn't it be in series? We have a maximum impedance at resonant frequency if we connect in parallel, so why isn't the signal being blocked? AI: The selected signal is being blocked - from going to ground,...
H: Regarding boost converter and current sink IC operation I have a doubt regarding the use of a boost converter and a current sink. This doubt arises based on the following -very simplified- circuit. Following the attached circuit, the boost will take the incoming 3.7V and provide a constant 12V output at whatever d...
H: Verilog odd behavior with multiple edge detect So I'm a newbie to Verilog. I decided to purchase a nice board (a Terasic DE0-CV) and teach myself some Verilog. And I'm seeing some strange behavior that I can't explain. I lifted some code out of an example that drives the 7-seg LEDs. And I have them tied to a reg...
H: Is there any way to have a diode that have very small resistance from reverse path? I'm trying to find a way so I will always have close to 0V at the measurement point (above the diode), when I have 0V as input. The -3.3V is a fixed voltage source. At 0.64V at input, I have -5.7mV at the measurement point. That's O...
H: CH341A Voltages for an AT45DB041B First off - I'm fairly new to electronics I've been probing an AT45DB041B on a mobile printer board using my CH341A The voltages on the printer board for the AT45DB041B pins are 3v I just discovered that the CH341A is outputting 5v (Supposedly there's a fix for this) Is there a cha...
H: Current limiting at 100 amps What options exist for limiting current in this scenario? I have been searching for an option and it looks like I need to reduce the field on the alternator but I don't understand enough to know if that will work on its own with a DC/DC charger. At the moment the option seems to be to b...
H: Op-Amp Input Common Voltage Range for specific gain This is the circuit I am working on. I am using this instrumental amplifier AD623 with a gain of 100 using a 1k resistor between pin 1 and 8. (https://www.analog.com/media/en/technical-documentation/data-sheets/AD623.pdf) Based on this, my input voltage can swing...
H: Does an increase in frequency affect a capacitors value? When looking at an open circuited microstrip line, when the frequency is increased the value of the capacitance is changed. When looking at an ideal capacitor the value does not change with increased frequency. If it wasn't an ideal capacitor would the value ...
H: How this equation of the voltage is attained? I've may been asking the very easy question. The each resistor has the same resistance(given by \$r\$). The textbooks states the following. \$V_{AB}=r\{i_1+i_2+i_3+(I-i_1)\}\$ How the above equation is attained? Can anyone tell me some hint(s)? so that I can deduce it ...
H: How to prove that the \$3\$ nodes have the same potentials? The question of symmetry. The each resistor has the same resistance(given by \$r\$). Why a current doesn't flows between the each endpoints of the middle \$2\$ resistors? The text book only states of it with "symmetry of middle vertical line". Proving tha...