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H: Phase between two sinusoids and which one is leading
that's my first question here.
I'm studying fundamentals of electric ciruits
and I faced this question:
Determine which one leads and by how much:
$$v1(t) = 4*\cos(377t + 10)$$
$$v2(t) = -20*\cos (377t)$$
So I converted
$$v2 = -20*\cos (377t)$$ to
$$v2 = +20*\c... |
H: Obtain audio information from mic and play in MATLAB
I am trying to make a basic VoIP implementation and I am stuck obtaining sound samples from the mic and playing the read data on a computer. I tried to sample the voice from the microphone and send it to the serial terminal using a very minimal code:
void setup()... |
H: Altium Designer New Template
I have just prepared a new template for Altium Designer schematics. I included an image to template. My question is that if i prepare a project with this template, how can i embed this image when i need to send another person? Because after i sent a project with my new template, i reali... |
H: What reduced the noise when multiplying neighbor samples?
Is this a common filtering technique? I multiplied each sample with it's neighbor.
I was trying to distinguish the spikes from the noise. Low-pass filtering wasn't as helpful maybe because both the spikes and the noise are kind of high frequency.
TOP: filter... |
H: What is the proportion of the strength signals between wired and wireless mouse/keyboard?
I understand that the PSU of a desktop PC is creating noise (ripples and ringing) at frequencies that propagate along the cable of the mouse and the keyboard, and radiate those signals through them. The frequencies may be beyo... |
H: A confusion on flash memory map of an AVR micro-controller
I'm trying to figure out the flash memory map of ATmega328P:
Below is from the datasheet:
Program Memory Map for ATmega328P is given as 32KB: 32Kbytes = 32K * bytes
0x0000 means 16 bit wide (for each line of memory there is 2 bytes)
which is 16K * 16bit
W... |
H: DIY zero-crossing circuit, how crucial are component values?
I want to build this circuit, taken from here, and I'm wondering exactly how crucial exact component values are.
I don't have any 220k, 22k, or 4.7k resistors. I'm wondering if I can substitute two 100k in series for the 220k, two 10k for the 22k and a 5... |
H: Determine which wire goes to which connection?
I am repairing a pair of headphones that had one earpiece come out (poor workmanship sadly...). They have two wires and two connections to solder them to, but I don't see an easy way to tell which goes to which.
Is there a way I can do so easily without trying one and... |
H: Finding the operating point of a transistor circuit
I want to find the operating point of this circuit:
where we have an NPN transistor and \$R_V = 47\text{ k}\Omega\$, \$R_C = 1\text{ k}\Omega\$, \$R_E = 4,7\text{ k}\Omega\$, \$\beta = 100 \$,
\$+U_B = 10\text{ V}\$ and \$-U_B = -10\text{ V}\$.
My problem is, tha... |
H: Is there anything wrong with this heat sink design?
If not, is it any better that the conventional fin-based heatsink? It attaches at the bottom, and looks exactly the same in the back. It is supposed to be a passive cooling type heat-sink, therefore there is no fan attached.
AI: It appears to be a bad rendering of... |
H: Design Asynchronous State Machine using T flip-flop
There is this question that i don't really get the solution:
Design a pulse-mode circuit having two input lines x1 and x2, and one output line z. The circuit should produce an output pulse coincide with the last input pulse in the sequence x1-x2-x2. No other input... |
H: Are there chips encoded with fixed 8bit values?
I am assembling a few data acquisition fixtures and would like my software to be able to identify the fixtures programatically. I have a breadboard that I can use for basic circuits. The DUT signals come into the fixture, can interact with the circuits on the breadboa... |
H: why ultrasonic module sends out 8 cycles ? and , why the trigger pulse is 10us?
this is the operation of the ultarsonic module HC-sr04 :
The timing diagram of HC-SR04 is shown. To start measurement, Trig of
SR04 must receive a pulse of high (5V) for at least 10us, this will
initiate the sensor will transmit ou... |
H: Why I need those capacitors in USB 3.0 transmission lines?
In this picture (originally posted in this thread), there are capacitors called "AC Capacitor". Why do I need those capacitors? It is a USB 3.0 SuperSpeed connection, so it would not be an AC-Powered device.
AI: While it's powered by DC, the signals are hi... |
H: Using an earth bonding plug for grounding server rack enclosure
I have a 18U server rack enclosure in my 4th storey home and want to connect the metal frame to electrical earth. The rails are already bonded to the frame with 2 wires by the manufacturer.
My wall sockets are 3 pin plugs with earth, live and neutral w... |
H: Which transistor should I use in my circuit?
I've made a rudimentary flood alarm (a circuit that rings a buzzer when the water in a reservoir is full) using a 9V battery and a cheap Chinese buzzer that came without a current rating. All I know is that it operates between 6V-12V. There's no power rating on it either... |
H: What is the difference between RS-232 and TTL UART?
I always need to communicate with the TTL UART port on the MCU with a computer. When I talked about that, people always refer the UART port as an RS-232 port. Are they correct? If not, what is the difference between them?
Also, can I use a RS-232-to-USB converter ... |
H: Sending a pulse from alternating constant output
I have an overlapping XOR gate which alternated from 0 to 1 whenever one of the inputs is turned on. Basically, it's off when there are even high input and on when there are odd high input. The problem with this is I'm only able to send a pulse when the said overlapp... |
H: What kind USB Cable connector of connector is this?
Which connector is this? It has a USB-A Male on one side, but what is the other connector on the right?
AI: It's a variant of 1S connectors typically used for Lipo battery chargers |
H: Analog Dimmer Circuit Analysis
I am trying to analyse the basic circuit of a dimmer. I don't have much experience in AC circuits, so I am not sure how do I need to proceed. My circuit is the next:
I have something like this:
I have found some interesting relationships. Like the output vrms based on the firing angl... |
H: Why change microcontroller's PWM frequency?
What are exactly the pros/cons of changing the PWM frequency?
I don't think I need to change any PWM frequency at this very moment - but since I don't know the benefits of doing it, how can I really know if it's useful for me?
I'd like a general answer (which I and other ... |
H: Two step up converters to build dual supply with a virtual ground
I would like to amplify a difference signal from two electret microphones.
I would like to use an instrumentation amplifier with dual supply (AD620 for testing, probably INA103 for the final product).
Using dual power supply close to the maximum rat... |
H: Differential amplifier with differential output and common-mode shift
Summary: I would like to build a differential amplifier with differential output, but shift the common mode to a different level from the original.
My current knowledge takes me this far: Take the traditional 3-opamp instrumentation amplifier, li... |
H: bypassing vs. decoupling capacitors
I often see those two terms explicitly used as synonyms, but sometimes from the context I would say they're not.
So, is a bypass capacitor exactly the same as a decoupling capacitor?
AI: Yes, decoupling capacitor and bypass capacitor are the same thing.
These refer to a capacito... |
H: Charge 3.7 Li-ion Battery with 5V battery charger?
Is it possible/save to charge a 3.7V Li-ion Battery with a 5V battery charger like this one: https://www.amazon.de/gp/product/B0191EVW0C/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Additional question: Would this be sufficient for an Arduino Pro Mini 5V using the V... |
H: Consequences of inrush current out of specifications in AC/DC power supply
What would be the consequence of an inrush current bigger than acceptable limits at the output of a AC/DC power supply? We are currently using a MeanWell model (GST160A15) whose datasheet reports a maximum inrush current of 120A. We are usin... |
H: output voltage of an operational amplifier
A student designs an electronic sensor to monitor whether the temperature in a refrigerator
is above or below a particular value. The circuit is shown below.
Question: An operational amplifier (op-amp) is used as the processing unit. Describe the function
of this processi... |
H: Compliance test mode in Gen1/2 and Gen3
I'm looking the mindshare book for TX compliance test.
Somehow I'm confused about the method to enter the Polling.Compliance substate.
In Gen1/2, it seems that of the transmitter detects a 50 Ohm load, it'll enter the compliance substate.
However, in Gen3, I can't find such c... |
H: Confusion over current divider rule
I asked a question here about calculating the resistance an unknown resistor using superposition.
As part of the answer I was given $$I_1=I_3\frac{R_2+R_i}{R_1+R_2+R_i}$$ and $$I_2=I_3\frac{R_1}{R_1+R_2+R_i}$$ as the third case of the superposition method involving a current sou... |
H: Power Control in CDMA
It is commonly known that power control in CDMA is needed since all users/base stations transmit on the same frequency, and power control would help to limit the interference received at the base station.
My question is more fundamental - Why is it a problem that the various incoming signals (... |
H: How to store 8 bit character in 32 bit Data Flash memory?
Is it possible to store 8 bit character to 32 bit Internal Data Flash in the Microcontroller by just using only 8 bit of space for each bytes?,by using a combination of 4 bytes which can be also recovered as individual bytes later.
I'm using Nuc240 (ARM-M0) ... |
H: 2D parity code error detection/correction?
If we assume the following: the received bits were encoded using a 2-D even-parity code, what is min #of error is there.
I am a little bit confused , it is clear that the third column has an error and ( second , fourth and sixth ) rows have errors.
For example, If we chan... |
H: in host to device communication protocol, what does high and low mean?
I'm trying to learn about the PS/2 protocol from here. At about 4:00 he talks about low and high values.
This part is to let the host send data to the device but the clock should come from the device.
My question is what is zero, what is one an... |
H: cable size vs current rating
I would like to know if using two 2.5mm² cables has a greater current rating than one 6mm² cable. The ratio of CSA is 2.4x and so I would have expected to need three 2.5mm² cables. However, I then looked at the actual current ratings tables for different cable sizes and see that 2.5mm²... |
H: Four state switching
I'm building a light indicator system with four states (All lights off, Red light on, Amber light on, and Green light on). I want to be able to go from one state to the next with just one button press, which rules out having individual on/off switches for each light, and also a rotary switch be... |
H: capacitor voltage ripple in buck converter
I am struggling with output voltage ripple calculation of the buck converter below. Firstly, I don't understand the following statement from the lecture. Can anyone explain it?
If the capacitor voltage ripple is small, then essentially all of the
ac component of indu... |
H: Boost converter design help - NJM2360D
So, I purchased a NJM2360D boost converter from Mouser. Using two 6V batteries in series to create a 12V supply, I'm trying to obtain a 40V output.
The "typical application" circuit from the datasheet is shown below:
Can you guys offer any insight into the design of such a ci... |
H: NPN Transistor choice
A few months ago, I realised a meter reading system following this french guide: http://www.magdiblog.fr/gpio/teleinfo-edf-suivi-conso-de-votre-compteur-electrique/
I use the following circuit:
(source: magdiblog.fr)
Which is connected to my Raspberry Pi B+, it works really well but now i'm t... |
H: Quarter-wave length antenna shape
I built a simple RF communication system with a 433MHz transmitter and a receiver. The transmitter needs to transmit in a 180º range (I mean in one half of a sphere, I don't know how to say that in English), the receiver must be omni-directional.
I was told that a good antenna for ... |
H: Prerequisites for Power Integrity Analysis
I try to learn about the topic of Power Integrity Analysis of an PCB, i.e. analysing the Power Distribution network (PDN) of a PCB to locate the regions of biggest noise or DC voltage droop.
Independent of the concrete CAD package used, where and how can I learn about the ... |
H: Convert a [0,5]V wave to [-2,2]V wave
Using a PIC, I got a signal oscillating around 2.5V +-[0,2.5]V approximately. This is intended to generate a simple sound through a small speaker.
The speaker, unfortunately works with 0V +-[0,2]V, and I expect the direct usage of 0-5V not resulting in the same sound (or even b... |
H: Why would you short two pins of a potentiometer?
I've found a potentiometer which controls the heat of a cook top. One of the outer pins and the centre pin were shorted with a soldered jumper.
Why would someone do that? What does this achieve?
AI: Tying the wiper and one end pole together effectively turns the pote... |
H: Wien Bridge Oscillator - LT Super Low Distortion Variable Sine Wave Oscillator Debug
I have been setting up a low distortion sine wave generator based on this design from LT (http://www.linear.com/solutions/1623):
For resistors R1 and R2 I am using a ganged pot so that both change together, however, I have found t... |
H: What happens to current if I change dielectric from air to material with Ɛr>1
Electrostatics: One of the job interview question:
Plate capacitor, with area of electrodes S, and distance between them d,has air as dielectric. Capacitor is connected to constant voltage source. Then, it is disconnected and dielectric i... |
H: Teardrops in Eagle
Is there an good and easy way to add teardrops to traces in Eagle? See the red trace in the following image.
I have a board with a lot of vias and drawing the teardrops manually (as I have done in the image above) is not an option.
AI: Eagle comes with an ULP called teardrops.upl, which does wha... |
H: 1PPS signal from GPS: do the electrical connections need special treatment?
I have an arduino (interrupt pin) listen to the 1PPS signal from this GPS (from the Adafruit ultimate GPS breakout).
However, sometimes it doesn't pick up the signal. Occasionally, I've been able to make it pick up a signal by fidgeting wit... |
H: AND gate IC with internal pullup
I'm currently using a dual-input AND gate similar to the Texas Instruments SN74LVC2G08.
I'm wondering if any manufacturers make an AND gate with internal pull-ups so the inputs would default to TRUE when the device driving them tri-states. If so, can anyone point me to an example? ... |
H: using headphones as microphone
I am learning about headphones and microphones and I have 2 questions.
I bought a few pairs of headphones from the dollar store and took one pair apart. There is a weak little magnet in the center with very thin insulated wire coiled around it and there is a very delicate plastic shee... |
H: Verilog preventing latches
I created a simple Verilog module that displays random numbers. This module has a counter that counts up at every clock edge and at the press of a button, whatever the number is in the counter at that time is displayed. Here is my code:
module counter (input wire in, input wire clock, inp... |
H: What is the minimum distance that BLE 4.0 capable device be programmed for..?
After Searching on Web found out that the range/Distance of BLE device transmission can be controlled by varying its transmission power and frequency. But could not get how specific can we bet on the minimum distance covered by reducing t... |
H: What are the limitations of macro in embedded programming?
What could be the limitations of macros in embedded system programming.
In contrast to c programming.
AI: As it is worded, the question you quote makes no sense. Macro facilities are a part of C, C++, assembler, and probably a lot of other languages. If I w... |
H: STM32L011 RTC wakeup function
I have a battery-constrained device with STM32L011. Right now I am using Nucleo-32 development board. In the end I want to use suspend mode with RTC to wake up every couple of minutes. First I want the RTC to generate an interrupt using the wakeup function.
I can see in my UART log, th... |
H: Anti-Aliasing filter design
I appreciate that different applications have different criteria, but could someone give a ball park figure of how much attenuation is needed for an anti aliasing filter at the Nyquist frequency to prevent aliasing?
For example I'm building a filter for the input of my PIC which samples ... |
H: Double BiQuad sector antenna
I want to DIY a double BiQuad antenna . But I find they are different from different web. As the picture first of below, the board under the antenna is flat, but the second has two orthogonal bend. I just want high dBi and use for 5.8G wireless image transmission. Which is better ?
AI:... |
H: (How) does blocking a (servo/DC) motor break it?
I don't know why, where or how I picked this up, but I believe that if you power an electric motor while blocking it, and thus stopping it from moving, you'll damage it. I'm thinking of the following type of motor, and possibly servo motors:
Is it indeed true that h... |
H: Create multiple clocks on FPGA or create clock dividers
I am thinking in a design and I have a doubt about clocking. What is better? Do I create different clocks or create clock enables and only use one? What is the best option in terms of resources? What is more reusable?
Thanks!
AI: There are different reasons wh... |
H: Suppressing sparks when attaching buck converter to battery
i have bought a cheap DC/DC converter (24v to 19v, 15A, link). When i attach a 24v battery pack to the converter input i get sparks. Is there any way to suppress these sparks when i attach the converter?
Edit: I want to power a Intel NUC mini computer wit... |
H: Silicon purity and electronic feature density
During development of an integrated circuit it is my understanding that you require a silicon purity of 99.99999999%.
Has this always been the case? In 1971, had the first commercially available microprocessor (Intel 4004, 10 micron process) reached this level of purity... |
H: Used Fluke 87V multimeter working correctly?
I'm just a hobbyist but I like to purchase quality tools so I purchased an "only used once" Fluke 87V on eBay. The calibration sticker says the calibration expired last year.
Anyways, when I turn on the multimeter the milliamp reading shows a few mA even when I'm not to... |
H: Modern alternative to TRIAC for switching alternating current?
The only alternative I know is a high power MOSFET wrapped with diode bridge.
AI: An SSR (solid state relay) doesn't need a bridge: -
It handles AC and DC very nicely without using a bridge rectifier. |
H: Arduino HF Interference Protection
I'm working on creating a relatively simple project where I'm using an Arduino as a remote garage door opener. Part of this project has a reed switch near the bottom of the door to detect when its closed.
My issue is this requires a pretty long wire run for the switch (probably ab... |
H: Common Collector Biasing
The common terminal of the transistor configuration is also the GND of the circuit, right? I get it that emitter is GND but how is it possible for NPN transistor that base or collector is GND?
AI: The expressions "common (terminal)" are confusing. It refers to the terminal that doesn't car... |
H: What do thermocouple type names (eg K, L, B) signify?
What does the K in a type K thermocouple mean and likewise for the rest?
Is it elemental (I don't see any potassium in there though) or something else?
Thanks.
AI: The letters are arbitrary "nicknames" for various common types. For example:
E = chromel–constan... |
H: Current Sensing with Non-Inverting Amplifier
Hello, I'm implementing a current sensing circuit as shown in the schematic. The simulation works but the physical circuit does not. On the breadboard if I measure between the shunt and the load to the ground on the power supply I get 67.3mV, however if I measure across... |
H: How to turn on LED with only a cathode pin
I'm looking at the datasheet for some TIL311 hexadecimal displays which I ordered (but have not yet arrived. (Actually they appear to be TIL311 clones, but should be compatible.))
According to the datasheet, the left and right decimal point LEDs have their cathodes expose... |
H: CMOS Logic Design
How to represent such an equation using CMOS inverter (The whole equation is inverted)
Z=~[(A.B)+C.(A+B)]
The load equation will be :
[(A'+B').C'+(A'.B')]
' means it is inverted
The driver equation will be :
[(A.B)+C.(A+B)]
The problem is how am i going to use transistor A and B in parallel(OR) a... |
H: How does the voltage division on this work?
How does the voltage division of this work? I understanding other types using KVL, but this I am just lost. Im not comfortable blindly taking the answer and would like to know. Or is the answer just flat out wrong?
AI: So in this particular circuit, we can see that the o... |
H: Signal processing to demodulate LF RFID
I'm trying to read a LF (low frequency) RFID transponder. The carrier frequency is 125kHz and the base band signal has a 20kHz bandwidth. The modulation is in load modulation, a kind of AM modulation.
I'm using the following approach to process the signal:
Downconversion by... |
H: Thermal Runaway in batteries
The place where I work has a fairly large UPS comprising of rows of sealed lead acid batteries (Haze HZS-7.5HR). The batteries are now 6 years old and are not holding charge very well.
The service technician report states, among other things that ".. the batteries may go into thermal ... |
H: how many 7400 can the 74LS04 safely drive
how many 7400 can the 74LS04 safely drive ?
74LS04 Specs :
I output low : 8 mA
7400 Specs :
I input low : -1.6 mA
PS : I know that the answer either 5 or 2. The only thing I am not sure is that do you consider each input for 7400 separately or not. So each 00 would need... |
H: Internal input overvoltage protection
On schematic below LDO U4 is disabled and U2 is not powered.
Can the high output from U1 feed U2 inadvertently through the ESD protection diodes on U2's input?
simulate this circuit – Schematic created using CircuitLab
Assume that U2's input protection is implemented this (rat... |
H: RMS switch current in boost converter
I'm struck in calculating the I(switch,rms) in boost converter. Average current through diode = average o/p current , also average current through the inductor = average current through the source. From this I drew the following waveform. So,
EDIT
This was the part of the fol... |
H: Is this transformer-less power supply a good idea?
This is based on a design I found somewhere , I just wanted to know whether this is a good idea ,I intend to use this to power a microcontroller and a 70 ohm 5 V relay . The cap c1 limits the current to about 200 mA , well below the 500 mA rating of my zener diod... |
H: Opamps used in low voltage applications
How is it possible to use op amps on a supply of (+3v), for example: mp3 player and other battery operated devices?
What type of op amps do we use in low voltage applications?
How is it possible they have such a big output voltage in relation to the supply voltage?
This is ... |
H: DC motor noise filtering
I have some brushed motors near to a 433 MHz RF receiver. They're controlled by a 490 Hz PWM signal. The electrical noise they produce is not a problem for the circuit, but it is for the receiver.
How can I reduce the noise, at least on the frequencies interfering with the transmitter?
I re... |
H: Saving component library preferences in KiCAD
I have a local component library that I use in most designs. I've been adding this to the library list in Eschema for each new design because I can't figure out how to add this permanently via preferences or something. Is creating a template the right/only way to make t... |
H: Does a simple bug detector detect electric field or magnetic field?
Hi.
This is a very cheap and simple bug detector that is supposed to make sound
when it detect RF signals between 100Mhz-2600Mhz.
I found out that it doesn't do what it supposed to do,since its
sensitivity is very poor.It detects signals of some m... |
H: Why do (microphone) preamp designs tend to limit opamp gain to max 60 dB?
Looking at many pro recording quality microphone preamps, I noticed that every design I looked at that uses an opamp (discrete or IC) limits the gain provided by the opamp to about max 60dB. While most preamps use another stage (transformer(s... |
H: small brushed motors thrust
I built a quadcopter. It had a very low total thrust/weight ratio, and after I added some components it doesn't fly any more, so I want to change its motors and propellers in order to increase thrust.
The total weight is around 90g; of this, 26g are the motors (20mm brushed motors).
Is i... |
H: NOT gate with transistor
(source: electronics-tutorials.ws)
When A is powered, why does the current go to the ground and not to Q?
AI: For the purposes of the NOT gate, you are looking at voltage and not looking at the current. The next "logic unit" that follows will be designed to consider the voltage at OUT, not... |
H: Mixer line in max voltage
I have built a tube amplifier and modded it with a line out for headphones based on this article.
I measured the output voltage on the artificial "line out" is peaking around 4-5V.
As a reference I also tested what my mp3 player delivers and that is around 500 mV
is it safe to introduce 5... |
H: Low-cost way of shining a wide line of light, kind of like some bar code scanners do
What is a cost-effective way (say roughly $15) to shine a wide but thin beam of light, directly away from the source, so that it would project a line onto a nearby surface?
My particular beam would need to be about 4' wide and may... |
H: What is the meaning / significance of this Capacitor Symbol?
In the SanKen data sheet for an Off-Line PWM Controller (found here) they use, in several places, a schematic symbol for an electrolytic capacitor that I haven't seen before (see C6 in the image below).
The image was taken from Chapter 12. Reference Desi... |
H: Should I use li-ion CR1220 cell or a different chemical type?
I have bought an RTC module that needs a CR1220 coin cell, but is supplied without one. Should I use a Li-ion cell or a different chemical type, and what advantages or differences are there between them? I cannot find any guidance at all so far on-line.
... |
H: Purpose of capacitors and extra resistors in the feedback of the inverting op amp?
I'm trying to fully understand this opamp configuration but i can't. The signal enters through R19 and i understand that is an inverting configuration and is attenuating the signal with a gain of G=1.2/7.5, but i cannot truly underst... |
H: Read Fuel Tank level voltage and send via Wifi
In most cars the fuel level is measured by a floater connected to a potentiometer and it's quite likely that the panel is reading an analogue voltage signal coming from the fuel sender unit.
What would be the cheapest way to read that voltage, then send it via WiFi to... |
H: Cost Effective Laser Detection
I am a novice / hobbyist and I have a project in mind that involves detecting where a laser is aimed at on a relatively large scale (300+ sensors). I've found circuits that would work on a small scale such as a phototransistor or a comparator IC to compare resistances, but I have abso... |
H: ID Resistor value
Working on a Ferguson 14M2 CRT TV (220V/50Hz). Dead.
Have identified at least one suspect in the hot zone. R88.
Have tried for hours to find a diagram online, but to no avail.
I believe it to be a 1.8 Ω resistor, but would appreciate a trained eye to have a look before I order. (Not a single shop ... |
H: Increased current draw in data transmission circuit
Ok so here's my question. I'm fairly new to electronics research, my background is chemical engineering, but I'm attempting to improve my understanding of basic circuits and data transmission for my work. For this issue; I have a problem, and a solution, and I'm t... |
H: Clarification on using software serial with AVR's
Arduino appears to be able to use software serial on any pins you choose. I am trying to test the same scenario on an atMega128 however, all of the examples and notes I find require using the RX pin on External Interrupt 0 which is PIND0. I have successfully impleme... |
H: Altium Panelizing
I want to send my board to production however i am not sure a component's actual sizes because there is not enough information on its datasheet. I put its image and the necessary dimension "x".
This is the datasheet information;
This is the necessary size for me, shown by "x".
I could not find "... |
H: What effect does using a termination resistor that is larger than the characteristic impedance of the transmission line?
I have seen that when terminating an RS422 point-to-point connection, you should terminate the signals with a parallel resistor that matches the characteristic impedance of the transmission line.... |
H: Switch quickly between sets of layers in eagle
Is there a way in eagle to quickly switch between sets of layers? e.g. all top layers, all bottom layers, both top and bottom.
Currently, when I want to see only the top layers, I have to click / unselect, Bottom, bPlace, bOrigins, bNames, bValues, bCream, bDocu.
AI: A... |
H: delta-wye with dependent sources
I was looking through some problems in Nilsson's book and this one caught my attention:
The variable of the dependente source is in the \$4\Omega\$ resistor, which is part of a "delta" type of resistor's network. If I perform the delta-wye transformation: (1) the resistance values ... |
H: BLDC motor control hall effect invalid
I am a student EE major working on a control algorithm for a 3 phase sensored BLDC motor. Currently the motor is running well. I'm currently pursuing fault condition safety software for the motor. One possible fault that could occur is an invalid state read in for the hall eff... |
H: How to get -5 to 5V with AD5668
I'm more programmer than electrical engineer. I have connected Arduino with an AD5668 DAC. I want to control analog synth such as Korg MS-20M. For the filter, it takes -5 to 5V.
Right now I can generate only 0-5V with digital values 0-65535.
I want to generate -5V to 5V straight out ... |
H: Is there any difference between the terminals of the rheostat
This is probably a dumb question but I just wanted to be sure for my practical exams.
Is there any difference between the upper or the lower terminal of the rheostat? Are you supposed to connect the positive terminal of the battery to any specific termin... |
H: AC and DC voltage wire areas
is their a difference between the surface area of the weir that i use for 1A AC voltage source and 1A DC voltage source ?
AI: Skin effect and proximity effects are caused by AC magnetic fields affecting the usable part of a conductor for passing current. As frequency rises skin effect w... |
H: Understanding voltage and current of a phototransistor w/ collector resistor
I want to study the circuit of an Infrared proximity sensor, so I assembled a circuit with an infrared LED (940nm) and a phototransistor.
When no current passes from the LED, obviously the phototransistor is switched Off, thus the whole ... |
H: How is the minimum reasonable distance for the far field of a dipole antenna calculated?
First let me try to explain what I think the near field is about:
At very close ranges, due to the differences between instantanous voltage and current on each small segment of an antenna at any given time, the EM field is not ... |
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