Questions tagged [conversion]
The conversion tag has no usage guidance.
178
questions
3
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2answers
202 views
Does using “16's complement” for hex always yield the same result as two's comp for binary?
I'm sure it's obvious as day, but i'm having a hard time convincing myself with all these carries and conversions...
Given that i'm operating on the same number (say, ...
3
votes
1answer
96 views
ADC issue - possible non-monotonicity?
My ADC (two of them under test - the Analog Devices AD7676, and the Maxim MAX11108) is a 3 Ms/S SAR. The device is powered and referenced by a precision 3.3V reference device (100mA max).
The ...
0
votes
1answer
75 views
DIY attaching an EU power plug to an US charger?
I've received some Chinese walkie talkies today, which annoyingly enough had the charging adapters to the charging stations come with US plugs instead of EU plugs.
The adapters are marked with
...
0
votes
0answers
47 views
Decimal to Excess-3
To convert the given decimal number to XS3, I have to add 3 to each individual number and convert that number into BCD. If the given decimal number is 12 then adding 3 to each gives me 45 and the ...
0
votes
3answers
90 views
Compare white LED radiated optical power: lumens vs milliwatts
I'm trying to compare the brightness of various white LEDs, some of which are listed in lumens and others in milliWatts (this is milliwatts of optical output, not watts of electrical power consumption)...
0
votes
2answers
61 views
Reducing 16.5VDC battery output to the range of 13.8VDC +- 15% without introducing noise for 15 Amp load
The title pretty much says it all. The (up to) 15A load is a ham radio, which is the reason for the 'no noise' constraint. Maybe a tiny bit of noise is OK? I don't know how I could tell.
To save you ...
0
votes
0answers
54 views
TTL 10µs wide generation on CMOS rising edge?
I want to use a DG645 from Stanford research to trigg two different laser. To do this, I need four 10µs negative TTL signal. The DG645 send +5V CMOS signal (picture below).
Since I have a little ...
1
vote
1answer
64 views
Conversion error in STM32 MIPI-DSI app note?
I'm trying to teach myself about the MIPI-DSI interface on STM32 F4 MCUs and came across this graphic and accompanying description:
As I understand it, the data being transferred is actually 0x94 and ...
1
vote
1answer
380 views
BCD to Gray code converter
The task is to design a bcd to gray code converter. The 5-bit bcd input is represented as A,B,C,D,E while the 4-bit gray code output as D3, D2, D1 & D0.
Could someone help me confirm my truth ...
3
votes
2answers
97 views
Voltage spreading to resistors network
I want to model several electrodes (say 3) and GND on a resistive substrate.
simulate this circuit – Schematic created using CircuitLab
To characterise it, I apply a current on one electrode ...
0
votes
1answer
76 views
Relation data-rate and bit-rate of ADC
I came accross the folowing question, where the accepted answer contains a formula showing the relation between bit-rate and data-rate for a delta sigma ADC. My question is, why that relation is valid....
0
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0answers
38 views
Voltage conversion to drive solenoid for drums
I'm new to electronics and this forum, so apologies if this is a dumb question. I'm trying to drive a solenoid from an undocumented/incomplete "Polyend Perc Pro" controller that I've got hold of, in ...
0
votes
1answer
252 views
How to convert single precision floating point numbers in a file into their 32 bit representation in VHDL
Test data consists of single precision floating point numbers in a text file. These must be read into testbench and applied to a 32 bit std_logic_vector input port. The numbers can be read in as "real"...
2
votes
2answers
64 views
Why can a charger handle more watts at a higher voltage?
Why is it that my charger that has a rating of 100-240 volts and 1.3 amps can handle/input more watts at a higher voltage when doing the formula watts=volts x amps?
In addition, why can't it, at a ...
2
votes
4answers
170 views
How would you wire small computer to run on both batteries and AC power? [closed]
I'm trying to use a motherboard (Mac mini 2018 model) for a project that will require it to be able to run off batteries. The project is essentially building a custom laptop using the Mac mini mobo ...
3
votes
2answers
280 views
Inductor Symbol? What does this symbol indicate?
In the diagram below the symbol labeled L1 is described as:
1.5mH, Core: SM CM20 x 12 x 10
But what does this symbol show exactly? I have searched thoroughly and cannot find this symbol and am ...
0
votes
1answer
148 views
How to convert accelerometer data into G with the ADXL345 digital accelerometer
Am totally new to electronics and the datasheet is very confusing to me, so can anyone please guide me through the specification of the accelerometer? So that i can have a better understanding on the ...
0
votes
0answers
44 views
Can you convert a small gas engine 220 volt starter to work with 120V?
My snowblower has a broken connecting rod so time for an engine replacement. Good price on a new replacement 11HP gas engine on Ebay but it's set up with a European 220 volt starter. The 120 volt ...
1
vote
2answers
126 views
Converting a variable frequency to TTL HIGH and LOW levels, based on a fixed (possible non-fixed?) frequency
I have a square output from an LM324 op-amp (0 and 5 volts) which has a frequency between 1 to 500 Hz (yes, low frequencies). I would like to find a simple way to have HIGH TTL signal when it is over ...
0
votes
1answer
21 views
Conversion Gain Definition for DSB-SC Upconversion
If I multiply a baseband signal \$A cos(C\omega t)\$ and a carrier signal \$B cos(D\omega t)\$, the result is \$\frac{AB}{2} [cos(C-D)\omega t+cos(C+D)\omega t]\$, which is a double sideband, ...
0
votes
1answer
85 views
Swapping 24v dc motor with 240 ac motor [closed]
I have bought a 46ft power boat and it has a bow thruster installed, however the 24v motor has been removed and all of the other parts are missing, that is wiring , relays , control buttons etc.
The ...
0
votes
0answers
62 views
Is it possible to produce electricity with a candle via converting it on a 12v TEC peltier?
Im a Grade 12 Student and planning to work a project on our research paper with an engineering course related proto type machine.
Im planning to make a TEC1-12706 12v peltier converts and produce ...
-1
votes
1answer
246 views
0
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2answers
93 views
Transformer in 127V AC - 5V DC Converter
There is a transformer in this 127V AC to 5V DC Converter. I am trying to get one of them. But I don't know what kind of transformer is and I am unable to find it in my city.
Also, it is so small. ...
-2
votes
1answer
77 views
converting 80Vdc to 50Vdc
I am working on a project that requires an existing power supply outputting 80VDC @ 60A to be reduced to 50VDC. Current is not really an issue in the application.
Does anyone have any useful ...
1
vote
1answer
496 views
DIY ATX PSU turns off when attaching load on 12V rail
I want to convert my old ATX power supply to a simple bench supply for 12V devices. On the label it says it's a 300W PSU where I can use 264W on the 12V rail (see image below).
https://imgur.com/...
0
votes
1answer
73 views
From which circuit, I will be able to measure high frequency signal (in MHz) by using micro controller with 200 Ksps ADC?
I want to measure 20 MHz signal by using microcontroller with 12 bit ADC And 200 Ksps sampling rate.
Which circuit should I design in order to measure it accurately?
0
votes
1answer
68 views
Facing issue while doing ADC conversion
I am new to the PIC programming, and in below program trying to blink LED for specific range of resistance. But when i have debug , i found it out that while loop established to wait till conversion ...
2
votes
6answers
366 views
Converting 0-5 volts (linear) to +2.5 — 0 — +2.5 volts (“vee”)
I'm trying to find a simple way to convert a 0-5 V output from a joystick hall effect sensor to +2.5 -- 0 -- +2.5 V. Here's how I want the response to look:
The output voltage will be sent to a ...
1
vote
1answer
238 views
How to convert high voltage DC at low amps to low voltage DC or AC at high amps?
How to convert high voltage 500 volts DC at very low amps to lower voltage 12 volt DC or AC at high amps? Must I use an electrostatic motor or can I use an op amp?
The reason I am posing this is a ...
3
votes
1answer
717 views
5V (analog) to 3.3V (analog) for current measuring
I want to use an ACS723 current sensor and I would like to transform that signal into digital using the integrated ADC inside a ESP8266 (Wemos D1 mini).
I'm not sure how can I do that.
I think maybe ...
2
votes
2answers
148 views
Current feedback amplifier input structure
This is an input stage of some obsolete CFA (current feedback amplifier):
Current feedback amplifier is a transimpedance amplifier, which converts current signal at its input into voltage signal at ...
-1
votes
1answer
117 views
Need to convert unbalanced to differential input OPAMP
I have the following filter after the DAC chip (currently with unbalanced outputs) working very well, but I need now to change the DAC chip. The new source has differential outputs.
Is there a ...
0
votes
1answer
96 views
AC input not matching DC output
I know this might sound stupid but it has me stumped. I am trying to calculate the average AC power input required for a few electrical devices which will be connected to a generator.
The issue I'm ...
1
vote
2answers
158 views
Is 240V to 24V DC PSU to 120V 60Hz inverter a low cost way to convert 240V 50Hz to 120V 60Hz?
I've been looking at the companies providing step down frequency changing units in the 2000W range, and their enormous size seems to be reflected in an equally enormous price. SO...why can't I just ...
0
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0answers
220 views
How to convert KiCAD pcb file to HPGL/1 for use with old HP plotter?
I intend to use my HP 7475A for directly plotting etch-resistant ink onto a pcb. My problem is that, while KiCAD has an option for HPGL exports, it only generates HPGL/2 compatible files. Those make ...
0
votes
2answers
87 views
Safe assumption for AA and C battery current draw
I have 5 LED candles with built-in timers, but they eat batteries, so I'm hoping to use an AC adapter to power them instead. They are all different with some using AA batteries and others using C ...
0
votes
1answer
293 views
What is the most efficient 3-phase to single-phase AC transformer for a home grid
So a friend of mine is getting electrical power installed for an urban site he bought, and I'm just trying to be a good friend by looking into this.
The company doing the installation recommended he ...
0
votes
5answers
293 views
kW to kWh Conversion
Will appreciate if someone enlighten me. I tried searching online but I am still confused.
Considering I have an hour of power - 25380 kW. How do I convert it to kWh (energy)?
I am not sure if I ...
4
votes
6answers
2k views
How to deal with signed int overflows
Brief background first; I have data from CAN bus of a steering angle which is obviously in hex. The steering angle covers two bytes of a message. The specification document I have says that those two ...
0
votes
0answers
287 views
Convert parallel LVDS to csi-2
I have a camera outputing parallel data and I want to interface it with iMX6 module which accepts CSI-2 camera data.
Are there any ready & cheap solutions to convert parallel into CSI-2.
Lattice ...
0
votes
1answer
420 views
STM32F20x ADC Two Sampling Delay Tconv
I need to calculate the total conversion time, i have been looking through the reference manual but without any luck.
This is my set up:
...
0
votes
1answer
170 views
current control PWM switch model?
As I tried to derive the transfer function of the boost converter(peak current mode control) in CCM and DCM as Vout(s)/Verr(s) using the CC-PWM switch model accordingly to the book of Pr.Christophe ...
0
votes
1answer
469 views
How to process energy (kWh) meter reading data of half-hour interval
If I am to process time series of energy data (point estimate every half-hour interval), and fit it into the following formula for dimension reduction:
Haben's paper
I was advised to use power, not ...
0
votes
3answers
1k views
How convert kWh to W
I want to know if there is an approximate or exact way to know the consumption in watts of household appliances in a house from the monthly consumption that reaches the bill.
Taking into account that ...
0
votes
1answer
326 views
Weighted Resistor DAC Equation
I'm trying to study DAC .. In my reference text book the equation is given as follows
On some online sources 2 is given as the subscript.Please see
https://www.allsyllabus.com/aj/note/ECE/...
0
votes
1answer
1k views
Convert from signed magnitude to twos complement [closed]
If I have the number x=1111001 in signed magnitude what would x be in two's complement? Is it 0000111? What about -x in twos complement?
7
votes
4answers
1k views
In digital systems do we discretize both time and magnitude or only time?
In studies of Digital Circuits or Digital Electronics or Digital Systems, the very first step is to convert an Analog signal / Analog system into a Digital Signal / System.
In this process of ...
2
votes
1answer
790 views
How can I tell what amperage a 12V rated electrical device will run at 5V?
I am buying a TEC 12706, a thermoelectric Peltier.
It's rating is: 15.4V 6A (maximum voltage and amperage). I want to run this Peltier at 5V and was wondering how I would convert this data to see ...
2
votes
3answers
1k views
Why high impedance source in ADC input causes error?
Recently, I had a problem with two sensors (LDR and LM35), when I tried to read them in Arduino ADC, both measures were totally wrong. Searching in the internet, the answers are related with high ...
