Questions tagged [conversion]

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2
votes
4answers
154 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
215 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
72 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
43 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
101 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
19 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
53 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
54 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
85 views
0
votes
2answers
70 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
71 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 ...
0
votes
0answers
175 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
72 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
65 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
245 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
108 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
391 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
106 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
100 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
86 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
123 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
votes
0answers
146 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
83 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
212 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
206 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
1k 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
211 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
300 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
135 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
280 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
235 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
771 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
770 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 ...
1
vote
3answers
823 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 ...
0
votes
0answers
73 views

Measuring rectified voltage

I am designing an analog circuit for motor control for that I need to rectify AC voltage using halfwave rectifier but I don't know how to calculate the rectified voltage in the given circuit below. ...
0
votes
1answer
86 views

Level Conversion RGB LED Strip Noise Resistor (3.3 to 5)

I recently prototyped my circuit on a breadboard that controls a WS2812b RGB LED Strip. The PDIP (breadboard friendly) ATMEGA644 uses 5V logic while TQFP uses 3.3V logic. The LED strip specifies a ...
0
votes
2answers
154 views

Trigger digital interrupt on negative voltage

For a little project of mine (FPV OSD for Quadcopter Camera) I need to detect every time the signal voltage goes negative. The Signal I get is NTSC. Here each line sync is marked by the voltage going ...
0
votes
3answers
535 views

Why not produce household electricity with natural gas generator?

I don't have an engineering background so I apologize in advance if this seems like a silly question. So I noticed natural gas in my area is a lot cheaper than electoeocty. So I was asking myself ...
0
votes
2answers
277 views

Need advice on power supply for a device in India purchased from USA [closed]

I bought an Epson Powerlite HC 2040 projector from Amazon US site. I am going to use it in India. However, the power cable that comes with it has a tag stating (10A 125V). Since I am an ordinary ...
0
votes
2answers
471 views

Pc psu conversion to run 12v tools

Hi I am trying to modify an old pc psu 350w in order to run some 12v and 9.6v cordless tools. I put 2 10Ω 5w resistors in parallel between 5v and ground and I sorted the green wire with ground. I can ...
0
votes
1answer
46 views

A different way for converting to 2's complement

One way to convert any number to 2's complement is by adding the number to 256, if the number can be represented by 8 bit number. For example if we want to convert -100 to 2's complement we do ...
0
votes
3answers
344 views

Can audio isolation transformer be used for AC power isolation?

I am developing my own PLC that is powered off a 24VAC transformer that is shared with a thermostat and some other controller devices. I wanted to isolate the 24VAC going into my PLC to protect it and ...
1
vote
1answer
800 views

EGA display converting to VGA - screen's shaking

I've recently tried to make conversion from EGA (probably, couldn't get scope to verify) to VGA to replace an old factory CRT monitor to LCD. Screen displays fine but it appears to shake vertically ...
1
vote
2answers
420 views

Can I rewire a 240 V 3 phase steamer to a 240 V 1-2 phase?

I have this steamer unit that came in as 240 V, 3 phase that I am trying to adapt to a 1 (2) phase household. The unit needs 60 A and generate 9 kW. As per the manufacturer, and the below diagrams, I ...
0
votes
3answers
452 views

Conversion of 11,200 MWh to a XX MW facility [closed]

How large of a battery storage facility (in MW) would be needed to supply 11,200 MWh of electricity for 4 hours before becoming completely discharged. The facility would be comprised of lithium ion ...
1
vote
3answers
1k views

DC plug pins. Which is positive?

I am trying to convert my old 9V battery operated Wah-wah pedal to a DC converted one, so I can use AC power. I bought a DC plug for it and was told that the center pin is for ground. However there ...
4
votes
2answers
15k views

Reading internal temperature sensor STM32

I'm trying to read internal temperature sensor. Each time, the value from ADC conversion is 296 which results in negative temperature. Should I add something to the code below, enable some peripheral ...
-8
votes
1answer
116 views

Amp limit on 12v to 15v convert [closed]

Can anyone tell me what the the max amperage that would be able to go across this circuit? simple 12v to 15v conversion