Tagged Questions

A circuit that converts a signal from one form to another. Analog to digital, Digital to analog, Voltage to current, Current to voltage etc. The key to understanding is the transformational properties of the circuit as opposed to just amplification or buffering.

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2answers
33 views

looking for a smart way to compare DCDC Converter IC

I'm looking for a quick and easy way to compare DCDC boost Converter IC, to all or most manufacturers. Does anyone know tools, sheets or charts? Thanks!
0
votes
1answer
38 views

Current calculations in boost converter

Hi I am designing a 30W dc-dc stepup converter(15V - 30V) with 50 KHz gate pulse with fixed duty cycle of 0.5. Calculation shows that a 1mH inductor is required for this if i am considering 15% ...
0
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0answers
24 views

How a freewheeling diode in semiconvertor reduces the reactive power demand of the convertor and thus improves power factor?

I can understand that FWD will help in giving reactive power of load inductance to load itself instead of supplying back to the source. But why convertor will draw less reative power ?
0
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2answers
43 views

Step up transformer for low frequency AC with DC offset

What is the best way to step-up a low frequency voltage with a DC offset? I have the following signal coming from a function generator: \begin{equation} V_f(t)=8 Sin(2\pi f t+\phi) + 4 ...
0
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0answers
46 views

Current steering DAC

I want to design current steering DAC with current mirror sources binary weighted and an op amp to convert the current from the current sources to voltage corresponding to the input current. I find ...
0
votes
1answer
124 views

Help me hack this speaker, where would I introduce DC voltage

I have a speaker that runs off of AC (there is a switching converter within the speaker) I'm attempting to convert it to battery power, From my understanding the speaker runs off of 5V (someone else ...
0
votes
0answers
30 views

LM2587T-ADJ Boost Converter Equations

I'm designing a voltage boost circuit that takes 12V on the input and 21V 1.5A on the output. I decided to go with the LM2587T-ADJ since it was fairly cheap and I could get 21V and 1.5A out. But ...
0
votes
1answer
72 views

What is the significance of 8 bits in the context of an ADC0808?

ADC0808 is an 8 bit analog to digital converter. What is the significance of 8 bit? What does it represent? Which capability of IC does it represent?
0
votes
1answer
33 views

Convert a non-isolated converter to an isolated converter

Is there a way to convert a non-isolated converter(such as R-78C5.0-1.0) to an isolated converter.
1
vote
2answers
59 views

Inverting (Buck-boost) converter polarity problem

I have trouble understanding something in the circuit below. It is inverting converter, seems quite easy, but the part I don't get is when the switch is OFF we have forward-biased diode, i.e. plus on ...
0
votes
1answer
47 views

DC/DC Converter doesn't convert to 3.3V

I have a 5V DC input. I want to convert it into 3.3V DC. I'm trying to use VBT1-S5-S3.3-SMT DC/DC converter. I'm connecting my input to second pin of the converter. But it doesn't give 3.3V DC as ...
0
votes
2answers
91 views

How do you choose a diode for a 5v to 3.3v clamping circuit

I have a logic input that is 3.3v and I want to be able to allow it to interface with either 3.3v or 5v input signals w/o worrying about it being damaged. I would like to use a resistor with a ...
0
votes
1answer
24 views

Harmonic distortion and Nyquist rate (Spurs above the Nyquist rate of a DAC)

I have been reading an article during the past few days for a project I am doing and I've come across a point that bugs me out. It is about improving the spurious free dynamic range (SFDR) of DACs. ...
0
votes
3answers
308 views

220V AC to 12V DC transformerless and main isolated converter?

I am trying to build a 220/12V AC/DC max 100mA converter without transformer. I tried so much and burned some circuits. at the end I decide to write here. I searched but couldn't find and answered ...
0
votes
1answer
59 views

Having Two AC-DC converters in series

I have two AC to DC full wave rectifier converters and want them to be in series to increase the voltage. The circuit is basically a generator going into a wave rectifier then a capacitor and resistor ...
-1
votes
2answers
156 views

Converting a 9v Battery powered Device to a 9v dc power supply [duplicate]

I have an old Vivanco MX300 mixer which runs of a 9v battery. I have it in the same place and it's an inconvenience having it run by batteries. Could I use an old AC/DC adapter that would supply 9v ...
0
votes
1answer
44 views

Converting a 10A supply into a 16A appliance [closed]

Is it possible to insert a converter between regular 10A 240V mains supply that would be capable of running a tool rated at 16A, 3500W? Obviously, the tool won't run to it's full capacity but could ...
0
votes
3answers
140 views

Hot MOSFET DC-DC Boost Converter

What: I'm designing a DC-DC Boost converter for a solar panel maxmimum-power-point-tracker (MPPT). Setup: I'm using a TPS2819 MOSFET driver connected to a FQD16N25C N-MOSFET. The TPS2819 is driven ...
2
votes
1answer
56 views

Measuring precisely the efficency of a power converter

I am trying to measure the efficiency of a DC/DC boost-converter in several operating points as precisely as possible. Right now I am measuring my input-voltage and output-voltage with a multimeter, ...
1
vote
1answer
57 views

Current source for boost converter

I'm designing a boost converter to boost 3.3 V to ~25-30 V. I have successfully simulated it in SPICE, but the current draw for converter is enormous - about 8-9 A. How can I handle this nuisance? ...
6
votes
5answers
945 views

Extract 5W low voltage power from 3000W high voltage source

I have a solarpanel array that generates 600V, 5A (3kW). I want to create a small electronic unit to measure the DC current and voltage and transmit this wireless. For this I have an electronic board ...
0
votes
0answers
33 views

Design of L and C in voltage multiplier cell used with interleaved boost converter

Can you provide me with the formula to be used for the design of inductor and capacitor in a voltage multiplier cell used in two phase interleaved boost converter?
0
votes
0answers
37 views

Siemens Frequency Converter 420 start voltage

I use a relay to control Siemens Frequency Converter 420 to start and stop pump, but I found when the pump starts and stops working, the frequency converter will generate a +10 and -7V voltage, but ...
0
votes
2answers
204 views

Convert DC generator to variable AC

Is there a way to convert a DC generator signal to AC and be able to control the frequency and current? Ultimately, I would like to use this signal to measure the impedance of a battery.
0
votes
0answers
48 views

Drawing 2A from 1.5A source. What are the risks? [duplicate]

I have 220V to 12V converter with 1.5A output. My simple motor draws 12V and 2A. Are there any potential risks, when the difference is so small (besides motor being slower)? I cant figure out if ...
-1
votes
2answers
131 views

300 amp 12vdc power supply on a standard(American) wall outlet

I am building a project that will draw around 300 amps at 12vdc, for about 40-60 minutes then it will rest for a few minutes. For this projects application it will be very impractical to build a ...
1
vote
1answer
114 views

Vitesse VSC8221 Ethernet PHY for Media Converter Application

I'm currently designing a media converter board using Vitesse VSC8221. Just as an FYI, the documents for this product are all available at the product page. No NDA is required. When I say media ...
0
votes
3answers
810 views

Converting serial signal (12V-5V) and reading it using Arduino

I'm trying to read some commands from a device that uses non-standard voltage levels for serial communication. It uses 0V for 0 and 12V for 1. For all I know, TTL levels are 0-5V, so if I want to ...
-3
votes
1answer
104 views

Converting 15AC to 5VDC [closed]

I'm currently working on my project that teacher gave.I need to convert my 15VAC input to 5VDC output. EDIT : I am so sorry. I am not experienced user. I should give you more information about where ...
1
vote
1answer
67 views

10GHz Regime Differential to Single Ended Conversion

I'm looking for a board mount (IC) solution that will take the differential output of something like ONET1191 @10GHz and convert it to 50 or even 75 Ohm single ended. I've looked through various ...
1
vote
2answers
2k views

DC to AC converter circuit

I have seen in many books and sites that we can build DC to AC converter circuits. My question is whether there is any limit for the range of DC voltage and AC voltage. Is it possible to get high AC ...
1
vote
2answers
118 views

How can I know whether a random “known not TTL” RS232 device will work with any old random USB-RS232 converter?

I've been hunting around for RS232 converters for a little while now, trying to get my head around the way RS232 works (or at least how it's supposed to), and the way RS232-USB converters (more ...
1
vote
2answers
102 views

Boost Regulator issue at high load

I'm trying to understand the causes of output voltage dropping as my load increases on a boost converter. The switcher i'm using is a TPS61093 from TI. I'm troubleshooting a circuit that someone else ...
2
votes
2answers
741 views

Average output voltage of a fully controlled full wave rectifier

What is the average voltage for a fully controlled bridge rectifier with firing angle \$\alpha\$ ? In a lot of web resources it is said to be: $$\frac{V_{max}}{\pi} (1+ cos(\alpha))$$ For example ...
0
votes
4answers
98 views

Why don't you ever see a “anything” over (cable type)?

Possibly an obvious answer, and I'm new to electronics. You can easily find converters that convert a specific type of signal to another cable to be decompressed on the other end (example, a VGA over ...
1
vote
2answers
431 views

Sensing weight with strain gauge, InAmp, ADC & Pi

I have an SEN-10245 sensor for weighing objects (essentially a strain gauge). The goal is to capture data with a Raspberry Pi, so the signal from the weight sensor needs to be amplified and then ran ...
3
votes
2answers
534 views

How do I make an LED turn on when my output reaches 5v?

I'm a hobbyist and pretty new to many of the components involved, so I hope you guys can help me here. I'm trying to keep the circuit as simple as possible. I made a small variable power supply with ...
-1
votes
1answer
156 views

24V to 12V DC-DC Car Power Supply Inverter Converter Conversion Device,

I am having four 24V 250W solar Panels can I use them with my existing 12V Battery and Inverter with the help of a (24V to 12V DC-DC Car Power Supply Inverter Converter Conversion Device 30A) instead ...
2
votes
3answers
205 views

Beginner A to D Converter

I'm trying to understand the readings I am receiving from the analog to digital converter (ADC). I am using an integrated uIceblue2 microcontroller. The microcontroller in the circuit is a 18F4550. ...
1
vote
1answer
312 views

Using USB to Parallel Port, Send an 8-bit data of Assembly Code [duplicate]

For educational purposes, our professors have DB25 ports on our laboratory rooms, and of course we can only simulate our assembly codes in there Our professor said that it might not be possible to ...
0
votes
1answer
87 views

Power transmission/AC or DC/Cable cross section/Converters

I have unusual project. I want to optimize mass. Here are strict questions (topics) I would like to get answers to. Any help would be appreciated (direct answer or link). I would like to deliver ...
0
votes
1answer
94 views

How long does it take to receive data from a cable, turn it into bits, then send it back out again? [closed]

I need to read in data off of a fiber optic (or copper, though I figured fiber optic would be faster) cable, convert it to bits, do something with it that should only take a clock cycle or two, then ...
2
votes
2answers
906 views

How to Calculate Appropriate R-2R D/A Converter Resistor Values?

I am trying to make a 4-bit R-2R D/A Converter where a +5V signal on D3 would output -5V, a +5V on D2 would output -2.5V, etc. How would the resistor values for R/2R be calculated?
0
votes
0answers
35 views

Industrial level binary decoder

For a project we have to work on, in order to save some digital I/O we need to convert 4 output reperenting a number from 0-15 into a single line. Almosty the same done by 74141 chip, even if it is ...
1
vote
1answer
140 views

SFP pin requirement

I have a question regarding SFP pin requirements. The SFP pin descriptions can be found in the standard document found here. I'm currently designing a high speed LED transmitter and PIN-TIA receiver ...
2
votes
4answers
1k views

Convert a PWM to analogue with double the voltage range?

I have a PWM output (0-5v) that I need to convert to an analogue voltage. Simple = RC filter. However, the voltage range from that analogue voltage needs to be twice that of the input voltage, and I'm ...
2
votes
4answers
330 views

Do digital Anti Aliasing filters exist for traditional ADCs?

I'm currently learning about Analogue to Digital Converters. From what I understand, aliasing occurs if the input signal being sampled has power above the "Nyquist frequency" of the ADC(Sampling ...
1
vote
3answers
113 views

Picking an AC-DC Converter to Minimize Cost [closed]

I'm trying to design an AC/DC converter to implement into a project I'm working on. The project needs to be isolated from mains and shouldn't require more than 1A at 5V. My question for you is what ...
2
votes
3answers
1k views

Is it possible to convert 3 Phase 220V to 110V without use of a transformer?

I am living in an area where line voltage is 220V. If I have access to all 3 phases, is it possible to create a "socket" with output voltage of ~110V, without use of a transformer? This is primarily a ...
3
votes
1answer
273 views

What dc-dc topology to use for a 300W step-up converter?

I am asked to design a dc-dc converter with the following specifications: Vin=24V(2 lead-acid batteries in series), Vout=300V and Iout=1A. My initial choice of topology was the boost converter. ...