current

Hi, how the real power heating current will be a for a pwm signal will be mesured in average? TrueVrms? Or will be the same like normal current. The singal is 0 to 5v. Not negative value, so is more like pulseing dc. For example, two led vf=2v connected to 9v 250ohms with a frequency of 10%hz...

Hello, I'm a student and still don't get this. I've learnt that a current flow between 2 points of different electric potential, but I also read that the current only flows in a closed path. I guess the latter is for true only for steady currents, doesn't it? but in the case of AC, will the...

Is there a way to block current when the load is too low? Say we have a 60V source. If the load is pulling 4A. Current should flow. But if the load is pulling 0.01A, current should be blocked. When the load increases, then it should be unblocked. Does this question even make sense?

Which electrical signal is better for industry among the following? Why? 1. 0 to 10 volts signal. 2. 0 to 20 milliamps signal. 3. 4 to 20 millimeters signal.

I am working on a project that involves monitoring a cars battery. I can measure the voltage of it using a voltage sensor, a display and an arduino but that doesn't tell me much about the health of the battery. After researching, what seems to be the most popular way is putting a load onto the...

I am using a 24V 100A additional vehicle alternator for charging my additional battery bank of 24V.I need an over current /short circuit protection for my battery bank. I am considering using a DC fuse between batteries and alternator. Can you please suggest me an effective brand and also rating...

Hello All, I am working on IOT based Smart Irrigation project. In first phase I shall work on controlling water pump, right now my 7.5hp motor is controlled by "3 phase star delta starter". Could you please provide/point to web source for following queries? 1) Three phase motor don't have...

Hi, I wanted to share a little idea I had (which may have already been discussed), which would be: What if we take a pulsating DC current, modifying it into spiral loopies (Idk if this is possible), and applying this modified current to an Inductor, would that inductor´s efficiency be increased...

I am trying to build a circuit to emulate a lipo battery. Basically the circuit consists in a power supply to emulate the discharge behaviour and a variable load to eulate the charge behaviour. This is the circuit in a simplified way This basically generates 2 circuits...

I'm an automotive mechanic that specializes in electrical/drivability diagnosis. I like helping other techs get a better grasp on this aspect of our trade. Now imagine I'm with another tech and I have a battery and a multimeter in front of me. I measure the battery's voltage and get 12V. Me...

0-5 V to 4-20 mA linear conversion from voltage to current signal transmitter, this is the circuit I want to make. Materials used in the circuit: XTR101 BAT249 BD243 Level transmitter I am setting up the circuit, I get 5 V at the output without connecting the level transmitter. When I...

Dear all, may I ask how to buffer an AM Signal so that it contains more power, maybe 5W for my Remote Control RC? I have buffered the AM signal using op-amp but the power output is just not enough. I have tried using this push-pull transistor pair, but the waveform seems to be unbuffered. I...

Hi can i ask you what is the easiest way to make from 5A 200mA in my power source? The only cruit I found is this but i dont even know how to count it.:( thx for your help

I want to read the voltage and current at the output of the line with the PAC1934 IC. It is stated that the breakdown limit is 40V, but when I give a voltage over 32V on this line, I cannot view it and there is an underlined phrase in the datasheet Page 3. What does it mean? How can I read a...

Dear all, the circuit above is quoted from here, and I wish to try to produce similar graph in LT Spice but I am unsure of it. The LT Spice schematic is correct since I tested it with specific 10V input AC, and it produces linear voltage on its output. However, I want to do an AC sweep on this...

Dear all, may I ask if there is a circuit that produces the following input and output which basically reduces its frequency by 2 times which also basically stretch out the input waveform to produce the following output? Thank you for reading :)

Hi, recently I have been trying to find out regarding resistance of water at high voltages. I may seem oddly obsessed with this but it is forming a big part of a science project I am doing revolving around electrical safety with water and wet things, using detailed resistance values to back...

Dear all, I have successfully simulated a continuous led array that light up consecutively one after another using LT Spice and have even built one on breadboard and it works well. Well, my question is how would you freeze the led and how do we activate the clock inhibit on both the chips? Like...

Dear all, I simulated a radio-receiver circuit, where I have actually build a part of the circuit which helps to amplify a sine 550kHz frequency of microvolts (antenna voltage) into several volts, however, I do not see any amplification on the output as highlighted above where I attached a...

Dear all, I have actually built an AM circuit in real life to combine high frequency carrier sine wave (200kHz) and signal wave of triangle wave at (3kHz), and the output is on my oscillioscope which I am happy about. However, when I try to resonant the wave on my oscillioscope using LC tank...