Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [resistive]

23 questions
6
votes
2 answers

Hot Glue Gun NTC Heating Element?

I decided to take apart a cheap hot glue gun to see how easy it would be to replace the heating element to power it from battery instead of mains. I found the crystal heating element sandwiched between 2 metal plates, kept in compression against the…
Justin
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6
votes
1 answer

Cutting Touchscreen

For a small hobby project I would like to use a resistive touch overlay. However, sourcing the correct size seems near impossible. Can I cut a resistive (4-wire) touch screen to fit?
Arne
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3
votes
3 answers

How to solve this resistive network using divider rules and ohms law

I have a homework problem I've been trying to solve. So far I think I'm using the right formulas for the calculations. I just need help finding: The total resistance of the circuit, finding Vab using the voltage divider rule, finding IR2 using…
Omuse
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3
votes
1 answer

How to drive a sensitive, constant-current, 1MHz resistive device?

I am currently working with sensors which are mostly resistive (100 to 600 ohms on average) and need to be fed with a controllable bidirectional constant current (from -1mA to +1mA with a resolution of approximately 1µA). I need to measure the…
dmp32
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3
votes
2 answers

Thevenin equivalent resistance of circuit with diagonal resistors

I'm trying to find the Thevenin equivalent for part A of this circuit: I begin by opening the circuit at the dotted line of part A. Then I try to find \$V_{oc}\$ across the two terminals that are open. I can see that the 47kΩ is in series with the…
user3266738
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2
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2 answers

Sign on range hood light switch says "incandescent or resistive 120V AC Only"; does this mean no CFL or LED?

The switch includes a standard-looking rheostat; I have read the issues around using dimmer switches with conventional CFSs. I don't value the "dimmer" function on the hood -- just want to see the food that is cooking when the room is not well…
hangzhouharry
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1
vote
1 answer

Possible Explanations for Unexpected Results: Negative Resistance and Consistent Short-Circuit Current and Open-Circuit Voltage

My objective in this circuit is to find the value of RL that achieves maximum power transfer. simulate this circuit – Schematic created using CircuitLab To do this, find Voc and Isc, as shown below. simulate this circuit Upon performing the…
benjamin_ee
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1
vote
1 answer

How to design a 3-phase resistive load bank?

We are trying to design a 3-phase resitive load bank to test some step up transformers. We are receiving 3-phase 208v and stepping up to 3-phase 600V with 3-step up transformers wired in delta. Its a floating system Each step up transformer is…
Douglas
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1 answer

Question to "Start-up into resistive load" diagram of LTC3106

There is a diagram on page 7 of the LTC3106 (Datasheet) named "Start-up into resistive load" and i couldn't find any explanation on the internet how to understand it. My assumption is: This diagram shows what load is allowed at the output of the…
S.G
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1
vote
1 answer

Resistive and inductive load on same transformer?

Is it ok/safe to put both a resistive load (heating elements) and inductive loads (servo motor) on the same leg of a 240VAC transformer? I have some electrical knowledge but it has been a while since I've dealt with servos, and heaters. I sort of…
JoeChiphead
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2 answers

How will my power/current draw change if I switch from 120 VAC to 12VDC?

I'm designing a heater to run off of a 12V battery at a field weather station. As I have no formal electrical training, I'm having a challenge coming up with an effective power budget. Note: This is similar to other questions posed on this Stack…
Keegan Smith
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0
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0 answers

Triac get burnt after driving 2 min 1.5kW resistive load

I am trying to drive a 1.5kW heating resistance using QJ6025LH5TP triac. Schematic and PCB layout. So the thing is that my circuit is working for a while and I trying to measure the temperature from behind the PCB using an infrared thermometer.…
EdhelSoldier
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0
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1 answer

Implement a voltage feedback method to reduce the crosstalkin resistive matrix

I'm new in electronics and i want to develop a resistive matrix that is pressure sensitive. Right now, I have a 7x7 matrix and I'm implementing this using multiplexers, a reference resistor and an Arduino. The Figure below demonstrates what I have…
WilsonMCS
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0
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0 answers

Driving an array of resistive loads on high side with as little parts as possible

I'm trying to switch an array of resistive loads at 12V as fast as possible using least amount of parts due to limited board space. I have tried to find sourcing darlington transistor pairs but they are either not able to provide at least 500mA per…
Mr_Intro
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0
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2 answers

Impedance of the circuit between given points

I am trying to learn one and two port networks and the book introduced Determinants and minors to calculate the impedance of the circuit. Kindly see the following question: I have managed to do the part (a) but parts (b) and (c) are not making any…
Hassaan
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