Thermal energy; where it comes from, and how to keep it from damaging components

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Led Strip Heating Up

I have an LED strip with 7.2 Wattage/m and the strip is 3 meters long. The led strip has R,G,B,+12v inputs and I have connected a 12V DC 1000mA power supply to the +12v and attached transistors to ...
0
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1answer
28 views

Designing a Power signal plane to draw heat from a PoE Module

I am designing a PCB that would be powered by this PoE Module. The PoE module provides 5V output and drives a microcontroller, ethernet interface controller and other lower power circuitry. I do not ...
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1answer
77 views

Efficient DC battery power heater

Hello Im currently in the process of building a efficient small DC powered heater and would like suggestions. It needs to be the least amount of watts vs. maximum heat output. The closest thing I ...
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0answers
38 views

heating carbon steel tubing and brass valves .5“ OD x .039 wall x 125” total length

My application: heating small diameter hydraulic tubing to 200 degree F. with a single 120 VAC 20 amp power supply. I have used heat trace tape, but am looking for a better way to accomplish this due ...
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2answers
63 views

Heat transfer tape, or paste, or nothing

I am installing a bunch of LM317 and LM337 regulators in TO-220 package. They will have 2 heat sinks on them each. Occasionally they will have to run close to their maximum continuous rating and can ...
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3answers
128 views

Instantly Hot Transistor

I have a TIP42G PNP transistor, and when I used it, it instantly smoked. Would it be because I shorted the base directly to ground? (through a button for the initial turn on, and through a 2n2222 for ...
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1answer
111 views

Thermal grease / adhesive: Higher Conductivity & Lower Impedance or vice-versa?

I have been reading a fair bit about Thermal grease & adhesive comparisons. There is a lot of information out there - even including tests made with tooth paste(!), which is mind blowing for me. ...
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2answers
42 views

Solar panels for a DC solar pool pump

Ok - total newbie question here. I'm trying to work out the size or number of solar panels required to run a DC pump for use as a solar heating system for a swimming pool. I've located what looks ...
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0answers
53 views

Best heating cable for a DYI heating blanket

I want to make an electric/heating blanket that will work with heating electric cable. I will use a computer AC adapter that output 19V 3.16A, and this dimmer to regulate the heat and a heating ...
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2answers
95 views

Battery heating up instead of a coil in a simple heat circuit

I am making a simple heat circuit using 9v battery and a coil made up of AWG 18-gauge copper wire (electrical engineering newbie working on a fun project). I followed these steps ...
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3answers
71 views

Making my own kotatsu

I want to make my own kotatsu (a small table with an heating element underneath) and I'm considering using a "heat lamp" as the heat source (one of those aimed at reptiles, fits in a normal light bulb ...
3
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1answer
97 views

Choice of heating element (power resistor)

Basically I need heating element which can heat up small volume of air (lets say shoes box size) up to about 60 C degrees. I am going to use 25 V source supply with 2 A current. What I thought about ...
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5answers
570 views

Hot wire cutter. Can I use copper wire

I am not from an electrical background and this might sound silly. What I am trying to do is create a hot wire cutter to cut thermocol(Styrofoam). The sugestions from internet is to use Nichrome but I ...
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0answers
65 views

Are there thermovision cameras available to hobbyists?

Years ago, while investigating a short, it came to me that using a thermal vision camera would help an electrical engineer in a lot of situations. Checking it then, such devices were prohibitively ...
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1answer
163 views

Using a transistor as a heater

I have the task to build and control 35 heaters, 10 W each. I first thought about using power resistors (like in this datasheet) as heating devices, but they'd need high currents in order to get the ...
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1answer
137 views

Can this be reworked with a hot air gun?

I posted before about the Microchip RN4020 (Bluetooth Low Energy) PicTail failing. I have some spare RN4020 modules and access to a heat gun. If I can take this RN4020 off and put a new one on, how ...
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5answers
865 views

What causes cables to get heated up and melt in a circuit? (DC Circuit)

I know lots of current can cause heat but what else? Can too much resistance in thin cables cause heat?
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2answers
89 views

How do I correctly estimate heat output for heater wire

This is based on a problem that came up today. During the course of this problem I realized that I wasn't so sure I understood the relationship between wattage and heat produced. In the past we did ...
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3answers
139 views

Can I put 2 voltage regulators (5V) in parallel to dissipate the heat better?

I connected around 10m of christmas light LEDs to a 5V voltage regulator (lm7805). It gets quite hot, put I can still touch it without burning my finger. So in is within its temperature range (120 C ...
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3answers
100 views

Heat dissipation

I have a computer power supply and I'm wanting to make it a variable voltage power supply but I have to have a load on it which requires some resistance. I have connected a 10 ohm 10 watt at 10% ...
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1answer
92 views

What could it mean when a chip will only work right when its hot? [closed]

My screen started dieing like a year ago. Initially, I noticed that when turned on when cold, all I got was snow on the screen. It would quickly go away though as I restarted the screen a few seconds ...
0
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1answer
41 views

Safely Driving a Brushless Motor

I am currently building a quad-copter out of an Arduino. I decided to make my own ESCs using MOSFETs, EMF sensors, and the Arduino. These are the motors that will be driven: ...
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5answers
117 views

How greatly can heat increase resistance?

A conductor has a resistance of 0.001 Ohms, at room temperature, by increasing the heat x100 degrees Celsius how greatly would that effect the conductor's resistance? I'm trying to find the ...
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1answer
94 views

What is a typical light bulb screw temperature? Is it safe to put a microcontroller there?

I'm working on a small engineering project that involves putting a microcontroller inside a screw of a light bulb and I need to find what are the typical heat outputs of 60W bulbs and strong (like ...
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2answers
54 views

Max temperature of PTC heater, need tip

I have some difficulty reading specifications for PTC heaters, more specifically the ones on here. I understand that a PTC heater does not, inherently, rise above a specific temperature. In the ...
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2answers
142 views

Heat output element

I'm building a little quiz game in Arduino and I already have it displaying a multiple choice question and people can answer by pressing pushbuttons. But anyways now I wanted to know if it's possible ...
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2answers
183 views

Will an electric heater coil stop drawing power when the surrounding temp is the same as the coil's temp?

I am trying to figure out if I can melt Aluminum cans using a heater coil from a toaster oven. I've already used q=mc∆T and q=m*(Latent heat of fusion) to figure out how much energy is required to ...
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3answers
82 views

Miniature heater with more-or-less constant temperature. Need tip on element

I'm a software engineer with very basic knowledge of electronics. I have a project in which I want to make a small (cylinder of length about 100-150mm and diameter 20-30mm), localized heater that ...
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1answer
55 views

How is the heat lost in a peltier distributed?

I'm looking at peltier elements to heat my project. I seem to find that most are about 5% efficient, but how is the 95% turned into heat distributed? Does the cold side get 47.5% and the warm side ...
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1answer
60 views

Help compare my results to the maximum power transfer theorem and explain using algorithms

So below is an image of the relationship between efficiency of a circuit and the resistance of the load, as you can see the maximum efficiency occurs when the two resistances are equal. here is a ...
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8answers
2k views

How to check that blast furnace is full?

I'm working on blast furnace oven, I need to check if it's full with materials in levels one , two and three as shown :- The main problems: It's very hot as you see in the picture (200°C to ...
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3answers
106 views

Is there a difference in heat produced on a conductor between AC and DC at the same amperage and voltage?

Is there a difference in amount of heat produced on a conductor between AC and DC at the same amperage and voltage? For example if you ran 50A at 480V through a conductor would the heat produced be ...
0
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1answer
98 views

Heating coil over-drawing current

I am currently designing a circuit that includes a nichrome coil used as a heating element. The wall adapter is 25V 5A DC, which leads to different buck converters that takes it down to the ...
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6answers
971 views

Why is electric heating so expensive? [closed]

The loss of electricity in transmission and distribution is only 6%, so why is it that electric heating is so inefficient? I would imagine that the generators at power plants are far more efficient ...
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1answer
188 views

Could I create Peltier cooling module from iron and copper?

I want to create a tiny, easy to maintain one-purpose distilation unit. It's supposed to distilate expensive tetrachlorethylene to clean it from whatever is dissolved in it. There are millions of ...
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4answers
424 views

Controlling a 1000W radiant heating element with dimmers

First I would like to mention that I am a stranger to electrical components and I come from a mechanical engineering background so please keep that in mind when answering my question. I am trying to ...
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1answer
91 views

Creating Heat with Resistors

I am trying to create a cheap and small heating element capable of reaching temperatures of at least 260 degrees C. I am considering using a resistor. Is there such thing as a cheap resistor capable ...
4
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2answers
111 views

MOSFET package with lower thermal resistance than D2PAK

As far as PCB surface mount MOSFET packages go, does D2PAK generally have the lowest thermal (junction to ambient) resistance? Are there other packages with lower \$R_{jc}\$? This question is based ...
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0answers
62 views

Inducing Eddy current in wet clothes

Is it possible to induce eddy current in wet clothes and dry them using the resistance heat generated? I don't want to connect any wires to the clothes.
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1answer
46 views

Thermoelectric couple heating on both sides [duplicate]

In college my physics professor showed us a thermoelectric couple powering a fan. He also explained how if you apply a current it cools one side and heats the other side. I have been working on a ...
0
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0answers
73 views

Simplest way to detect body heat

I need to detect how hot/cold a person is with a sensor (or multiple sensors) in close contact. I've looked at temperature sensors such as 18B20 and TMP36 but I'm not sure how to detect if a person ...
0
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1answer
262 views

Flyback NE555N driver and mosfet overheat

I have built a small and very simple flyback SMPS based on NE555N IC. The circuit exactly I did built from is shown below: It works nicely for small loads. However I have some issues with it: ...
2
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1answer
122 views

Something better than an H-bridge to drive motor?

Is there something better than an H-bridge to drive two motors using the ATmega8 with a 7V power supply? My teacher said the H-bridge overheats and is bad. Is there a better solution? For instance: ...
2
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2answers
319 views

Can Lithium Ion Batteries be used to generate heat for a RC Hot Air Balloon? Any particular heat-generating device?

First the background: OK - this is a personal project that I've always been interested in trying but never got around to it - a remote controlled hot air balloon. Sadly I am not technically-inclined ...
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1answer
205 views

L293D overheating

I have an old RC car. I removed all electronic from it, just left the plastic and the DC motors. It has 2 DC motors(1 for moving, 1 for left/right). I decided to attach arduino to it, while ...
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3answers
394 views

IC - Case temperature vs Operating tempaerture

When datasheets lists(MAX9744) that the normal operating temp are b/w -40 c to 85 c but the case temp should not be up above 165 c what are they suggesting. How come an IC work if its case temp gets ...
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1answer
218 views

Difference between infrared heating tube coatings?

I'm converting a toaster oven to a SMD reflow oven and have found the thermal momentum of the resistive elements to be a problem (standard dark-grey type). So I've been searching online for some ...
0
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0answers
29 views

Average heat generated on thin circular plate in harmonic magnetic field

I have problem with this equation, I have final equation, but I don't know steps, how you get this equation. There are the eddy currents in thin circular copper plate thickness h and radius a, in a ...
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1answer
599 views

Why is my N-channel MOSFET getting very hot and the power it provides to device increases with temperature?

I have a fairly simple situation: N-Channel MOSFET with base connected to Raspberry Pi's 3.3V source connected to ground and Drain connected this way: +12V ----> Vacuum Cleaner (60W) -----> Drain. Guy ...
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2answers
1k views

How do I tell what gauge wire I need?

I've been working on providing power for high current applications for my project. I'm working on a project with high current (or at least compared to what I'm used to...) What a lot of people point ...