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

learn more… | top users | synonyms (1)

0
votes
1answer
53 views

Is there a thermal sensor technology that can measure an object heat at a distance of 10 meters for Arduino or atmega micro [on hold]

I am looking for a thermal sensor with a distance of 10 meters . In my plan , I would like to recognize objects based on the heat. for example car.
2
votes
3answers
79 views

Generating heat?

I'm an electronic enthusiast (unfortunately I don't have much knowledge on the subject past basic components and volts, current, watts, etc) and I am wanting to know what the best/simplest method ...
1
vote
0answers
60 views

Understanding power dissapation of MOSFET's

I'm currently trying to understand how MOSFET's work in total but come across confusing information when looking into power dissipation of the mosfet; mainly how to calculate it. Say I have a circuit ...
1
vote
1answer
47 views

Which MOSFET is best for me? [closed]

I plan on driving a heating coil of about 1.4 Ohms from a 3-4V power source; which gives an current draw of 2.14-2.85 A. So Watts from the following info is 6.42-11.4 W of power. The MCU will output a ...
0
votes
2answers
27 views

Best way to control heater coil in portable application

I have a resistance wire (kanthal) that is about 2 ohms; with a power source of 3.5V. I'm trying to figure out the most efficient and portable way to control the coil; I'm toying with a mosfet right ...
0
votes
0answers
55 views

Why does load position affect dissipation of MOSFET [duplicate]

I am trying to use two MOSFETS to pass AC through a load but i noticed uneven temperatures between the two switching devices. In the configuration Below the lower FET heats up more than the upper ...
-1
votes
1answer
86 views

Need help with power resistor [closed]

I need to building application where i need to heat aluminium block. Aluminium block will be chilled with water chiller system. This application need to work ~ 2 years 24/7. All this time i need to ...
1
vote
2answers
99 views

Is a relay with a 20 amp rating enough to handle the current from a residential hot water heater?

In Israel the houses usually have a hot water cylinder on the roof of the building which is attached to a solar water heating unit, but which also is connected to an electric heating element which is ...
1
vote
1answer
101 views

What is the formula for Nichrome

Having no knowledge of electricals, I am interested in learning the applications of Nichrome. I understand it has swg ratings. But what I am looking for is a formula that can calculate a particular ...
0
votes
2answers
51 views

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
votes
1answer
34 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 ...
-5
votes
1answer
88 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 ...
0
votes
0answers
41 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 ...
0
votes
2answers
72 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 ...
-1
votes
3answers
135 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 ...
2
votes
1answer
121 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. ...
1
vote
2answers
51 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 ...
0
votes
0answers
66 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 ...
0
votes
2answers
163 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 ...
0
votes
3answers
83 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
votes
1answer
109 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 ...
3
votes
5answers
689 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 ...
1
vote
0answers
76 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 ...
0
votes
1answer
188 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 ...
1
vote
1answer
150 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 ...
3
votes
5answers
1k 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?
0
votes
2answers
94 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 ...
0
votes
3answers
149 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 ...
0
votes
3answers
102 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% ...
0
votes
1answer
43 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: ...
0
votes
5answers
121 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 ...
2
votes
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 ...
0
votes
2answers
56 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 ...
1
vote
2answers
175 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 ...
1
vote
2answers
192 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 ...
0
votes
3answers
83 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 ...
0
votes
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 ...
0
votes
1answer
62 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 ...
10
votes
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 ...
1
vote
3answers
116 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
votes
1answer
110 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 ...
3
votes
6answers
1k 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 ...
0
votes
1answer
223 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 ...
0
votes
4answers
511 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 ...
0
votes
1answer
94 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
votes
2answers
113 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 ...
0
votes
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.
1
vote
1answer
48 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
votes
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
votes
1answer
291 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: ...