Questions tagged [heat]

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

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14 views

Can W1209 be run with 5V DC only

I would like to control a small heat pad using W1209, using a power bank that provides 5V. My circuit is working if I connect step-up voltage controller to the power bank and increase its voltage ...
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24 views

Universal heating seat retrofit to car OEM buttons [closed]

I bought an universal car heating seat and I want to mount it in the car but I am not able to do the wiring. The heating pads come with buttons but I want to change them with the ones that fits on my ...
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56 views

How to keep Nichrome wire at a certain temperature using an Arduino? [closed]

The problem: I'm looking to to heat a small thin metal bowl approximately 4cm in diameter. I need to keep this bowl at about 200 degrees Celsius. I should be able to control this temperature. The ...
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20 views

Switch to activate backup circuit

I am designing a device that will use a small heating element. The client initially designed it to use an incandescent bulb as a heat source. I want to maintain that as a back-up which will not only ...
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42 views

Induction heating directly from AC wall power

I am working on a project converting a 220 volt resistance heating kiln into an induction heating crucible furnace for melting black sand concentrates from a precious metals mine, which are comprised ...
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1answer
200 views

Can you cover tubes?

All of the tube amp designs i see have the tubes exposed to air. Is this a design feature for heat dissipation or is it simply because some find it pretty?
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1answer
43 views

How can such an equation for the temperature of a *black body* be valid in this case?

I am currently studying The Art of Electronics, third edition, by Horowitz and Hill. Exercise 1.6 says the following: C. Power in resistors The power dissipated by a resistor (or any other device) is ...
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2answers
35 views

Usage of 3d printer hotend outside of printer

I am trying to repurpose an old hotend of my 3D printer (Link) as an improvised temporary "space heater" to raise the temperature in a small enclousure by 5-10°. I happen to have a 24V 48W ...
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5answers
95 views

LM317 / linear regulator, estimate of heat capacity

Quick question - what do you think the heat capacity of a LM317 might be? The use case is that I want to ignite e-matches, which requires are short duration high current and would prefer to just use ...
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2answers
92 views

Is energy consumption of the 3kw kettle lower than 2kw kettle? [closed]

On the market there are 2kw 1.7 liter kettles and also 3kw 1.7 liter kettles. I understand that bringing the same quantity of water to the same temperature require same amount of energy, but from the ...
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1answer
66 views

Are vias underneath a SMD component without a thermal pad useful for cooling?

I want to cool this bridge rectifier from Diotec in my circuit to minimize radiated heat by placing a small copper area directly underneath it and connect it to a larger copper area on the opposite ...
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inkbird ITC-708t 1850w max output pid temp controller running 2000w 120v heating element

okay guys forgive me I'm just a dumb electrician/carpenter with a dream. I have caught the bug real bad in regards to home distillin. specifically still building. here is the deal, I didn't think in a ...
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69 views

How to calculate wattage required to heat up air inside an enclosure to 50°C?

I've got a polycarbonate enclosure and I'm going to place a heating element inside it to increase the air temperature in it from room to 50°C, plus a fan to maintain temperature. I need to find out ...
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1answer
33 views

If I use multiple heatsinks in the same enclosure, does the thermal resistance at airflow of each heatsink change?

I am designing an enclosure with 2 identical heatsinks. The thermal resistance is rated at 1.50°C/W @500LFM. If I use 1 fan in the enclosure that produces an airflow of 500 LFM, will each heatsink (...
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1answer
68 views

How can I connect mains to a 230V heating band?

I am planning on using some 230V heating bands for a project of mine. I was wondering what kind of equipment I would need to connect this heating band, which has +,- pins to mains. What kind of ...
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2answers
45 views

Joining nichrome wire within 1140 celsius kiln

I am trying to join 2.5mm diameter nichrome wire in my wife’s pottery kiln (1200 degrees celsius.) I can’t find nichrome inline crimps, copper crimps won’t last. I am resorting to a steel bolt ...
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4answers
145 views

What is the relationship between electrical resistance and heat generation? [duplicate]

An incandescent light bulb has some amount of resistance (let's say 30 ohms) and generates a large amount of heat. It's my understanding that a resistor with the same amount of resistance (30 ohms) ...
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1answer
60 views

Can I melt the plug fuse metal strip using heat?

Since I do not have a lot of equipment right now, I am trying to find an alternative to strip a plug fuse using fire or heat. I tried to put it on heat for about 2 minutes, but when I tried it again, ...
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3answers
91 views

TO-263S heat dissipation

I'm designing a mosfet PWM device with a rather high current. According to my LTspice simulation the mosfet has an average power dissipation of 20W. The mosfet had a TO-263S package ( https://fscdn....
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0answers
40 views

Induction Oven mosfets overheating

I made this circuit inspired by this website: http://www.electroboom.com/ It seemed to work for a few seconds but the mosfets got really hot, they started to smoke and eventually one of them died. I ...
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3answers
143 views

Does putting solder mask over a ground plane influences its heat exchange with the air?

If you want the best thermal exchange with the air, is it preferable to leave a thermal/ground plane raw or to cover it with solder mask? And how important is the difference? (Dave from EEVblog is ...
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1answer
46 views

How is the power dissipated equal to heat generated in an electric circuit?

I am told that P=VI and then I'm told Heat generated is equal to VI*time. does it mean that all the power is heat energy
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1answer
51 views

Designing a battery-powered hair dryer

So I am basically just trying to figure out how long a battery-powered hair dryer would last to see if this would make sense as a concept project. The best energy density I found to reasonably fit ...
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26 views

Cooling requirements of solid state relay

In the manual of my solid state relay it is mentioned that they recommend using a heat sink with the SSR and if the current exceeds a certain limit (almost 2 magnitudes above what I need) they ...
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37 views

Sleep current of automotive device increasing over time

I have something like a tire pressure monitor. It is battery operated. I haven't done automotive before and it is a whole other world besides consumer. I put in all high temp components (i,e, 40-125C ...
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1answer
54 views

Trouble with understanding heatsink datasheet

I am trying to understand the heatsink datasheet provided in the following link: https://www.fischerelektronik.de/web_fischer/en_GB/PR/SK434_/datasheet.xhtml?branch=heatsinks My problem is that the ...
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1answer
91 views

How to connect 15kΩ NTC thermistor sensor to thermostat which requires 10kΩ NTC thermistor

I have a electric floor heating in my house. Old DEVI thermostat broke down few day ago. Problem is that DEVI thermostats are expensive and a little bit dump (not smart). I want to replace thermostat ...
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1answer
44 views

Is it reasonable a remote control works after being heated?

The remote control of my TV set is failing and I probably have to buy a new one soon. I changed battery, including from other device that is working, and there was no improvement. But it is ...
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1answer
33 views

Question On Thermal Sizing Methodology

I'd like to know if I am going in the right direction in my methodology for sizing a thermal solution for some power MOSFETs in a controller. To give some background, I am switching a couple of ...
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3answers
52 views

Calculation of Junction Temperature

I have a PCB and trying to measure the maximum junction temperatures of the major components in the PCB which in full working mode. For example like Input Diodes, Buck Regulator ICs, Aluminium ...
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1answer
88 views

Designing a growing box using a resistance wire as a heating element

I'm trying to design a growing box that will maintain a stable temperature for the seeds germination. I'm planning to use an Arduino with a temperature sensor to control a heating element. I'm ...
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1answer
40 views

ULN2003 IC , should I stack it or should I divide the load?

I am trying to drive 7 led strips. I saw in the datasheet that the ULN2003 IC can supply 500mA per channel. In reality this would be limited due to heat dissipation by the IC. Should I drive 3 led ...
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1answer
99 views

How to apply heat to Lithium ion batteries without damaging them

I am making these batteries into a battery pack, and want to put heat shrink tubing around my batteries for a more professional look. Would the heat that it takes to shrink the my PVC heat shrink ...
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2answers
65 views

Determining acceptable single-pulse heating in a wire coil

I'm trying to determine the max heating allowable in an insulated copper inductor. This is a pulsed application where peak current in the 5kA range is delivered over <1ms. My task is to figure out ...
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1answer
40 views

Material selection of heating element

I am interested in heating coils which are heated using Ohmic/Joule/resistive heating - specifically, how the material for the heating coil is selected. When I read about heating coil materials - ...
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4answers
89 views

Relation between heat & resistance

Heat produced across a resistor can be computed by the following formulae H=I²Rt H=(V²/R)t Going by #1, heat is directly proportional to the resistance whereas going by #2 heat is inversely ...
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74 views

Can I use a variable resistor to control the heating of a heating element?

I want to make something that heats up , can I use a variable resistor to control the temperature of the heating element since it is based on current.
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4answers
98 views

Can I use an insulator as heating element?

If the resistance is what make heating elements heat up , then is it ideal for me to use something close to an insulator as a heating element?
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2answers
142 views

Innovation in heat-sink design? [closed]

20 years ago, if you opened up a consumer-level desktop computer its heatsink would be a "metal grill" type device place on top of the CPU. 20 years later, if you open up a consumer-level ...
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2answers
41 views

MIC5158 how to avoid MOSFET heating

I have implemented DC-DC converter with mic5158 (schematic like in datasheet, no current limit, adjustable output), all work fine, except mosfet heating while medium load. After investigation of this ...
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2answers
102 views

PCB low power self heating component separation

I am an EE that is fresh out of college and and starting at a smaller company, and I have a question about electronic self heating, and how to keep heat from spreading in a PCB to heat sensitive ...
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1answer
71 views

Choosing a non specific heatsink

I am designing a PCB board, and it has lots of components on it. It has like 8 MOSFETs, diodes, fuses, current sensors, a STM32 and other components, and with an exception to a few (like mosfets and ...
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3answers
809 views

How should I design a heat sink for an SMD power mosfet?

I really like the specs for the Infineon OptiMOSPower-Transistor IPT007N06N, but how would I keep this beast cool? Usually I use regular aluminium heat sinks (with water cooling or a fan) for MOSFETs ...
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6answers
15k views

Why don't we make CPUs with 1000s of layers to make use of space in the third dimension?

I am wondering why don't we make processors such as CPUs with 1000s of stacked layers to make use of space in the third dimension now that we have three-dimensional transistors. To be clear I'm ...
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1answer
30 views

Should there be a clearance between a lithium polymer cell and a charging circuit?

I'm building a compact portable console that is going to use a 500ma charger board from Adafruit and possibly a 5v 1a boost as well. Past experience has taught me the chips on those little circuit ...
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2answers
61 views

Lower duty cycle less efficient?

Assume you have a DC voltage V, ideal switch (no switching losses) operating at some frequency f and duty cycle ...
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1answer
67 views

How to measure extremely high temperatures?

I'm interested in building or buying an electric (arc or induction) furnace for smelting & heat-treating metals. Most designs I've seen utilize PID controllers and thermocouples. How are extreme ...
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1answer
116 views

Does anybody know a better way to cool a heatsink that is not a fan? [closed]

I am designing a portable distiller powered by the sun. I will be heating the water with a heating coil and then when the water evaporates I will be collecting the stem in a metal tube(not sure what ...
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1answer
51 views

Is my wiring for this 5m 2812B Led Strip correct?

I'm building one of those infinity mirror cubes: and I have some questions regarding the wiring. This is what I came up with: Green is data, black is ground and red is 5v power. Every strip has 18 (...
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1answer
34 views

Heating element for Air Conditioner thermostat

I currently have a series of thermostats that are connected to a window air conditioner, one is used to check room temperature the other is to trick the AC to run to a lower temperature by switching ...

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