Questions tagged [heat]

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

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46 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
88 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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47 views

Is a solar still a good way to distill water [closed]

I am trying to create a cheap and easy way to distill water, I learned through some research and talking with people that making a solar still is the best way. I really would like a cheap solution to ...
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2answers
133 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
31 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
75 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
68 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
483 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
53 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
62 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
112 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
34 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
33 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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4answers
84 views

how to calculate maximum temperature of wattage on wire?

how do a calculate the maximum temperature that a certain wattage can get on a wire? I know how to convert wattage to "Celsius heat units (IT) per hour", but eventually the wire has to stop ...
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2answers
78 views

Any DC-powered, fast water heaters,induction heaters? [closed]

Does anybody know a DC water heater? I am looking for a coil type design, so I can place it at the bottom of the container and it will get evenly heated. I need this to be DC and I am going to power ...
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48 views

Peltier questions [duplicate]

Can you use both sides of a Peltier module to distill water? Using one side for heating and the other side for cooling? If so, what type of Peltier module do you need and can you make it solar powered?...
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2answers
59 views

Mosfets get Very hot at relatively low power drop(As E load)

I'm trying to build my own E load according to the circuit I made here: Now not having a thermal lab and very good understanding at how it suppose to work with the thermodynamics but when I set the ...
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1answer
30 views

Inductors and caps on buck-boost converter getting very hot under medium-ish load

I'm currently using a buck-boost converter (generic XL6009 buck-boost like this one) to power a router and fiber terminal from a 12V battery backup system. The reason for using the buck-boost ...
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1answer
63 views

Why is my TPS62162DSGT regulator burning?

I need a 12V and 3.3V power supply for a circuit, so I designed a regulator onto a board to turn the 12V to 3.3V. I used the TI TPS62162DSGT to do this, and my schematic looks like: I used the ...
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1answer
38 views

Which generates more heat in a brushless motor winding's: 36V @100% duty cycle or 48V @75% and how significant is it?

Are the heat losses (in the windings) equivalent for a 36V brushless motor driven by 36V at 100% duty cycle compared to 48V at 75%? While my limited knowledge suggests since the same total power is ...
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1answer
48 views

Are fuse wires in air tightly sealed heat shrink tubes safe?

i've seen a few Videos now, where people use fuse wire as single cell protection layer for parallel battery packs to protect against catastrophic failure due short circuit of a defective cell. Often ...
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1answer
37 views

Heatsink selection and datasheet specifications for Thermoelectric Generator

I have bought this TEG. I am planning to use it as a generator, for energy harvesting applications. I am having trouble though understanding both the diagrams and the meaning of the TEG's ...
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1answer
41 views

Transistor heating problem in slayer exciter circuit

i made this project but it is not working and the transistor is heating up very fast, i couldn't find anything regarding this specific project but as far as i understood i should maybe use another ...
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3answers
69 views

Is ther a standard circuit/component to control the temperature 500W resistive heating element from a PCB?

I have a 500W (230V) cartridge heater element and a K-type thermocouple. I want to use the feedback from the thermocouple to be able to vary the temperature of the cartridge heater. I have no concerns ...
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1answer
77 views

Creating tiny heater for ant farm

Problem description I have a small formicarium for ant keeping, it is basically a tiny glass tank with inside dimensions of 20cm x 10cm x 2cm, filled with sand or soil. Ants I am keeping, like to ...
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2answers
120 views

What can cause oven’s heating element to deform?

What can cause a heating element to deform this way? My oven is tripping the breaker whenever I turn on the heating, LCD and light are working fine, the front LED flickers though! The model of the ...
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2answers
59 views

3 phase heating elements

Is there a simple way of calculating the power (kW) of a 3 phase heating element? I have 3 elements mounted in a pack and inserted into a tube and there are 12 tubes, so 36 elements in total. They ...
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3answers
120 views

Why are one channel's transistors in a power amp getting much hotter than the other's?

(Context: I don't have a background in e.e., but getting better at basic bench work.) I'm repairing/recapping an early 70s German integrated stereo. The power amp output section has four large ...
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3answers
400 views

How to test desert (Dubai-like) conditions when you are in a temperate climate

I would like to stress test an electronics device in desert (think it like Dubai) conditions, such as 40-45 degrees Celsius = 100+ degrees Fahrenheit with direct sunlight and zero humidity. I live in ...
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1answer
198 views

Why op amp is getting warm

Below schematic is a voltage regulator circuit minus the compensations/filters parts (capacitors etc): simulate this circuit – Schematic created using CircuitLab The amount of current the op ...
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2answers
94 views

How do I distribute heat from a heating pad to my electronics?

I'm building an outdoor sensor system (a bunch of sensors and a Raspberry Pi inside a plastic enclosure). A few weeks ago, one of my prototypes got too cold (ambient temperature went below 0deg ...
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1answer
30 views

How to adjust output temperature of a PTC ceramic heating element?

I'm planning to buy a PTC ceramic heating element like the one shown here. I wanted to know how to adjust the output temperature of such an element within the given output temperature range? I'm fine ...
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2answers
68 views

How can I reduce the heat on these pipe soldering pliers? [closed]

I'm trying to use these pipe soldering pliers https://www.garrettwade.com/copper-pipe-soldering-tool-gp.html to compress and heat the ends of nylon rope so that the ends are more finished and secure. ...
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0answers
37 views

Data errors from network device at high ambient temperature(60C)

I have a Raspberry Pi Compute Module 3 based network device that I am trying to get working at high ambient temperatures (up to 60C). When I run TCP packets through the device, I get checksum errors ...
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2answers
160 views

How could I repair these burnt PCB holes and tracks, after my attempted repair? [closed]

I have an Akai mpk mini mkII. A common problem is a faulty power port, female USB B. I could not find anybody that knew how to fix it, so I tried myself. I have never soldered before, so I took a ...
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3answers
105 views

Is there a method to know the temperature value of a microcontroller? [closed]

I want to know if there is a method to know the temperature of the microcontroller to avoid its over heat.
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2answers
109 views

Induction Oven Circuit

I’ve been trying to build an induction cooktop, my inspiration was this post: https://www.instructables.com/id/Powerful-yet-simple-induction-heater/ And after some help , I’ve built a circuit ...
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3answers
68 views

Suspending a Nichrome Heated Coil?

Scope: The scope of this project is to repeatably light several fireworks simultaneously (Mandalorian Whistling Birds Vambrace build). This requires that the only action required to light more ...
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2answers
2k views

Would either of these BJTs require a heat sink?

I am brand new to heat calculations and trying to determine if I need a heat sink for the BJTs or not. Below is the circuit with voltages and current with the data sheet of the used BJTs. The ...
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3answers
68 views

Formula to calculate heating time of nichrome? [duplicate]

Is there a formula to calculate how long it will take for a nichrome (NiCr-A) rod of given dimensions to heat up to a certain temperature (or maximum temperature) for a given supply of AC or DC ...
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3answers
42 views

Turn spacing for helical heating coil?

I'm planning to develop a helical heating coil wound around a ceramic rod. The purpose of this coil is to radiate heat to its nearby surroundings. I want to know if there should be a spacing between ...
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1answer
32 views

Dump loading chip resistors and heat dissipation

I'm building a circuit at the moment which involves switching a 500ma load from a microcontroller to balance a bank of batteries. This circuit runs at 12V nominal. I've built a PCB with 1210 chip ...
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3answers
68 views

Can I build a 4A circuit on cardboard?

I'm planning to build a 12V 4A circuit, and I was originally going to put it on a strip board. However, the board I ordered came broken (and each piece would be a bit small for building a circuit), ...
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3answers
84 views

Help with power supply that only works when warm [closed]

When I power on the supply, The relays click for about a minute, and then it fully starts. I have replaced both relays, same story after replacing them. Moved on to all the electrolytic caps on the ...
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0answers
30 views

Need good and thin heat conductor without electrical conduction

I have a 3D printer with magnetic hot plate and steel sheets. One side of the sheet is uncovered (bare metal) and with the usage the sheet scraped some parts of the heatbed PCB mask resulting in ...
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2answers
62 views

How fast will a resistor heat up under high power?

I am building a circuit for some induction coils on a coilgun, and it will draw about 1.75A from a 12V power source (I know it probably won't be very powerful, but it is difficult to find resistors ...
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7answers
5k views

How to reduce MOSFET heating in Buck Converter

I have designed this Buck Converter which convert 60VDC to 12VDC at 10A. Switching Freq 100KHz. Facing MOSFET too much heating issue. MOSFET ON time and OFF time is decided by a UC3845B based circuit. ...
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2answers
22 views

overloading rated current capability of a connector

If each connetion of a screw terminal (the one in question in the picture) is rated for 3A at 380V, is it probably safe to use each one for 12A at 12V? Is there a way to work this out? Thanks

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