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

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61 views

What is the best way to configure an electric fireworks igniter

I've seen a bunch of tutorials on creating a fireworks igniter using, a resistor or a piece of copper wire and a 9 - 12 v battery. Basically you the resistance from the small piece of copper or 1 ohm ...
0
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0answers
23 views

Nichrome or Kanthal wire specs for kiln

I plan to build a kiln that can achieve 1000C - 1100C in temperature. I bought a PID controller and SCR voltage regulator to control the temperature. But I want to know if there is a detailed ...
0
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2answers
39 views

Setting Kanthal Wire [on hold]

I have a furnace that is heated by a small Kanthal coil. The core is formed by wrapping the Kanthal wire around an alumina cylinder. One problem we have had is that the wire springs out of shape after ...
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1answer
37 views

Avoid heating with high current

I am new to electronics and just tinkering with it first time. I have laptop charger with 19V/3.42A and connected to 12v regulator and 3.3v regulator to get two voltages - 12v and 3.3v. I am going to ...
12
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2answers
493 views

Is it proper to use an internal layer as a heat bed if I want to warm my multilayer PCB?

I need to design a circuit to warm my PCB. There are many ways to build up such circuit. But I learned from a post "Warming PCB in a low temperature environment" that maybe I can use traces as heater. ...
0
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2answers
75 views

How to measure resistance

I have a project to build heating element using silver ink. My specification is the heating element must be in range 2 to 2.6ohm I will design the circuit for the heating element, but have a problem ...
2
votes
2answers
151 views

Is over charging the phone while using headset risky [closed]

I recently came across a post in social network which was claiming to be a news about a girl getting electrocuted during her sleep with her headsets connected to the mobile and the mobile being ...
0
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1answer
72 views

Do 5V high power heater elements exist?

I am attempting to regulate the temperature inside a not so small (maybe 0.5m^3) box above the ambient. Currently the design is using a bathroom heater spare parts heating element. 230VAC are passed ...
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0answers
28 views

Amplifier chip overheats without input; how do I determine whether the problem is internal or external?

I'm building a boombox around a Lepai LP-808 amplifier, which seems to be a thin wrapper around the Sanyo LA4636 chip (with some treble and bass adjustment added). The chip has begun overheating ...
0
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1answer
71 views

Area of Copper Needed to dissipate 24 W

I need to know the area of 2oz copper needed to dissipate 24 W. The max temp is 100 C and the ambient temp is 40 C. Any equations I can use?
-1
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1answer
37 views

Is matching an infinite switch rating to a heating element required? [closed]

I want to use a Robertshaw universal infinite switch rated at 15 Amps to power a heating element to boil water in a stainless steel tub. The voltage is 240 VAC. A heating element greater than 3600W ...
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0answers
42 views

Preheater in Otoscope

Hi i need to know how the Otoscope is heated for a predefined perion.What kind of material is used as preheater.I couldnt find a perfect information regarding this online.
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2answers
47 views

Creating small heater

I need to make a small heater. I was looking at this project: http://www.makeuseof.com/tag/make-your-own-temperature-controller-with-an-arduino/ but I need to design the heating element. I was ...
0
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2answers
93 views

Why would MOSFET transistor heat up?

I had a circuit on PCB. I used solder with acid-core to solder it. This combined with my mess soldering caused various shorts between components. One of those components was MOSFET transistor BUZ11 ...
0
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1answer
47 views

Controlling an electric water heater

I'm trying to control the temperature of water heated electrically. On devices sold commercially I see that temperature is not being controlled, and the heating elements are either turned on or off ...
0
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1answer
41 views

Heat Kathal with D Cell batteries

I have Kanthal A1 26AWG (3.21 Ohms). I need to heat a small cardboard box (Tissues box) 15 degrees Celsius over the room temperature. And I am using 2 D Cell Batteries of 1.5V. I coil the Kanthal ...
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4answers
142 views

Heating a 1km long wire to 110 C using a 12v supply from a car cigarette lighter

I am a complete newbie to anything electrical/electronics. I am doing a project where I need to heat a 1 km long (Nichrome/Kanthal) wire to up to 110 degree Celcius. The only power supply available is ...
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1answer
59 views

MC33063 heating problem

I'm using a MC33063 to generate a -9V supply to power 7 TL084's. I'm using a 7805 regulator to power the 33063 circuit. However, the IC and the regulator heats up a lot -- I burned one IC due to that. ...
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1answer
66 views

heating problem - L7805C [duplicate]

I'm using a L7805C voltage regulator , to power an SMPS circuit. But its getting heated after 10 min or so , even if I've put a heat sync. SMPS IC is used to convert +5V to -9V.
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4answers
116 views

Is there a Formula to Predict Delta Temperature based on previous trend?

I need a way to predict delta temperature curve based on previous trend. I do a lot of heat rise testing on electrical conductors and I would like to be able to atleast get an approximation of the ...
1
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1answer
174 views

DC-to-DC voltage booster mosfet heat problem

I'm tying to understand boost and buck converter designs. Recently I made a prototype of a simple boost converter, used this as a reference. Used parts are as follows: Transistor - IRF3205 Diode - ...
1
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0answers
40 views

fuse metal alloy with high springiness?

Is there a fuse alloy that would have the same springiness as this except with a little wire that comes out and that plugs into something, so that it could be machined and pressed from one single ...
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0answers
69 views

transistor heat dissipation

In a transistor, the collector is kept most wide among the three regions. Why is that so? If it is for dissipating heat, then why most heat is generated in the collector and not emitter?
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1answer
76 views

Class AB amplifier becomes hotter, using more current and then becoming even hotter

In the circuit above a Class AB amplifier (this is one also called Class A+AB) can be seen with Q1 and Q3 used to get the current biasing voltage for Q2 and Q4. transistors Q2 and Q4 become hotter ...
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0answers
30 views

Correct number to use for thermal analysis

When I'm going to do thermal calculations for a chip, say for a heat sink design. I usually look at the maximum total power the chip will draw, and assume that is the maximum heat it will dissipate. ...
0
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1answer
82 views

How to design a heat bed / radiator using resistors?

I have to add some resistors to an aluminium plate on a 3D printer, because it only goes to 67'C without foam insulation. The heated bed currently reads 1.6 ohms (90W at 12V) I wish to add about 96W ...
0
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1answer
93 views

How Much Heat will a 1800 Watt Bulb Produce?

I plan on placing a Metal Halide 1800 watt bulb 20 inches in front of me (not exactly in front but over my head) - will this produce more heat than I can handle? Someone said the question was vague ...
1
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1answer
47 views

What is a reasonable sustained current load for a typical AA Li-Po battery?

I would like to build a cutdown mechanism for a balloon's nylon rope using NiChrome wire. To make the cut-down mechanism as simple and cheap as possible, I want to stick to using AA batteries. To ...
12
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3answers
4k views

Why does a processor get hot?

I would like to understand how the computation process causes the processor to get hot. I understand that the heat is generated by the transistors. How does the transistors generate the heat ...
1
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0answers
86 views

How to Drain Heat from a High Intensity Lightbox (2200 watt)? [duplicate]

As you may know, I'm working on designing a "lightbox" that will contain 3 high intensity metal halide bulbs - consuming a total of 1600 - 2200 watt. The purpose of the box is to generate ~40,000 lux ...
0
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1answer
31 views

High Energy Metal Halide Bulb Heat?

I am building a custom box from wood (around 14 inches by 10 inches by 10 inches) to encase 3 high energy Metal Halide Bulbs (400+ watt each). The box will be opened and closed intermittently, ...
1
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2answers
91 views

Can I safely place a 60w between a 50w LED and a large heat sink that can dissipate 100 watts?

Today I have learned that Peltier devices can be used to generate electricity. I have a set up with a 50 watt LED which is glued to a very large heat sink that cools it without any fans (that can ...
0
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1answer
79 views

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

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
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3answers
86 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 ...
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0answers
71 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
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1answer
53 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
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2answers
38 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
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0answers
56 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 ...
2
votes
2answers
169 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
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1answer
182 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
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2answers
65 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
40 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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votes
1answer
153 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
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0answers
42 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
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2answers
87 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
142 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
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1answer
164 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
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2answers
95 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
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0answers
141 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
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2answers
599 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 ...