Questions tagged [heat-protection]

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Can a CPU heatsink be used to cool a TO-3P or a TO-220?

I want to know if my thermal design is appropriate for dissipating 72W of heat while keeping the junction temperature below 150 °C (I am trying to cool an SFH154 that comes in a TO-3P package). My ...
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1 answer
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What generates more heat: inverting to 0s or to 1s in Flash memory?

I was not able to find an answer via web search. The question came to my head after reading https://www.networkworld.com/article/3049428/humidity-not-heat-is-a-hard-drives-biggest-threat.html: The ...
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2 answers
60 views

How much thermal headroom?

How much headroom is good design practice for a junction temperature calculation? If a junction can be max. 150°C for example, what is the closest temperature one can be under and still feel "...
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calculating if heat from regulator can start a fire or melt ffc

I have a flat flex cable (to a display module) close to a regulator (maybe the ffc are even touching the regulator) in a product I am making. Worried about if the regulator's heat will destroy the ...
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1 answer
138 views

Does the thermostat cause arcing?

I am planning use to resettable thermostat switch in my circuit. I will use it to turn off the optocoupler input. With 5 volt, current is 5-10 mA in optocoupler LED. But I'm worried that an electric ...
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0 votes
1 answer
64 views

RF Module Gets Too Hot

I'm using the RFM98PW-433S2 1W(+30dBm) 433MHz RF module. After a couple of minutes of working the module gets to above 70°C temperature. Probably reaches 90°C and above after couple more minutes. I ...
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1 answer
49 views

Solid State Relay Heat Release

I want to use a SSR (AD-SSR6T25-DC-280A) to switch on and off a 24 VAC water solenoid valve. The solenoid has an in-rush current of .9A, with a 400mA holding current. I want to mount the SSR in an ...
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3 answers
63 views

Counteract joule-heating

I've got a project where I have an intricate structure made of fine wire, through which a comparatively large current will be sent. Unfortunately, the conductor itself respons poorly to heat, and if ...
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3 answers
337 views

Can you connect two lm317's either in series or parallel to help spread out heat?

I am designing an adjustable voltage regulator. The regulator will have be able to swith between max Vout of 9V, 12V, 15V and 18V and will have a variable resistor that can adjust the voltage from 1....
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3 answers
139 views

What is this thermal adhesive? (heat transfer compound)

Well generally I I encounter this thermal adhesive. for example in inverter (brand: allen bradley). But it is different from I've seen before. It is very solid and generally using at very strange ...
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1 answer
93 views

How to keep heat away from an electronics enclosure?

I’m converting a simple cooking hot plate to have it’s temperature controlled by an arduino, with an lcd. It’s metallic casing gets really hot when the plate is turned on. As I’ll remove the original ...
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1 answer
34 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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0 votes
1 answer
45 views

Is it okay to leave regulators heating at higher end of range of operating range?

IC operating range -20 to 80 degrees Celsius Regulator IC application spec 12V in, 5V 1.5A output Is it okay to keep IC running at 70-75 degree Celsius (with heat sink) all the time, circuit will be ...
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-1 votes
1 answer
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Transformer cooling difference between water cooling and air cooling [closed]

I just know air cooling method is cheaper than water cooling method. Please tell me what is the difference between air cooling and water cooling? And if you could please use some pictures to explain ...
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1 vote
3 answers
116 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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0 answers
33 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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1 vote
0 answers
61 views

Protect a PTC from being touched

I am considering using PTC to protect PS/2 keyboard +5V power line. As it is low probability that there's something wrong will be inserted into the 6-pin mini-DIN connector, IMHO it is not necessary ...
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2 votes
2 answers
83 views

Soldering 18650; is an FX-888D good enough?

So, I want to make a 18650 battery pack but don't have access to a spot welder. I'm wondering whether a FX-888D would be good enough to do the job quickly and so minimize risk of damaging the cells. ...
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0 votes
1 answer
183 views

Trying to get 2 Amps out of 3 Amp Regulator (MIC29302WU)

I am trying to get 5V,2A out of the MIC29302WU (TO-263 package) with an input voltage of 12V. The voltage drops to around 2.2V when trying to supply even 1.3A. Blowing canned air over the regulator ...
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1 answer
429 views

LF33CV voltage regulator overheating

I'm trying to turn on a laser (3.3v - 4.5v, 100mw) using a 9v battery and LF33CV as voltage regulator(TO220 package, 3.3v output). After 20 seconds the voltage regulator is getting so much hot. I was ...
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1 vote
1 answer
589 views

Will WS2812B overheat because of epoxy?

So I'm currently working on a standing LED lamp with WS2812B LEDs. The length will be about 1.2m with 60 LED/m. I'm planning to cover the LEDs with white epoxy to diffuse the light and have a nice ...
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-1 votes
1 answer
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Trusted and small price 220 to 5V

How do you choose your 220V to 5V components? For example, should I trust one like this that it doesn't heat too much or that it doesn't catch fire? The component needs to be relatively small priced ...
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22 votes
9 answers
8k views

How to solder a 70 °C (158 °F) thermal / temperature fuse

For my DMX project (schematics is not important), I soldered this temperature fuse which has just two leads (see picture below). The fuse doesn't work (meaning it does not conduct electricity) ... ...
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-2 votes
3 answers
128 views

Does a heat mat need current protection? [closed]

Would any sort of extra circuitry be needed for connecting a heat mat into a power supply? The mat says it draws 4.1A and the power supply can provide 6A, both working at 12V. Will it work as is, or ...
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3 votes
2 answers
329 views

Can a heatsink protect a PYNQ-Z1 board from damage? If so, which one should I use?

I'm going to purchase a PYNQ-Z1 FPGA development board from Digilent (Link: https://store.digilentinc.com/pynq-z1-python-productivity-for-zynq/). However, some of the comments on the linked page say ...
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1 vote
0 answers
72 views

How to protect electrical parts from heating coil

I'm trying to diy an electric lighter with a 3.7v lithium battery, an on\off switch, and a micro lipo usb charger. Already connected the coil and everything works as expected. The only problem I ...
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-2 votes
2 answers
253 views

What do we mean by bidirectional TEC?

I have designed a H-Bridge driving circuit for TEC where the polarity across the TEC (load) changes according to heating and cooling application. But when I am searching for TEC Module they have ...
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1 vote
1 answer
206 views

Heat sinking ideas for an HZIP package

I'm building a design involving Toshiba's TB6600 chip which has an unusal HZIP25-P-1.00F package. I've seen implementations where folks have bent the pins manually and soldered them horizontally such ...
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14 votes
3 answers
4k views

Is it a good idea to use a single heatsink for two IC's?

I am using a 7805 IC along with a diode bridge Br805D (bridge rectifier) IC on a general purpose PCB, with a 220V / 50Hz AC input. Both the components tend to heat up really quick and I plan to set ...
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0 votes
1 answer
62 views

Internal thermal limit of LF00 voltage regulators

Reading the datesheet of the LF00 voltage regulator series leads to a basic question to myself. The basic facts at the beginning of the sheet telling me, there is a logic with an INTERNAL CURRENT ...
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0 votes
1 answer
170 views

most resistant substrate layer to embed a specific wire

I am in process of embedding a wire in a choice of substrates. I would apply voltage so much as to heat it (the wire) to 220 degree Celsius max. What are the best choice of substrates I can use so ...
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1 vote
1 answer
765 views

I am designing a heater and i want to hold the nichrome wire inside a frame, what can be used?

Can i use cement for holding the wire ? Or some other material is required.
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2 votes
3 answers
6k views

Reflow oven vs even hot plate

I've recently been searching for a simple, easy yet cheap way to reflow SMDs on a PCB board as I have never tried it before and always wanted to create a small and compact circuit. I then found a ...
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1 vote
2 answers
883 views

cartridge heater control

I am interested in designing with cartridge heaters to implement a temperature control system, with a microcontroller sampling temperature sensors and controlling heating elements. I will probably aim ...
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2 votes
1 answer
4k views

What happens when a peltier fails?

I am trying to determine all possible failure cases for a heating application with a peltier. Most sources I find on the internet are looking at peltiers as a way of cooling CPUs, so I have heard ...
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2 votes
2 answers
1k views

Can conformal coating help against high-temperature environments if the chips heat up as well?

I have seen many claims of conformal coating helping for protection against, amongst many other things, extreme temperature. One such claim in here would be: Question regarding PCB coating My ...
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1 vote
1 answer
9k views

Relationship between current and temperature

I am trying to find the specific current needed to heat up a wire to a specific temperature. The wire material is kanthal. I've calculated the resistance, from the resistivty and the dimensions of the ...
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5 votes
1 answer
797 views

Better approach for maximizing Cooling Fan Life Expectancy

We are working on a product which is extremely cost sensitive. It generates a lot of heat so we are planning to use a heat sink. For those 'very rare edge causes' where heat sink alone cannot cool ...
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0 votes
1 answer
16k views

What calculations determine the choice of the overload relay trip class to protect a motor

I know that the motor trip current determines the choice of the trip class, but I do not know what are the range values for each one. Lets say that I have an engine with a trip current of 190. Somehow ...
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1 vote
1 answer
259 views

IC out of oven after baking

Is it ok to take out the ICs/components from oven immediately after baking hours? Or is there a standard cool down temperature before opening of the oven after baking?
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2 votes
1 answer
51 views

High Temperature Conductor in Air

I am trying to determine what the best material is for a high temperature conductor. It is for distributing power inside a furnace. I need to run at around 1000 celsius (the furnace is hotter but this ...
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0 votes
2 answers
396 views

PCB coating for a high temperature environment

What PCB coating is good for a high temperature environment (my environment is about 30-70 C), and is available in a spray can or so that is easy to implement without need of a device/machine?
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1 vote
2 answers
1k views

Overheating heating element

I'm making a system that is going to heat water in a 25 liter tank to a given temperature and keep the water on this temperature with a precision of +/-0.5 °C. As I have done some research I have ...
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0 votes
1 answer
117 views

Some help with 9V Longlife VARTA batteries?

I recently tried to make my own LED circuit to give some light to my room at night.I ended up with a circuit that goes like this: A 9V battery with clips goes to a SWITCH and from the switch to a ...
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1 vote
1 answer
793 views

L705CV Voltage Regulator Overheating [duplicate]

The L805CV voltage regulator is capable of producing a consistent 5v 1.5A draw. I am creating a small raspberry pi case and have a 12v 3a power supply to accomplish the project. I am powering a 12v ...
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2 votes
1 answer
562 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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  • 406
0 votes
3 answers
788 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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3 votes
1 answer
423 views

How much humidity can a microcontroller/embedded device withstand?

I'm working on a project that employs a microcontroller in an 80-85°F environment with quite a bit of humidity. It's going to be placed directly next to an array of fish tanks. Obviously, the water ...
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2 votes
3 answers
6k views

Do I need a heatsink for my voltage regulator?

I use L7805CV voltage regulator (TO-220) to get 5 V from a Li-Po 7.4 V 2200 mAh battery. However, after a while, voltage regulator gets really hot. Current measurement showed 200 mA. P=I*V=0.2*(7.4-...
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  • 629
2 votes
3 answers
1k views

Electronics in high temperature environments

I'm relatively (ok, very) new to electronics. I'm trying to find where to buy parts (or even just more information on what sort of materials I should be looking for) to build a circuit board with a ...
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