Questions tagged [heat-protection]

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1answer
46 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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3answers
53 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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3answers
137 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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3answers
76 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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1answer
64 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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1answer
31 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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1answer
43 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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1answer
40 views

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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3answers
111 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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0answers
32 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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0answers
57 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 ...
2
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2answers
75 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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1answer
147 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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1answer
316 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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1answer
430 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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1answer
65 views

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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9answers
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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3answers
126 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 ...
2
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2answers
285 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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0answers
63 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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2answers
223 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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1answer
182 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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3answers
3k 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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1answer
57 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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1answer
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 ...
1
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1answer
632 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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3answers
5k 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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2answers
754 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 ...
2
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1answer
3k 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 ...
2
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2answers
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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1answer
8k 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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1answer
741 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 ...
0
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1answer
15k 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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1answer
219 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?
2
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1answer
49 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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2answers
337 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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2answers
926 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 ...
0
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1answer
103 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 ...
1
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1answer
756 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 ...
2
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1answer
518 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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3answers
753 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 ...
3
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1answer
372 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 ...
2
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3answers
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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3answers
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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2answers
3k views

Warming PCB in a low temperature environment

I have to develop a microcontroller circuit that will run at low temperatures (as low as -60C). I want to heat the FR4 PCB board until it reaches the commercial temperature range above -40C. I found ...
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3answers
3k views

How is “Overtemperature shutdown/protection” implemented for ICs?

IC data sheets often give some informations about the circuits over-temperature protection. Lets take a Microchip LDO (MCP1702) for example: "...If the power dissipation within the LDO is excessive, ...
3
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4answers
26k views

Voltage regulator too hot to touch [duplicate]

I'm working on an RGB LED project. I'm using this as the power supply: https://www.sparkfun.com/products/114 It uses an LM317 which according to the data sheet can supply up to 1.5A. The LED's I'm ...
2
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1answer
467 views

Wireless water level sensor, in sump. Installation best-practices for longivity

My wireless water-level sensor is working fine, and when deployed in the sump-well, it is giving me periodic readings quite well. At this stage, I have the circuit still on a breadboard, and now plan ...
1
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1answer
289 views

PCB Board design for H-Bridge TLE5206

I would like to make PCB board for TLE 5206-2G (check the datasheet). It is TO263 package. Basically, what i dont know is how to transfer heat out of the IC. I saw few PCB's that has little copper ...
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2answers
5k views

How can I prevent a 556 timer IC from becoming very hot?

I built the circuit described in a previous question/answer which I will repost here: It's been running quite well, actuating the solenoid at regular intervals as designed. The TIP122 transistor is ...