Questions tagged [overheat]

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Reason behind coil melting

Today I managed to melt the ignition coil of my RC engine. First let me describe my circuit, I have also created a diagram, however I could not find all the parts in the designer so I think some ...
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1answer
48 views

Boost converter Ic extremely heats up when trying to switch using Mosfet

In Case 1, the converter works fine but in the other case it heats up extremely. Tried same using a PNP nosfet and it heats up the same as soon as load is connected. 12v 1A router is used as a load ...
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2answers
99 views

My soldering station's iron is rated for 70W, can I modify a 75W one to work with it?

I have an Aoyue 936A soldering iron rated at 24V/70 watts. I came across a cheapo soldering iron rated at 24V/75W and rewired it according to the pinouts of the original one. The thermocouple readings ...
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1answer
130 views

Thin wire overheats, thick wire allows too much current to flow

I'm currently building a mini lathe to turn wood. I am using a 12v motor and I was experiencing some initial problems with the thin wires I was using; they overheated instantly. I then changed to 14 ...
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1answer
96 views

How to fix an overheating Arduino nano?

I have an Arduino Nano and when I power it either via USB or VIN it heats up very quickly. Before it started to overheat I heard a spark but didn't see which pin sparked and I think that's the problem....
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4answers
115 views

I'd like to know if I can push 40 volts at 3 amps through an IRLZ44N MOSFET?

I already have the datasheet, it states it can handle 50 volts at 50 amps but I'm worried about spikes since I'm using it to switch the primary side of the transformer at 70 Hz and it will be a square ...
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1answer
68 views

Reduce Overheating of an old Audio Video Receiver - Harman/Kardon 3500

Because good AVRs are super expensive, I got one cheaply from a friend. It works really decently, but recently it started to turn itself off after a while. With my technical background I looked into ...
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74 views

LM311 overheating

I breadboarded the circuited below. Within seconds of operation, both the L7805 and LM311 start to overheat very badly. I tought it had something to do with the coupling capacitor or the AC signal so ...
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0answers
60 views

MIC28515 overheating with high input voltage

I've designed this MIC28515 buck regulator based on the manufacturer schematic reference. I'm planning to run it at 70VIn I'm doing the tests with @ 5V 2A load Temp(Amb) = 20C. When I set a VIn of ...
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1answer
44 views

Can I run a 2xAAA battery device on a 5 volt USB device without the motor burning out?

Just wondering and I don't want to waste parts if it will just burn out if I have it plugged in too long.
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200 views

Can a voltage higher than 5V be applied to the 28BYJ-48 (5V) stepper motor?

I want to automate my roller blinds by using an ESP (NodeMCU) and I was thinking of using a stepper motor. I had a 28BYJ-48(5V) stepper motor laying around with the ULN2003 driver it came with. ...
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2answers
1k views

24 V transistor switch acting strangely

I am working on a project to switch a spring-applied brake (datasheet, page 84, MCNB 2GR) using a Teensy 3.5. I only have limited electronics knowledge and am struggling with weird behaviour from the ...
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1answer
80 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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2answers
643 views

UPDATE - How to prevent overheating of my ebike system?

I have a Li-ion battery pack 18650 cells with a BMS, 10 in series by 7 parallel. The pack I bought was defective from day one and had a 7 cell row that got hot when charging now I just repaired the ...
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1answer
224 views

P-Channel MOSFET high side switch in an MPPT buck converter gets very hot with no load

I am a novice working on an MPPT solar charge controller. Q5 mosfet (SUP53P06) gets very hot even when I have no load attached. The circuit is just like below except I have no current sensors in it ...
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2answers
100 views

Switching regulator overheating

I am using LM2576T as a regulator in my design. I made a circuit by the datasheet, but I haven't connected the diode (I haven't got any at the moment). Could it be a reason for switching regulator to ...
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0answers
91 views

What caused these crystals to grow on overheated PCB?

Source This is a picture of a screw terminal on a 3d printer mainboard that overheated or caught fire, likely due to a loose connection or overcurrent. One thing that caught my eye is the crystal ...
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76 views

Carry 2A over AWG28

I'm looking at a (relatively popular) slip ring which uses AWG28 wires and has a rated current of 2A/channel. However, this chart suggests that AWG28 is only capable of carrying 0.226A for power ...
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1answer
89 views

Overheat from voltage dividing circuit?

I want to create a circuit that is capable of delivering 1V, 3A from a 5V, 3A power supply. To do this im using a voltage dividing circuit with a 1k ohm resistor (r1) and 220ohm resistor (r2). The ...
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3answers
427 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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3answers
112 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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3answers
150 views

PCB female jack and power supply male melted

I've been working in my thesis project which consist on a PID controler to mantain a certain temperature in a case. The heater module is made of two 40W-12V 3D printer resistors and one 15W-10 Ohm ...
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1answer
75 views

Which power supply to use for Raspberry Pi? High voltage Low current (10V, 1A) or low voltage high current supply (5V, 2A)? why? [closed]

As far as the official specifications are concerned an rPi can be powered with supplies from 5V to 12 V. Typical current for 5V supply is 2A. Total power required for an rPi is 10W roughly. Raspberry ...
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0answers
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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5answers
134 views

Why is the linear voltage regulator going hot although within its specification?

I'm having an issue with my NCP718 voltage regulator overheating to the point of thermal shutdown. I have attached a photo of my schematic. I am inputing ~15-20v and outputting 4V from the reg. The ...
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4answers
329 views

Is exceeding Opamp Common Mode Voltage safe?

I understand that when you exceed an Opamps Common mode voltage limit that the output will no longer be reliable. And that this limit is often a bit less that the supply rails. But would slightly ...
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0answers
252 views

Overheating LM386

I am still trying to build a simple audio amplifier using the LM386. I also found some older LM386 in my department, since my previous batch may be corrupted. Using this circuit I rebuilt it using a ...
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1answer
139 views

Is a 12V voltage step-up USB to 4-Pin PC adapter safe to use in an enclosed space for extended periods of time? [closed]

I am interested in using an adapter cable such as this to power a 4-Pin fan through usb: The fan specifications are as follows: Now, my question is this - Is something like this safe to use for an ...
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4answers
596 views

MCP1700 voltage regulator instantly overheats and starts to smoke, no load

Newbie question. I have a MCP1700-3302E LDO voltage regulator to power ESP8266 using a 3.7V battery. However, as soon as I connect the negative lead to the ground pin and the positive to Vin the ...
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2answers
227 views

Why do the capacitors inside the inverter heat up?

I'm having a problem with the inverters of textile machinery. The machine I work with is the Rieter brand Ring machine and the main inverter, the part is defined as 75 kw U1. 12 units 2200 uf 400 volt ...
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1answer
110 views

Motors overheating with DRV8835

We have a problem with the DC motor driver DRV8835 that we have soldered to the black PCB attached below (4). Prior to this driver, we were using L293D h-bridges to run these DC motors and never ...
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1answer
380 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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3answers
117 views

Is it possible to desolder the bond wires by overheating a chip?

I was trying to solder some VQFN packaged chips for the first time using a hot air gun, because that's all I have. I set the temperature to rougly < 350°C and startet the process. Sometimes it ...
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2answers
1k views

pam8403 using low wattage speaker

I am using the output of usb sound card as an input to PAM8403 ic with specs from datasheet. However i am using 4 ohm 0.5 W speaker. So i have tried testing with that and it works but sometimes with ...
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1answer
469 views

LDO Heating Issue

I am working on a PCB project and having a problem with the linear regulator IC. I want to be able to maintain a relatively constant temperature for the heating element. The whole system is ...
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1answer
136 views

Is there anything that can be done about this U5215 universal motor? [closed]

Recently my hairdryer stopped working properly. While drying my hair, the fan would suddenly turn off after a minute or two (it seems as if a thermal switch in series with the motor cut the current to ...
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1answer
251 views

500V generation, MOSFET Heating Problem

Referring to my previous post. I have successfully generated 500V. The problem I am facing an issue. MOSFET I am using for switching is FQB34N20LTM. The MOSFET is burning badly. The snap of drain ...
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5answers
438 views

MOSFET is overheating when running on a 20A load

I'm trying to build a controllable switch for a heavy load (3D printer), controlled by a microcomputer. I don't want to use relay because of slowness, sound and durability. So I've built a switch ...
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0answers
123 views

Can a bad cell cause excessive heat in charging circuit?

Something I have noticed and am curious of. I had a cases where a lithium ion cell, is bad or dead and it seems to cause overheating in the IC chip on the charging circuit Today I was having issues ...
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1answer
1k views

What mosfet do I use in induction heater?

I have been building an induction heater based off this schematic. I have tried using irfp250m mosfets. Works like a charm. But whenever I put a too big piece of iron inside the coil, the mosfets soon ...
2
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1answer
359 views

Switching power supply toroidal heats more than 100ºC. Is it normal?

I’ve got this 48V 10.4A generic chinese switching power supply to power my mini lathe’s controller and stepper motors. The two steppers draw when working just 1.5A max each. And the controller 0.5A. ...
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4answers
41k views

Is it Safe to Plug an Extension Cord Into a Power Strip? [closed]

Just a bit of context, I am a technology enthusiast. I love everything from software to hardware, Windows to Linux, Computer to Phone, and everything in between. So, I wouldn't be surprised is my ...
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1answer
96 views

Heating issues with solar charging circuit

I am using the above circuit to charge a 7.4V Li-ion Battery.With input MPPT voltage set at 12V, I have applied 13V input voltage to the circuit. The battery is charging at 1.4A. (according to the ...
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1answer
189 views

Why do heaters vary widely in resistance even though they have similar power requirements?

I have a soldering station equipped with a 24V/60W soldering iron. Its heating element (pins 1-2) resistance measures around 50 ohms. The resistance of the thermocouple (pins 4-5) measures around 2 ...
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3answers
249 views

Microcontroller overheating when sensor is plugged in [closed]

I am building a board based around an STM32L051C6 microcontroller, which will measure a hall effect sensor (AH3362Q) and count the time in between the edges the sensor sees. The sensor is powered from ...
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4answers
416 views

Lithium ion battery charging problem [closed]

I am making a rechargeable led light My power source is mobile litium ion battery, (3.7)v 1800mah Whenever is use to chrge this battery with the mobile charger 5v... The diode in4007 connected to the ...
1
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1answer
255 views

THAT4315 audio analyzer - capacitors getting hot

I have designed a audio spectrum analyzer circuit with THAT4315 and a drivers for IN-13 bar graph nixie tube to visualize the signal level. To supply +-12V to the opamps, the Meanwell NSD15 module is ...
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1answer
216 views

Class-AB Amplifier Excessive Heat

I'm using a TI TPA6017A2 as a pre-amp for an in-car audio application and it's getting excessively hot, to the point where the IC burns my finger when touched if I set the input volume to max. Beyond ...
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1answer
519 views

LED light cycles on and off - Is it a heat or voltage problem?

I have this LED light that was over the aquarium at my work desk. There's a circuit board (not pictured) that controls when the lights go on and off but, after a power outage a few weeks ago, it seems ...
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1answer
2k views

MAX487CPA/SN75176BP RS485 IC gets too warm (in DMX Splitter circuit)

Brief I built part of the scheme below (input K2/IC5, optocoupler IC9 and output IC6/K3). IC9 is overheating when I connect LED pars to K3, because voltage is flowing back into pin 6/7. If I connect ...