Questions tagged [overheat]
The overheat tag has no usage guidance.
45
questions
7
votes
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 ...
0
votes
1answer
38 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 ...
1
vote
2answers
62 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 ...
1
vote
1answer
71 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 ...
0
votes
2answers
38 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 ...
0
votes
0answers
82 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 ...
0
votes
0answers
59 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 ...
-1
votes
1answer
49 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 ...
4
votes
3answers
403 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 ...
1
vote
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.
0
votes
3answers
50 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 ...
0
votes
1answer
54 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 ...
0
votes
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 ...
0
votes
5answers
99 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 ...
0
votes
4answers
158 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 ...
0
votes
0answers
111 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 ...
0
votes
1answer
34 views
Choose Extension Lead [closed]
I am trying to understand better the characteristics I need to look at when choosing an extension lead (i.e. an extension cord that plugs into a socket, and gives me multiple sockets on the other end)....
0
votes
1answer
69 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 ...
1
vote
4answers
299 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 ...
1
vote
2answers
150 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 ...
1
vote
1answer
86 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 ...
0
votes
1answer
214 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 ...
0
votes
3answers
71 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 ...
0
votes
1answer
623 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 ...
1
vote
1answer
219 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 ...
0
votes
1answer
89 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 ...
2
votes
1answer
206 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 ...
0
votes
5answers
296 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 ...
0
votes
0answers
46 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 ...
2
votes
1answer
748 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
votes
1answer
125 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.
...
8
votes
4answers
22k 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 ...
1
vote
1answer
78 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 ...
1
vote
1answer
88 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 ...
1
vote
3answers
201 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 ...
-3
votes
4answers
271 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
vote
1answer
211 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 ...
0
votes
1answer
168 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 ...
0
votes
1answer
245 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 ...
1
vote
1answer
1k 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 ...
0
votes
3answers
236 views
What can happen with the PCB foil while SMD resistor destructive overheat?
I need to protect the gate driving circuit by putting the resistor between the gate and the control circuit:
During the testing of the mockup MOSFETs can go be destroyed which leaded to high voltage ...
0
votes
4answers
628 views
Overheating of LM1117 SOT223, 5v-3.3v
I'm having problems with my design. I put the schematic here, maybe someone can find an error that I didn't find yet.
EDITED[I forgot the schematic, sorry...]
The microcontroller, dsPIC, has the ...
6
votes
5answers
4k views
Why are DIMMs not equipped with a heat sink like a CPU?
I know that a DIMM is composed of a set of chips that contain control logic managing the decode and prefetching memory operations. According to a product specification, I found that newer RAM works at ...
4
votes
3answers
4k views
DIY Induction Heater failure - MOSFET overheat
I saw this video about DIY Induction Heater and I decided to make it by myself in order to learn something from this project.
After finish wiring everything, I connect the power supply and heard/saw ...
14
votes
3answers
2k views
LM2586 - Inductor Heats Then Burns
I'm designing a step-up constant current source to drive LED strips (nominal load voltage is about 54 VDC). Requirements:
Vin: 18..32 VDC
Iout = 0.2 A
Vout = 54 VDC (nominal) - 57 VDC (maximum)
...
