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Questions tagged [overheat]

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Is it better to shut down an overheated laptop? [closed]

My brother and I were sitting beside a laptop. He was playing a game and we noticed the laptop was overheating. My opinion was to turn it off ASAP to prevent "Thermal runaway" and other ...
Michael George's user avatar
3 votes
4 answers
858 views

Op-amp (LM348N) becomes very hot when connected to power

Is it normal for an op-amp to become very hot immediately when I connect its power pins? Nothing else is connected yet, just +5 V to the VCC+ and GND to VCC- pins. I never used an op-amp before, just ...
Denatural's user avatar
  • 153
3 votes
2 answers
310 views

Why the LED heats up and fails to pass the controlling information further?

Intro I'm designing my own macro keyboard with 3x5 rows of RGB-LED backlit buttons and two encoders. I use SK6812 (WS-2812B-like) mini RGB LEDs to backlight the buttons. TL;DR After turning on the ...
Spook's user avatar
  • 199
1 vote
1 answer
78 views

LM3478 MOSFET and inductors overheating

I'm trying to design a SEPIC converter based on LM3478, with input voltage range 12-36 V, and output 24 V 2 A. I'm calculated all relevant values of components, according to "AN-1484 Designing A ...
Ihor's user avatar
  • 13
4 votes
1 answer
697 views

Why is my Peltier module hot on both sides?

I've bought a TEC-12706 and used a 12V battery. I attached heatsinks and fans on both sides. The two sides get very hot as soon as I apply electricity to it.
Sam's user avatar
  • 49
1 vote
0 answers
62 views

AD8279 op amp randomly gets hot but keeps working

We use the AD8279 to measure battery cell voltages in a pack with 4 cells in series. We use the part in gain = 1/2 to get the four cell voltages down to a range we can put into our micro. Each cell is ...
JHerman's user avatar
  • 11
0 votes
1 answer
47 views

What is the criteria to choose between PTC thermistor and resettable fuse (PPTC)?

Wiki states: (PPTC) are similar in function to PTC thermistors in certain situations but operate on mechanical changes instead of charge carrier effects in semiconductors. Another wiki says there is ...
Dynamic_equilibrium's user avatar
0 votes
2 answers
54 views

Can I tap the hot wire leading to stove hood vent fan to power a low current LED warning bulb by mean of induction?

I cannot hear the hood vent fan running and I waste a lot of electricity. I know about lighted fan switches but they are not always found in every stove hood. Mine has no lighted fan switch. I use the ...
user359859's user avatar
1 vote
2 answers
103 views

How do I run four 1 watt 3.4 volt LEDs with a 5 volt 2 ampere power supply without overheating?

I am trying to run four small, 1 watt LEDs with the help of a charger that supplies 5 volts at 2 amperes current. The LEDs require 3.4 volts to run. How do I run them without the LEDs overheating? I ...
UjanRoy's user avatar
  • 11
0 votes
0 answers
157 views

Why does one MOSFET heat up very fast compared to the other MOSFET in this induction heater circuit?

simulate this circuit – Schematic created using CircuitLab I'll start off by saying this project is just an experiment I'm playing around with and is not the typical ZVS design you find ...
DanZ's user avatar
  • 131
0 votes
4 answers
570 views

Is touching a neutral wire safe?

Yeah, I know, it is such an old question, so many discussions on this topic, but I cannot realy find an exact answer in the Internet. I live in Ukraine, where we have 230V AC outlets, as in most ...
Gog's user avatar
  • 33
4 votes
3 answers
359 views

LM311 - all the ones I bought seem to be shorted internally. Am I making a mistake?

This schematic was created for an FSAE prototype car, in order to be used to detect if HV is present. It's called the TSAL (Tractive System Active Light), and I based most of the design from YouTube. ...
BHU1 LORD's user avatar
  • 103
3 votes
0 answers
178 views

Nixie Clock with Raspberry Pi Pico

I am trying to make a multifunctional nixie clock controlled with 2 Raspberry Pi Picos. Because of my mistake I can't plug every IN-12Bs into sockets. So I can only test a maximum of 4 at a time. ...
JohnSH's user avatar
  • 31
8 votes
2 answers
803 views

Entire FPGA getting hot evenly, not just a single hot spot

I have a board with an Altera EPF10K30RC240-4N that is not functioning at all. There is a high current draw on the board. The +5V rail is only 2.6V and there is 4.2 ohms between +5V and GND. The board ...
jfriend's user avatar
  • 507
18 votes
1 answer
2k views

Entire Perimeter of FPGA Getting Hot - Why?

I have a commercially-produced board with an Altera EPF10K30-series FPGA. There is an abnormally high current draw on the board. Where +5V should be present, there is only +2.6V. When comparing ...
jfriend's user avatar
  • 507
0 votes
2 answers
260 views

Why is the power adapter external (not built in) to the monitor? [closed]

I am considering to tape this dangling box to the back of my PC monitor for easier manipulation - I carry the screen up and down every day. However, my intuition has raised a red flag. Perhaps there ...
Martin Drozdik's user avatar
0 votes
4 answers
390 views

Why is the LM7812 getting hot in this circuit?

I have made this circuit. It works fine with normal Zener diode, however when I replaced it with the LM7812 it works fine but as time passes the regulator keeps getting very hot although the load is ...
Hazardous Voltage's user avatar
0 votes
3 answers
96 views

18650 parallel power bank cooks the furthest batteries

Against my better judgement I bought one of these 18650 power banks (see image). The reviews didn't disclose any issues and this sort of tech is so common now I never really thought much of it. It ...
Ben's user avatar
  • 1
0 votes
1 answer
286 views

MAX3232 ESE+ Not Working but ST3232C and MAX3232 Working on same PCB

I have designed a pcb for Rs232 to TTL, UART converter for using ESP32. I will control an LCD with ESP32. Some IC's (MAX3232 ESE+) heating at the first start. and not working just heating and heating. ...
mehmet's user avatar
  • 1,139
0 votes
2 answers
112 views

Transformer design problem

I will try my best because my English is not the best. Thanks! I'm designing a transformer for a PCB that I made. The circuit in the PCB accepts 5 V to 20 V in. So the transformer that I made is for ...
samuel mattio's user avatar
5 votes
1 answer
526 views

Voltage regulator LMR33630 doesn't work, asking for circuit review

I've put LMR33630ADDAR voltage regulator into a PCB with this circuit: It's slightly different from the example from datasheet: PG isn't connected, CFF capacitor absent and feedback resistors are ...
brigadir's user avatar
  • 271
7 votes
6 answers
2k views

Is this food box safe for electronics?

I want to organize some components and wiring for power distribution for a small solar panel. Voltages up to about 24 VDC, and currents up to about 3 amps. Components inside will include switches, ...
Boann's user avatar
  • 410
2 votes
2 answers
506 views

How can I connect two motors in parallel with different RPM and voltage?

I have a kid's electric toy car with a 12 V battery and 2 DC motors (Model: RS380/6 V & 12 V with 15000 RPM) connected to battery in parallel and to wheels using gearboxes. For some reason, the 6 ...
Zain's user avatar
  • 423
1 vote
1 answer
308 views

H-bridge: Low-side N-channel MOSFET burns occasionally

I am just getting into electronics and my first project is a 555 timer PWM (0-100) and an H-bridge to drive a motor for my brewing equipment (500 mA max. rating). Here is the setup: I have a 12 V ...
hAndyman's user avatar
0 votes
0 answers
226 views

ZVS induction heater gets really hot diodes

I'm an embedded software developer and am trying to up my electronics and board design knowledge. As a good first exercise I made a ZVS induction heater. project link Once assembled I was happy to see ...
Geoxion's user avatar
  • 394
0 votes
1 answer
59 views

How to calculate break down amperage of wire based on length, resistivity, and cross sectional area?

For this question, I'm assuming the current is continuous, the shape of the wire is cylindrical, and the air is STP air. (I bridged a fuse with a piece of soldering wire, and I'd like to be stupid in ...
Emmanuel Lopez's user avatar
3 votes
1 answer
160 views

MOSFETs overheating at higher voltages

I don't have problems working with low voltages like 12V, but when I started working with higher voltages using MOSFETs, I ran into problems with MOSFETs overheating. I tried anything that came to ...
user avatar
2 votes
0 answers
224 views

White residue on circuit board

What is this white powder on my induction cooker hob? Is is metal salt? The capacitor recently melted
DBM's user avatar
  • 21
8 votes
5 answers
1k views

MOSFET overheating and voltage drop

I've searched on the network for days but couldn't find a solution to my problem I hope you can help me. I want to create a DC motor speed regulator using IRFZ46N as a power MOSFET and a 10k ...
minghierid's user avatar
0 votes
1 answer
93 views

LM1117 5 V regulator and 2 servos

I just started my first PCB and I have a question. I want to use two servos (SG90s) and a 5 V regulator powered from a 7.4 V battery. After all my calculations the temperature that is dissipated is ...
GMW's user avatar
  • 1
0 votes
1 answer
318 views

L7805CV operating temperature

I have an L7805CV powering an Arduino and a serial communication chip from a 12 V supply. Nothing else is powered by the L7805CV as the LED strip is powered via a TIP120 transistor and 12 V. However, ...
Maciej Swic's user avatar
0 votes
2 answers
1k views

Maximum output voltage for a buck converter with IR2110 as its driver

I'm currently making a buck converter (rated output of 60V/10A) with IR2110 as its high side NMOS driver. The driver and buck converter circuit can be seen in fig 1 and 2. I've asked a bit on this ...
Kevin's user avatar
  • 101
4 votes
2 answers
2k views

Can I make a homemade Peltier module with constantan wire?

I'm trying to make my own Peltier module. I ordered constantan wire, which I used as N-type semiconductor and iron wire as P-type. I made this and powered it with 3V, but without response. What am I ...
PO12's user avatar
  • 67
0 votes
1 answer
122 views

BLDC motor and bullet connectors getting hot

I am using the following components: Lemon RC 3S-2200mAh 25C/ 50C (burst) LiPo battery Readytosky 80A ESC DYS D2726-6 BLDC (2200kV BLDC motor) I am testing out the components with 1045 (10 in, 4.5 ...
Keshav Totla's user avatar
0 votes
1 answer
463 views

Reflow soldering with temperature-sensitive components and without a reflow oven

I need to assemble and test a rather large (40x30 cm) board with single sided SMD parts, Sn Ag Cu solder (officially 217°C melting point). Usually I place group after group of components and locally ...
tobalt's user avatar
  • 22.2k
0 votes
0 answers
93 views

When running a wireless charging circuit, my power supply whines and the transistor gets super hot even though everything works, is anything wrong?

I created a wireless LED power circuit to drive adafruit wireless LEDs.The circuit works great, LEDs are fully lit but my desktop power supply lets out an awful whine whenever its running (it normally ...
Connor M's user avatar
-1 votes
1 answer
472 views

Transformer overheating issue

I have been using a 500 VA step down transformer, whose primary voltage is 2 phase 415 V and secondary voltage is 230 V. The issue is that the windings are getting overheated, without being overloaded ...
ltpriyank's user avatar
0 votes
1 answer
673 views

L9110 motor driver burning after some random time

I did a quick prototype of a plotter (two motors for x and y axes, one servo for the pen up/down). I'm using a L9110 module (dual H bridge board) to control the x and y motors. The power supply for ...
Sandro's user avatar
  • 7,367
0 votes
1 answer
176 views

Why is my FOD3180 getting hot until it dies?

I've built a circuit that helps me translate TTL pluses coming from an rotary encoder into HTL pulses needed for another device. I use a FOD3180 to get a push-pull output and a SFH6206-3T that allows ...
Bouni's user avatar
  • 55
1 vote
3 answers
689 views

ESP8266/ESP-12F gets damaged when powered by LDO (LD1117v33) every time

Every time I connect a new ESP8266 (ESP-12F) to a new LD1117v33, as long as I insert an ammeter in between, it runs fine. It consumes about 70mA during normal running, and almost 0mA when in deep ...
mo FEAR's user avatar
  • 264
0 votes
2 answers
383 views

IMU ST LSM6DSL getting boiling hot (i2c)

So I designed this custom PCB with a ESP32 and an IMU ST LSM6DSL over i2c. Everything is running at 3.3V. However, when I initialise the IMU in the firmware and start reading it in normal mode at ...
coriv's user avatar
  • 81
0 votes
0 answers
152 views

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 ...
Yanick Salzmann's user avatar
0 votes
1 answer
323 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 ...
Rojan Bhattarai's user avatar
1 vote
2 answers
582 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 ...
user148298's user avatar
  • 2,367
0 votes
1 answer
435 views

Potentiometer sizing

I have a 12vdc on automobile trying to install potentiometer for an 7amp cooling fan. I would like to control the the speed. I've purchased a a 2watt 100ohm potentiometer and it's running hot to touch....
Wes 's user avatar
  • 1
3 votes
4 answers
4k views

PWM motor control, MOSFET getting very hot

I have problem driving a high current DC motor (RS-775 24V-12V 80W), the MOSFET getting very hot when I use PWM signal. I'm using Raspberry Pi 3 b+ to generate PWM signal at (pin 8) which connected to ...
0ussama's user avatar
  • 121
0 votes
1 answer
1k 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 ...
import_hill's user avatar
0 votes
1 answer
659 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....
Enes Doğan's user avatar
0 votes
1 answer
525 views

ESP12F (ESP8266): every program runs okay but it's warm/hot

I have an ESP12F that I programmed with USB-TTL from the Arduino IDE. The wire setup when a program is running: USB->ESP12F RX->TX TX->RX 3V3->VCC GND->GND While on GPIOs of ESP12F: RST-...
Muhammad Ikhwan Perwira's user avatar
0 votes
4 answers
166 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 ...
BELSmith's user avatar
  • 146