Questions tagged [overheat]
The overheat tag has no usage guidance.
122 questions
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How can I mark PTFE wires used at high temperatures under vacuum?
In our cryostat and high temperature (~200--250°C) setups, I use PTFE-insulated wires (compared to PVC it can take higher temperatures and outgasses less). In sensible quantities the range of colours ...
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1
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Why is this soldering iron red hot in the middle section?
As you can see in the picture, my soldering iron is red hot in the lower middle section. I'm confused.
Why is it happening?
This hasn't happened while using other soldering irons.
- 101
0
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1
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NMOS MOSFET with VGS of 20V getting too hot on PWM of 700Hz
There are three identical circuits connected in parallel to the source each with a PWM source received an STM board, when powering on the 24V source my mosfet gets really hot, but only with a high ...
3
votes
1
answer
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Stepper motor stutters when connected to a TB6612 stepper motor driver and a Raspberry Pi
I've wired a stepper motor to a TB6612 stepper motor driver which is in turn connected to a Raspberry Pi. The wiring is as follows.
VM ---> +12V power supply (the adapter used for this can supply ...
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1
vote
1
answer
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Power Supply Design and Heating issue of NodeMcu v1.0 ESP-12E
I have a problem in powering the Nodemcu v1.0 ESP-12E using 9v-1Amp DC external power supply and 7805 voltage regulator(which has heat sink).
I am doing a project using Nodemcu v1.0 ESP-12E. Nodemcu ...
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1
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1
answer
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How might pagers be made to explode at a controllable moment? [closed]
There was this news about exploding pagers - I could not believe it at first.
But now, that it is confirmed, I add my guess as an electronics engineer, how it could work - can someone confirm this ...
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0
votes
1
answer
68
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Voltage Controlled High Current Source Mosfet selection
I am working on adjustable VCCS targeting 2 to 3A to my 0.5 ohm load.
According to my schematic:
I am controlling the current size through my load (H1, 0.5 ohm) by using DAC function of my MCU. ...
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4
votes
2
answers
530
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Arduino Board Getting Too Hot: Need Help Diagnosing Issue (Schematic Provided)
I’m encountering an issue where one of my Arduino boards, specifically “Arduino 1” in the schematic attached below, is getting very hot shortly after powering up. I’m concerned that something in my ...
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1
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2
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Why are my relays heating? [closed]
I am using an ESP32 development kit with a 5V eight relay block. Following this answer, I removed jumper JD-VCC and powered the relay block at the JD-VCC pins from an external 5V 2A adaptor. The ...
- 1,193
2
votes
1
answer
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High-side n-mosfets overheating in a brushless motor H-bridge
This H bridge (one leg shown only) drives a three phase brushless motor (each winding is 80mOhm and 38mH). Supply is 16V and total average current consuption 1.3A. The motor is spinning fine. ...
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1
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3
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MOSFET Heatsink?
I'm new to electronics, and have just discovered that MOSFET's need heatsinks to stop them blowing out (you'd think they would have mentioned this at uni?).
I'm using a RFD16N016LE (datasheet: https://...
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1
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1
answer
201
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Why are the IGBTs of a full bridge inverter of an ultrasonic generator getting hot even at low current (1 A)?
I designed an inverter to use an ultrasonic generator for an ultrasonic homogenizer.
The problem is that even at low current, the switches get abnormally hot(specially two of them Q3 and Q4):
...
0
votes
4
answers
171
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Overloading wirewound resistors
I need to add some wirewound resistor in series with a voltmeter to make it high range. I am converting the voltmeter from 300 V FSD to 900 V FSD.
As per my calculation the wattage should be 20 W, but ...
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0
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Why is my NEMA 14 stepper motor overheating when idle?
TLDR: motor overheats >200 degF and I don't know why.
I have a NEMA 14 stepper motor (14 N-cm) driven by an A4988. The logic is controlled by an ESP-32 WROOM MCU, and the motor is powered by a 24-V ...
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1
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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 ...
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4
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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 ...
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2
answers
331
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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 ...
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1
vote
1
answer
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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 ...
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4
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1
answer
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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.
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0
answers
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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 ...
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0
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1
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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 ...
- 3,156
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2
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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 ...
1
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2
answers
128
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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 ...
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0
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231
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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 ...
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4
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2k
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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 ...
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4
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3
answers
503
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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.
...
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3
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0
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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. ...
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2
answers
863
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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 ...
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18
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1
answer
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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 ...
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0
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2
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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 ...
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4
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635
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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 ...
0
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3
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134
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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 ...
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1
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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. ...
- 1,193
0
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2
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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 ...
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5
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1
answer
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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 ...
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6
answers
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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, ...
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2
answers
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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 ...
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1
answer
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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 ...
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0
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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 ...
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1
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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 ...
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3
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1
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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 ...
user320546
2
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0
answers
287
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White residue on circuit board
What is this white powder on my induction cooker hob? Is is metal salt? The capacitor recently melted
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5
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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 ...
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0
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1
answer
107
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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 ...
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0
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1
answer
426
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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, ...
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2
answers
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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 ...
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2
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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 ...
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1
answer
130
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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 ...
0
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1
answer
643
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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 ...
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0
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111
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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 ...
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