Questions tagged [overheat]

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3 votes
1 answer
122 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 ...
2 votes
0 answers
91 views

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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8 votes
5 answers
735 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 ...
0 votes
1 answer
53 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 ...
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0 votes
1 answer
44 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, ...
0 votes
2 answers
96 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 ...
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4 votes
2 answers
777 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 ...
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0 votes
1 answer
57 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 ...
0 votes
1 answer
127 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 ...
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0 votes
0 answers
62 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 ...
0 votes
1 answer
112 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 ...
0 votes
1 answer
171 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 ...
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0 votes
1 answer
70 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 ...
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1 vote
3 answers
334 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 ...
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0 votes
2 answers
150 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 ...
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0 votes
0 answers
74 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 ...
0 votes
1 answer
101 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 ...
1 vote
2 answers
180 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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0 votes
1 answer
71 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....
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3 votes
4 answers
2k 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 ...
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0 votes
1 answer
323 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 ...
0 votes
1 answer
242 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....
0 votes
1 answer
172 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-...
0 votes
4 answers
120 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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0 votes
1 answer
133 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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0 votes
0 answers
98 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 ...
1 vote
0 answers
73 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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0 votes
1 answer
48 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.
0 votes
0 answers
568 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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7 votes
2 answers
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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1 vote
2 answers
117 views

BLDC 3phase motor. The resistor 5W 0.1 ohm to ground very hot when motor working at 250Hz

Any one help me on this my issuse. I have a BLDC 3 phase motor controler similar to this Schem here encloses. When the motor working at 150Hz everything is ok. But if it is works at 250Hz then the ...
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0 votes
1 answer
109 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
2 answers
1k 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
1 answer
353 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
2 answers
163 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
0 answers
107 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
0 answers
100 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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-1 votes
1 answer
121 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 ...
user avatar
4 votes
3 answers
450 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
2 answers
813 views

LTC3780 DC-DC 5-32V converter: sudden fault and overheating

I have planned to build a variable voltage DC power supply based on the LTC3780 DC-DC 5-32V converter. I guess you are familiar with the converter, but I am attaching and image for illustration: I ...
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1 vote
3 answers
122 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
3 answers
320 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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0 votes
1 answer
410 views

12V lighted rocker switch getting hot even without load

Is it normal that 12v lighted rocker switches get hot even when the load is not connected? Attached is the schematic and the PCB layout for such switch: https://lcsc.com/product-detail/Rocker-...
0 votes
1 answer
131 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
0 answers
34 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
5 answers
203 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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0 votes
4 answers
561 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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0 votes
0 answers
408 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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0 votes
1 answer
168 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
4 answers
755 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 ...