Questions tagged [temperature]

Temperature is a property of a substance related to the amount of heat energy it contains.

Filter by
Sorted by
Tagged with
0
votes
0answers
40 views

How to protect PCB from high room temperature? [closed]

I have a generator voltage regulator circuit. While operating the generator at FLA = 400A the output of the regulator circuit decreased about 2 volts. This drop in the output regulated voltage happens ...
0
votes
0answers
34 views

How to simultaneously measure temperature at different depths?

I need to simultaneously measure the temperature of a fluid at different depths. I only have a 10mm diameter access port set at 90 degrees which seems to suggest a 'flexible', cable like solution. ...
0
votes
2answers
35 views

Can RF power measurement be done using a temperature probe?

Can RF power (at HF frequencies in the range of 0 to 40 dBm into a 50 Ohm load) be measured by a thermometer or other temperature measurement device on the termination load? If so, what kind of ...
0
votes
0answers
50 views

Why am I getting such widely ranging values from this tmp36 in this circuit?

Background I have the following circuit built on breadboard at this time. I'm powering it off Computer USB and a 5V 2Amp wall wart (via USB) in to the Nano Every (which is located on the breadboard -- ...
0
votes
1answer
23 views

How to compute for mosfet temperature under load

I would like to know at what temperature will be my mosfet be sitting at under 100% load. The mosfet is DMT3006LPS. So assuming a given load of 5A, and is being driven by its rated Rdson(max) - 6 ...
1
vote
2answers
113 views

How can I get a logic output from a temperature sensor?

I need a logic high or logic low output from an LM35. If the temperature exceeds the preset temperature threshold, the logic level output will be generated from the LM35. The preset temperature ...
1
vote
0answers
30 views

Battery charging / discharging in a very challenging temperature environment

I'm searching for a solution to charge and discharge a battery pack. The current idea is to use 18650 cells, with 4 or 6 cells (~25-60 Wh) in series. The outside environment I'm dealing with can be ...
0
votes
0answers
67 views

Why is a relay controlling a roller shutter constantly at ~50°C?

I have several Shelly 2.5 controllers for my roller shutters. They work great but I noticed that the temperature they report is stable around 50°C. When reading relevant forums, it seems that nobody ...
0
votes
2answers
50 views

Putting LED near incadescent light source on lava lamp

I am currently trying to modify a traditional lava lamp, to change the colour of light it emits, by placing an LED strip somewhere around the body, so it also lights the inside of the lamp. My lava ...
3
votes
4answers
89 views

Calculate temperature for low side switches?

I would like to know how to calculate the temperature (to see if I am still in a working range) for a low side switch. Hope you can help me there. I need to control 10 valves(12/24V - 500mA max. ea.) -...
0
votes
0answers
39 views

LabVIEW outputting incorrect temperature value from TMP36

I connected my TMP36 to my Arduino UNO to A0 and I'm observing the temperature output from LabVIEW. Unfortunately, LabVIEW is giving me an incorrect temperature, with constant readings of around 40°C. ...
0
votes
1answer
46 views

Temperature compensation equation?

I'm looking for the correct temperature compensation equation to use on our project. We are measuring the output of a detector who's signal is very sensitive to temperature drift. Any external ...
0
votes
3answers
72 views

Using Lithium-ion Battery at -40 Celsius?

Is it possible to use a 18650 cell Lithium-ion battery down to -40 Celsius, discharge only? There would be no charging at this temperature (I've read that causes damage to the cell). Curious if ...
0
votes
0answers
18 views

MAX31865 Over Voltage/Under Voltage Fault Caused by Noisy Environment

I have 4 MAX31865 RTD temperature sensor IC's using 3 wire PT100 sensors in an electrically noisy environment. I used an isolated DC-DC converter (SPBW03F-03) in hopes to isolate the measurement ...
0
votes
0answers
62 views

Which is more robust against temperature cycles, solder or wire wrap?

When connecting a bunch of components in something that will be subject to repeated heating and cooling, are soldered joints likely to be more or less robust than wire wrap? Intuitively, it feels like ...
0
votes
2answers
44 views

Inappropriate readings of pulse and temperature sensor (LM35)

I am facing quite a bit trouble with an LM25 temperature sensor. The readings are a bit too high (90-120*C) for room temprature. I have tried thefollowing things to get an expected result but none ...
0
votes
1answer
25 views

Multidrop system using DS18B20

As per the datasheet, to use Multidrop system, I have to match for the ROM address of the slave device, and then issue the READ ROM [0x33]command. But as per my understanding its a static process, i.e....
1
vote
2answers
44 views

How to Find the Thermal Resistance Junction to Ambient

I have this BUK9M12-60E MOSFET. I have calculated the maximum power dissipation of the MOSFET to be 14W (Conduction loss, Switching Loss and Gate Loss). I believe that I don't require any heatsink. I'...
0
votes
2answers
44 views

Efficient temperature control for a growbox

I am making a growbox controller. It has (among other things) a heater and a temperature sensor. Heater has no temperature controls, it can be turned on/off. The objective is to maintain temperature ...
1
vote
0answers
39 views

How can I turn off a MOSFET when the temperature rises?

I am using a MOSFET as a pre-regulator. When the voltage is too high, the temperature of the MOSFET is getting too high. (Even if I take 15 mA current.) As a safety precaution, if the junction ...
1
vote
3answers
47 views

What is the difference between “Storage Temp”, “Ambient Temp” and “Operating Temp” mean?

To my understanding, ambient temperature is the temperature of the surrounding area while the unit being worked on is powered. While operating temperature is the temperature of the unit itself under ...
0
votes
1answer
115 views

12V 4-pin Noctua NF-A8 on Raspberry Pi 4B

I am using a 12V 4-pin Noctua NF-A8 fan https://noctua.at/en/nf-a8-pwm and want to use the PWM functionality also read the rpm from it. Firstly, I went over dozens of forum discussions on a 5V 4-pin ...
1
vote
3answers
34 views

Fine-tuning/calibrating DS18b20 thermometer via 1-wire

I am trying to enable remote reading of the temperature gauges in my furnace room by adding DS18B20 thermometers. Since I had some Raspberry Pis and DS18B20s, and ...
0
votes
1answer
36 views

How does series parallel combination of LEDs affect the temperature rise?

I was designing the LED light of 200 W with LED combination of 9 series / 8 parallel, each LED is 6V thus total output voltage is 56V. I am using Meanwell xlg 200 W driver. But this resulted in high ...
2
votes
2answers
41 views

Multiplex temperature signals through one conditioning circuit

I'm planning on designing a PCB that takes numerous analog temperature sensor input signals and convert them using an Analog to Digital Converter (ADC) to be read by a computer. The signals need to go ...
8
votes
5answers
766 views

Is it normal to have this much fluctuation in an RTD measurment in boiling liquid?

I'm using a MAX31865 RTD measurement IC, and a standard PT100 RTD to measure maple syrup temperature as it's boiling (219 degF). At ambient, the temperature measurement is reasonably stable. But, ...
36
votes
12answers
8k views

How to make electronic systems which work below −40°C (−40°F)?

I notice on a lot of electronic products that most of them work down to −40°C. Glaring example with Microchip microprocessors page: https://www.microchip.com/ParamChartSearch/chart.aspx?branchID=1012 (...
0
votes
2answers
43 views

Calculating chip junction temperature based on case temperature

As far as I know one can calculate a chip’s (Diode, Transistor..) junction temperature rise with the consumed power and the thermal resistance Rth. Is there a way to calculate the junction ...
0
votes
2answers
99 views

Raspberry Pico and DHT11 not working C/C++

This is my Wiring here + is connected to 3v3, - to GND and OUT to pin28 I'm using this ...
0
votes
3answers
103 views

How can you connect multiple monitors to one temperature sensor?

I have two monitors I want to connect to one temperature sensor. I tried connecting the sensor wires in parallel but it only outputs error. Sometimes the power doesn't even turn on. I'm guessing the ...
-1
votes
2answers
75 views

Surface temperature of a load resistor

How can I calculate the surface temperature of a load resistor? I'm given requirements that I may need a 1W 500 ohm resistor. During test fixture or product debugging the resistor is almost always is ...
0
votes
1answer
106 views

Could a PC consume more power from the plug if it oparates in a colder enviroment?

I have a mining rig (computer using its processing power to calculate hashes in order to eventually be rewarded with cryptocurrency tokens.) The program I use to mine tells me each time the power ...
5
votes
5answers
808 views

Hard temperatures rises for a MOSFET

I'm a mechanical engineer and a high school teacher that is about to start mechatronics and electronics. I've built this simple circuit that has the purpose to switching on and off a 12 V / 25 W lamp ...
0
votes
3answers
156 views

Zener diode as temperature sensor

I am trying to measure the temperature of a battery pack using Zener diodes. I want to use Energus's Tiny BMS 30A. In their battery modules they use Zener diodes to measure the temperature of the pack ...
0
votes
2answers
33 views

Low Temperatures Effect on RTC module

How would low temperatures effect the following RTC module? I'm talking around -20 degrees Celsius. It can be seen on the picture that it uses the DS1307N version, which is industrial (-40 to 80 ...
1
vote
2answers
114 views

Heating up a nichrome wire, MOSFET got too hot

I'm trying to get a 37 AWG, 0.6mm diameter nichrome wire to reach 300*C so it can heat up inside of an enclosure and according to its datasheet that requires 5A, I cut out enough nichrome wire to ...
0
votes
2answers
83 views

What low cost LCD can I use in minus -30°C? [closed]

I'm looking for an low cost LCD I can use that can still operate even if they it's exposed by -30°C. Normally, the 1602 LCDs have a minimum operation limit at 0°C. So I cannot use that ... or can I?
1
vote
0answers
77 views

Temperature rise in the inductor?

I have a customized inductor which is of E70 core. I would like to calculate the temperature rise in the inductor. Ac copper loss= 5W, DC copper loss 2.5W, core loss 8W (according to steinmetz). I ...
0
votes
1answer
27 views

What is a gel battery rated to temperature wise?

I have a battery (in this case a car battery, but there's other types of batteries also made of gel), and was wondering what they were rated to so the charge is still there for when it's used?
0
votes
0answers
43 views

How do I calculate the temperature rise in the ferrite core?

This question might seem basic but I would like to state it. I would like to calculate the operating/Rise temperature of the ferrite core of an inductor. I am modelling my own bobbins for the core so ...
0
votes
0answers
36 views

Temperature rising for inductors

I have an U type inductor. I'd like to calculate temperature rising on the inductor. I found a formula but the result was approximatly 350-550 celcius, I think that is not possible. Here my formula: $$...
0
votes
0answers
69 views

I made a temperature controller - the PID works but the heater still doesn't work

The setpoint doesn't affect the output voltage to heater. How can I fix my circuit so current goes through to the heater?
2
votes
4answers
75 views

How to regulate temperature of an IC/PCB -in a vacuum

I have to regulate the temp of an IC. (70deg. C) The part will be in a vacuum chamber. Electrical connections can pass in-out of the vacuum chamber through a port (plenty of connections available.) I ...
0
votes
1answer
41 views

pt100 RTD transmitters not working - two in a row - am I doing something wrong?

I just tried to use two different ones of these RTD transmitters with a pt100 probe (3 wire) with no success. I am connecting the transmitter directly to a 4-20mA input on a PLC, as shown in the ...
0
votes
1answer
62 views

Thermador oven circuit board troubleshooting - where to go from here?

I have a Thermador double oven unit that is not working correctly in one of its cooking modes. I have done some troubleshooting, but haven’t located the problem to my satisfaction. I wanted to see if ...
0
votes
2answers
108 views

Derivation of formula for temperature coefficient of resistance

https://www.electrical4u.com/temperature-coefficient-of-resistance/ Referring to this article, I'd like to compile two key formulas for the temperature coefficient of resistance. First is the formula ...
0
votes
1answer
42 views

What is the meaning of inferred absolute zero temperature? Why does the resistance temperature graph it is obtained from behave that way?

Studying basic direct current circuits, I've come across the term inferred absolute zero temperature on computation of resistances that change due to temperature. Based on my readings, I understand it ...
0
votes
1answer
43 views

How can I calculate the worst-case Tj of a MOSFET in discontinuous operation at another Tamb?

I am faced with the task to calculate the maximum junction temperature of a MOSFET in a half-bridge, having conduction losses, switching losses and diode losses. The real difficulty comes from the ...
0
votes
1answer
60 views

PID controller for a very wide temperature range (∆T=190°C)

I'm designing temperature control system based on Peltier elements. And it's needed to work on a very wide temperature range - from below zero to more than 100°C. So there is two work modes - cooling ...
0
votes
2answers
116 views

Temperature control fails. Will a PID solve the problem?

I made a temperature control system without PID (just on/off with an offset) to control the temperature in a tank. I can only cool the tank with a cooling coil inside the tank (so there is no heating ...

1
2 3 4 5
18