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Transfer function of a heating system
I wanted to design a small temperature-regulated DC heater for the sake of educational purposes in the field of control theory.The idea is to heat up a resistive element through a buck converter of...
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Thermal conductivity of 1600W/m·K?
I am comparing different thermal conductivities in the market and found that the thermal conductivity goes up to 1600W/m·K for a thermal sheet, but a thermal paste is still 0.65 W/m·K.Does it make a...
View ArticleUnderstanding semiconductor thermal resistance
Most datasheets I read through have a thermal resistance rating attached to the particular package the semiconductor comes in (i.e. TO-220, D2PAK, TO-3P, etc), usually in the form of θJA...
View ArticleWays to thermally manage a small enclosure
I'm working on a project to measure the efficiency of a mono-crystalline solar cell based on the temperature in an enclosure.The solar cell is 150x130 mm and the enclosure will match that size and be a...
View ArticleIs there a fluctuation effect between heat, resistance and current?
We are told that heat increases a resistor's resistance (or decreases its conductance) and current decreases when resistance is increased.So with less current, less heat would be dissipated, which...
View ArticleCan you run wires to an inductive heating coil or will that be a bad idea and...
I have an inductive heating circuit that runs at around 5A at 24V (I'm estimating here). Is it possible to place the inductive heating coil a distance away from the circuit and connect the circuit to...
View ArticleCan I simply add a 240V Neutral to SONOFF TH10 when replacing wall thermostat
So, I have purchased a SONOFF TH10 wanting to use it to replace my wall mounted thermostat.The thermostat has 2 connections: Always-Live and Switched-Live (which is activated of course by the position...
View ArticleHow much power is dissipated as heat in a 12V MR16 Led Bulb
I just installed a dimmer for a set of (non-dimmable) MR16 bulbs wired in parallel. The dimmer sits between a 12V power supply and the bulbs. My observation when trying to dim the non-dimmable bulbs is...
View ArticleIs there a general rule to calculate heat dissipation of electronic equipment?
Is there a general rule for calculating heat dissipation in electronic equipment if it's not listed in the specs?I have a couple of projects coming I'm working on that require this. For one situation I...
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Is my wiring for this 5 m 2812B LED strip correct?
I'm building one of these infinity mirror cubes:I have some questions regarding the wiring.This is what I came up with:Green is data, black is ground and red is 5 V power. Every strip has 18 (not 25...
View ArticleHow is the correct surface load of a heating element determined and verified?
A heating element should be operated below its maximum surface load (power per surface area). For a given element, one might be tempted to say the surface load is the power given by Ohm's law divided...
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Can a W1209 be run with 5 V DC only?
I would like to control a small heat pad using a W1209, using a power bank that provides 5 V. My circuit is working if I connect the step-up voltage controller to the power bank and increase its...
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Changing wattage of a heat pad
I'm working on setting up a heater bed for my 3D printer, and looking for some help / sanity check on adjusting the heater input. I've got a Kat's automotive heater pad (150 W, 4" x 5") attached to an...
View ArticleWhy didn't 10GBASE-T Ethernet replace 1000BASE-T? [closed]
1000BASE-T (gigabit Ethernet over copper twisted pair) seems to have largely replaced 100BASE-T (100-megabit Ethernet over the same medium) in new equipment. However, 10GBASE-T (10-gigabit Ethernet...
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ENC28J60 heating issues
Here, I add the schematic and PCB layout of ENC28J60 module. It's working properly, but it's getting too hot. It's around 103 Degree Fahrenheit. How can I minimize this heating issues?
View ArticleTrying to heat up 32-gauge nicrome wire
I was trying to heat up a nicrome wire (32gauge) using a 21650 lithium battery, and I have charged it. I have used jumper wires to connect all and joined the nicrome using wire connecting joint. The...
View ArticleClone 862D+ soldering iron heating element
I purchased an ebay 862D+ rework station in 2017 and it has worked great. Recently I broke the ceramic on the heating element but did not break the element itself so I was able to get ohm readings from...
View ArticleDesigning a growing box using a resistance wire as a heating element
I'm trying to design a growing box that will maintain a stable temperature for the seeds germination.I'm planning to use an Arduino with a temperature sensor to control a heating element. I'm thinking...
View ArticleMaximize heat from a 12 V, 100 W solar panel and 26 AWG nichrome wire
I am heating a nonconducting material. The power source is connected directly to 12 guage copper wire. One 30 inch strand of 26 AWG nichrome 80 wire runs between the copper wire posts.Since sunlight...
View ArticleHeat dissipation from PCB
I have a PCB with several power ICs. The PCB is connected to an aluminium plate as a heatsink on the back of the PCB.How can I measure how much heat dissipates from the top of the PCB to the air and...
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PID control of a reversible Peltier (using Arduino PID_V2 library)
I have a box of water, which temperature I have to regulate to a ramping setpoint which could go both below and above the ambient temperature. So I have decided to use a Peltier for both cooling and...
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Why does the valve symbol have a Clase symbol,or short-circyit symbol before...
Could anyone explain to me why the valve symbol have a shortcircuit symbol or termination symbol before the earth???
View ArticleWhy is Joule heating (or electric power) proportional to current squared?...
I know, that the formula P = R·I2 is derived from the formula of electric power and Ohm's Law, but the intuition behind why the current is exactly squared here is unclear to me.I get that the more...
View ArticleHow can I warm lithium-ion batteries from a solar panel?
I have a solar-powered system with a 12 V LiFePO4 battery which will need to operate in -20 to 60 °C conditions. I have a charge controller with a temperature sensor which will disable charging below 0...
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Controlling a kiln with PID and old magnetic contactor
I have retrofitted an old 240V/16A kiln with a controller consisting of an INKBIRD ITC-100VH, a FOTEK SSR-40 and K-type thermocouple in line with VegOilGuy's...
View ArticleCooling fan direction
I am building a temperature controller. The controller is built in a metal rack mount chassis. The components inside the controller generally consist of ACDC power supplies, an arduino and small signal...
View ArticleGeneric thermal resistance values for a heatsink
I am building a linear power supply, and I would like to know roughly how big my heatsinks need to be. Is there a rule of thumb for the thermal resistance of a heatsink given its dimensions and...
View ArticleTransformer voltage step-up and heat
A step-up transformer turns a lower alternating voltage to a higher one, while stepping down the current. This is due to the conservation of energy (energy to into the first coil must equal to the...
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Can't get 12V PTC heating element to work
Please bear with me as I am a complete beginner. I am planning on using a PTC heating element in a project. Here is the link to the one I bought on Ebay: Aluminium enclosed 12V 80W PTC Heater/Heating...
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Electric heating pad voltage issue with STC1000
I have bought an electric heating pad from Adafruit. It works fine if I connect both legs to a power supply directly.However, I would need to connect it to a temperature controller (STC1000) for my own...
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