The Peltier effect is a reversible physical process which is exploited in Peltier cooler/heater. The flow of current through this device pumps heat from one plate of the device to the other. This can be used to both heat and cool electronic components.

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Cooling an Insulated Chamber using Thermoelectric Cooler

I have a stainless steel cylinder containing some liquid that has to be cooled downw to 5 C. To achieve this, I'm thinking of making an small insulated box (6" x 6" x 10") with a thermoelectric cooler ...
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68 views

PWM driven bipolar DC motor controller filtered with LC for a peltier element

I want to control peltier element's temperature with a PWM driven bipolar DC motor controller to be able to switch between heating and cooling and also control the level of it. The peltier element is ...
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51 views

Using a Thermoelectric Cooler

I have recently stumbled across thermoelectric coolers, it is my understanding that when they are powered one side will get colder and the other side will get hotter. Also that the more power supplied ...
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Convert body heat to light [closed]

What thermoelectric device would I use to power one white LED generated by the body heat of one square centimeter skin on a hand. That is, I wish to power one white LED from the heat generated by one ...
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2answers
130 views

How to power a 12V6A peltier device with a 14.4V battery?

How to power a 12V6A peltier device with a 14.4V battery. My son is working on a school science project and unfortunately I have very little knowledge on electrical engineering. Please be patient ...
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64 views

Quick and dirty power supply for 127~240VAC to 25A@12V or 5A@60V, or other approach

I am thinking of a Emergency Beer Can Chiller made of up to five 5A@12VDC Thermoelectric peltier cooler plates like this one, one on top of another. I need either 25A at 12V (5 plates in parallel) 5A ...
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66 views

Minimum voltage input for thermoelectric unit

Context: I am trying to make a drink cooler with a thermoelectric unit (peltier unit). I want to supply the minimum amount of energy as possible to the peltier unit. Now on my peltier unit, it says ...
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2answers
66 views

Trying to understand Peltier module specification

I baught this module The specifcation says: ...
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201 views

H-bridge/buck converter with negative and positive voltage range

as already questioned here, i am still working on peltier controllers. For that I am using a stepper motor driver (h-bridge) with a low-pass LC filter and the peltier element behind, as Olin Lathrop ...
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1answer
55 views

How is the heat lost in a peltier distributed?

I'm looking at peltier elements to heat my project. I seem to find that most are about 5% efficient, but how is the 95% turned into heat distributed? Does the cold side get 47.5% and the warm side ...
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2answers
525 views

Are peltier elements polarized?

I'm looking to add a peltier element to one of my projects. However, I want to sometimes heat and sometimes cool, depending on the ambient temperatures on both sides of the element. Image ...
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722 views

PWM control of Peltier with Arduino+Thermistor [duplicate]

I currently have this setup and would like to add automatic control over the PWM based on a thermistor reading. Any insights?
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2answers
142 views

Peltier with Mosfet - Heat Issues and Alternatives

I'm interested in using a Peltier device in conjunction with arduino as a precise temperature controller. I've followed the example below and have switched out batteries with a 12v power supply. After ...
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1answer
125 views

Reverse current with Peltier (TEC)

Trying to control a Peltier to cool and to heat. Does the following code allow me to reverse the current to switch cooling/heating depending on whether I input "a" or "z"? Source: ...
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2answers
133 views

Diode rectification on a device

I have a Peltier (TEC) module, with diodes in series with each lead. (see image below) I'm not quite sure what the specs are for the diode, but it says 130 on one line and SB560 on another, so I ...
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1answer
222 views

Could I create Peltier cooling module from iron and copper?

I want to create a tiny, easy to maintain one-purpose distilation unit. It's supposed to distilate expensive tetrachlorethylene to clean it from whatever is dissolved in it. There are millions of ...
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3answers
843 views

Calculating the output power of Thermoelectric generator

This question is related with my previous question here I am trying to calculate the output power from a specific TEG, here is it specifications, Open Circuit voltage (Voc) = 5.29V Current (I) = ...
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1answer
115 views

Drive power supply straight to Peltier (TEC)

Can I clip the output wires of a 12V power supply to the wires on a Peltier (TEC) module? http://www.customthermoelectric.com/tecs/pdf/00711-5L31-03CA_spec_sht.pdf
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Thermistor control of peltier voltage with Arduino (for DSLR chill box project)

I am mildly familiar with electronics, mostly from playing around with electronics kits as a kid. That was a long time ago, though, maybe as much as 20 years ago. I am currently working on a cold or ...
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1k views

Peltier heat resistor temperature controller, schematic issue

I've been having a problem with the following schematic: What I need to do: Two temperature controllers in order to create a temperature gradient. The hot side is a a little above room temperature ...
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152 views

Temperature differentials and efficiency at thermoelectric generator (TEG)

I'm trying to use TEGs to power some low power electronics. So, if there is a positive temperature differential between the hot side and the cold side, I should be able to get a positive voltage. What ...
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2answers
958 views

Considerations for solar powered thermoelectric cooler with fan

I am building a food cooler for camping this summer. My plan is to build a thermoelectric cooler that is solar powered. My cooler is looking much like this: including a CPU fan on the hot side ...
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1answer
95 views

Thermoelectric cooled Avalanche Photodiode sensor PCB

I'm designing a small PCB (max 5x5 cm) to bias and readout from an Avalanche Photodiode. Since the APD response varies greatly with the temperature, I want to use a cheap 12706 TEC together with a ...
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Why peltier elements have smaller heatsink on cold side?

I have seen in nearly all configurations that Peltier elements are mounted with huge heat sinks on hot side as compared to tiny ones on small side. Is this just a way of explaining the need of heat ...
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65 views

Should same sized peltier elements be cascaded?

I learned that peltier elements give better cooling on cascading but need to be growing in size towards the hot side. I have 4 peltier elements of 40×40×35mm and I am planning to make a portable ...
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2answers
126 views

Heat Sink for portable refrigerator

I am thinking of making a portable refrigerator with the above schematics, but I am doubtful that the aluminium frame would be enough of a Heat Sink on it's own. All the peltier elements are of ...
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139 views

Arduino connecting multiple GPIO pins to one voltage line

So basically, I want to connect a small Peltier cell to an Arduino. I know that Peltiers are very inefficient and require large amounts of power in general but I only need to create a small ...
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65 views

Driving TEC below rated voltage

Can a TEC driving IC such as the MAX1979 rated for TEC voltages up to 6V be used to control a 12V TEC - can TEC work under their rated voltage, with the amount of heat moved controlled by current, or ...
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2answers
116 views

Fast thermal ramp up/ power efficiency [closed]

I want to build a controlled temperature well in an alumminum block, and right now I am in doub as to what heating method choose. I am mostly torn between a high power resistor such as this or ...
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50 views

Multistage peltier with single stage modules [duplicate]

Am I right to assume that two simple single stage peltier modules, such as the ones easily found on eBay, connected in series and placed on top of each other, have performance similar to a 2-stage ...
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1answer
542 views

Selecting best Heat Sink for TEG (Thermoelectric generator)

I am trying to solve a puzzle about selecting the right heat sink for my TEG, but I am really confused and lost with lots of equations. Here is the Specification of my TEG (TG12-2.5-01L) Module ...
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2answers
109 views

Relay max current

I'm building a magnetic stirrer. I wanted to add a heated bed and I've been looking at peltiers as a heat source. To control the temperature I've identified the "WH7016K", a Chinese-made temperature ...
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1answer
364 views

What happens when you connect hot and cold sides of Peltier device together?

I would like to know how the Peltier device would act if you heat sink the hot side WITH the cold side. Would it just sit there and consume power? I need something to consume ~15 watts or more at ...
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200 views

Feasability of thermoelectric hot/cold blanket or mattress pad?

I want to prototype a thermoelectric based mattress pad like this: where the center of the body is cooled, while the head and feet are warmed. the diagram is a side view and not to scale. The ...
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96 views

Is it okay to rapidly switch on and off a DC adapter

I have a thermoelectric coller I've converted to a heater which I usually use a normal thermostat to control. I've just upgraded to a PID-based controller which of course is going to be switching ...
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131 views

How to determine the maximum voltage and current ratings of a peltier element?

I recently bought a peltier with no ratings. None at all. On hindsight, it was probably not the smartest thing to do, but is there any way I can determine the maximum voltge and current values at ...
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3answers
682 views

Peltier Unit Not Working

Recently I ordered a Peltier unit online and received it yesterday. Naturally, I was very excited to play with it. When I first turned it on, One side got hot, an another very cold. I had read that I ...
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2answers
705 views

Micro rectangular heating element for thin layer heating

The purpose The main goal is creating a little hand-held device that would heat a thin film (locally) to \$50-70°C\$ by sliding over it. The film area is \$<150cm^2\$. A secondary goal would be ...
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4answers
524 views

Can Peltier devices be cascaded?

Can Peltier devices be cascaded to create a bigger temperature difference? Like mounting one on top of anther one to increase the maximum difference from 60 degrees C to 120 degrees.
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1answer
251 views

PWM LED dimmer as TE driver

Would it be possible to use a standard 12V DC LED dimmer together with a thermoelectric element to control the temperature? I'm talking about a very simple application with no need of fine tuning. ...
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1answer
516 views

how to drive peltier cooler pad at home?

I purchased an peltier cooler plate (90W maximum, but it could work at different power) like the model shown in this link http://pcbheaven.com/wikipages/The_Peltier_Thermo-Element/ . It has a wide ...
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2answers
194 views

Are there cryogenic peltiers [closed]

I was wondering if there is such a thing as a cryogenic peltier cooler, are there any that are available on the consumer market not just in high-tech labs. The reason that I ask is because liquid ...
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1answer
873 views

Peltier generators series vs parallel

If you are using peltiers as generators do you get double the voltage if you connect two in series, and double the ampage if you connect two in parallel?
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thermoelectric problem

A two-stage thermoelectric cooling system is to be designed to maintain a small insulated chamber at 0°F when ambient temperature is 90°F. You may assume a cold-plate temperature of –15°F, ...
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6answers
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Building a safe low-temperature heat box : heat sources

I'm not sure if this is more of a physics or electronics question, but here goes: I use a heatbox with a temperature in the range of 80-100F for warming wax (for sculpture modeling). My current ...
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1answer
1k views

What is the standard way to make a Peltier power supply with variable power? [duplicate]

Possible Duplicate: How to drive a Peltier element? I want to control a few Peltier using MCU. I think the easiest way is using PWM, but I feel that the efficiency is very low and It maybe ...
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1answer
925 views

Powering a 30 watt peltier heatpump

I've got a Peltier element rated at 12V / 2.5A (30W), but I'd like some clarification on how I should power it. I'm familiar with building power supplies with LM78xx linear regulators, and I've had a ...
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3answers
17k views

How to drive a Peltier element?

Maybe the underlying question is what the Voltage-Current curve looks like. Can I drive it from a voltage source (like you drive a heater) or from a current source (like you drive an LED)? Or even ...
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1answer
922 views

TEG in series require power balancer/align adapter?

Do Thermoelectric Generators (TEG) in series require a power balancer, when storing the energy to a battery source? If not, what should I do for my design to distribute to a battery source more ...
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1answer
3k views

Thermocouple array for generating free electrical energy?

Thermocouple is a material (junction between two different metals) which generates potential difference in terms of millivolts, isn't it? Why don't we create a matrix of thermocouples (many ...