DevHeads IoT Integration Server

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DevHeads IoT Integration Server

The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.

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techielew
techielew
View on Discord
9/8/2023

Design Engineer Needed! Peltier Cooler Design Help!

I’m new to Peltier modules, heatsinks, CPU fans, and thermoelectrics. I need help figuring out how to efficiently match those components together. I’ve been more of a mechanical designer rather than an electro-tech designer. I am designing an Aeroponic system and I need a way to cool my nutrient reservoir. My goal is to bring the temperature of a 3-5 gallon water container down from 85 degrees Fahrenheit to 50 degrees Fahrenheit. Here’s the link to the design I'm trying to base my design off: http://www.novatecproducts.com/iceprobe.htm The diameter of the probe is 1-1/4”. I thought about doing a simple cooling plate but couldn’t seal it against a cooler or plastic container as well as I could a bulkhead style probe fitting. They don’t sell probes like that and no one else makes anything close to that kind of thermal transfer probe so I had to make one. I couldn’t find an aluminum bolt or all-thread in 1-1/4” diameter so I got a piece of 1-1/4” aluminum round bar and threaded one end to fit a flat aluminum flange and got an aluminum flat lock nut to seal it against the wall of the container. I plan to use the aluminum flange of the probe as the thermal face that will contact the cold side of the Peltier module and transfer the cold temp down the probe and into the water. The flange is a 4-1/2” diameter circle so I want to find a Peltier chip that will fit under it nicely and be as cooling efficient as it can be. I need to cool a 3-5 gallon container from 85 degrees Fahrenheit to 50 degrees Fahrenheit but it’s going to have a controller so if the chip can cool more than that, it would be preferred because I might change the size of my reservoir and I want it to be strong enough to cool a larger size water tank or insulated box. If the module is able to cool it more than what I’m needing, the controller won’t have to run it as long, which would mean less power draw. I could use those huge Heatsinks with two and three fans with pipes that looks like a hot rod engine, but since the Peltier device will be sitting on the side of the water tank, the heatsink can’t be very heavy or stick out very far. So I need to match the Peltier module with a heatsink and CPU fan that will effectively cool the Peltier module that I’m looking for. I was thinking about using a heatsink like this: https://www.google.com/shopping/product/886015867783779298?q=efficient+cpu+heatsink&client=safari&hl=en-us&biw=414&bih=719&tbs=vw:l,ss:44&prmd=sivn&sxsrf=ALeKk02wST30IOo2hK7zmStKgUnU86Q0dQ:1593026927993&prds=epd:11304467210571878547,cdl:1,prmr:1,cs:1...
techielew
techielew
View on Discord
9/7/2023

Bluetooth design help

I need some help with design with Bluetooth. We are building a new design and adding another Bluetooth feature. Classic / Simple Bluetooth with analog audio. See attached image. Package:Standard package, SMD...
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techielew
techielew
View on Discord
9/7/2023

Seeking Collabs Guidelines

#seeking-collabs is the DevHeads version of "help wanted". It's also the heart of the DevHeads community, where you can share ongoing projects and seek assistance from other DevHeads with complementary skillsets to push your design across the finish line. Make sure to describe your project in enough detail to help other DevHeads self-identify as collab candidates! Once you've found a good match for your project, feel free to move the conversation into a private chat, take advantage of one of our voice or video channels, or request access to a breakout room on our community meeting platform from one of our @Mod or @Admin roles. Also let a @Mod or @Admin know if you've found a match so we can close the thread....
techielew
techielew
View on Discord
9/2/2023

Help designing a power supply

I need to create a power supply that will accept 12V DC and output 5V DC All devices to be through hole. I have a 811-2195-5-ND which is a 3.3V supply and so I’d need the same thing in 5V if I use it. However, it’s pretty pricey as I need to create 10 of these. I have a commercial board that uses a JQ6500 board and provides the wanted specs. I wonder if I can duplicate it for my purposes. It uses a bridge rectifier to protect against reverse connections on the 12V side. Next, it uses a LT7806CV for a regulator. That’s it for the commercial board. Is there a good reason to use other components for my application?...
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