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Advice Needed on Temp Circuit

July 7, 2020, 9:17 pm
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Gotta say -

  • I like the spirit in that statement!

You will actually be using Thermocouples for this? I know what they are and have replaced them before, but I don’t know how they work electrically.

Your circuit looks overly complicated on the peltier/thermocouple side of things. I don’t know how, but I think it could be reduced and simplified…

I don’t know the LCD you are using, look into a common 16x2 LCD display.
https://www.adafruit.com/product/181
Uses quite a few pins on the UNO to use it, but it works and you are not using many pins.

The buck converter isn’t needed. A simple 5vdc voltage regulator will handle the job, with a couple of capacitors added in.

Anyway, that’s my 2 cents…

Randy

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Advice Needed on Temp Circuit

July 7, 2020, 9:31 pm
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Randy, Yes i’m going to be utilizing Type-K Thermocouples the engine i’m going to be monitoring is an Air Cooled VW Bus so the Cylinder Heads get up to around 400+ degrees F :-).

The wiring on the thermocouple side from what I understand is basically all daisy-chained together on GND, 5V, and Data.

The buck converter is again made to convert from a 12V Car battery being charged from an alternator so it’ll be more like 14V. I did think about using a good sized AC brick to run the Arduino but this seams like a better option in the long run (at least to me).

The Screen i’ve got is this https://www.sparkfun.com/products/14074 and here again from what I understand you can run it with only 4 wires (like i’ve got in the diagram).

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Picobuck for Fritzing

July 7, 2020, 10:32 pm
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I have been dowloading the part from fritzing and using the 7th button. I created this part myself. Should I dowload it as someting other than fzpz b/c that is what i have rn?

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Picobuck for Fritzing

July 7, 2020, 10:33 pm
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My other two parts uploaded successfully so I am confused as to why this one wont?

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Picobuck for Fritzing

July 7, 2020, 10:37 pm
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Now it’s fixed. Before all I was getting was a text statement for an upload, now it’s a link.

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Picobuck for Fritzing

July 8, 2020, 2:46 am
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There are pin alignment problem with that part…

Don’t know about the part, but looks like, the breadboard svg resized from the side, the ellipse holes are really irritating my eyes…!

And I think you only made the breadboard part, the other views are still a 8-pin IC…

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MakerFocus ESP32

July 8, 2020, 2:47 am
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PCB Star Heat Sink for LED

July 8, 2020, 3:46 am
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This part is already exist…
And please hold on… You are making mess…
You’ve to make schematic and PCB view also…

These are not “fritzing” parts, these are Parts’ Arts…!!

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Picobuck for Fritzing

July 8, 2020, 4:25 am
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Simple 12v Bulb Part?

July 8, 2020, 7:51 am
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Hi Im trying to educate my 9 yr son on electronics and bought and donated to the program …i cannot for the life of me find a Simple Simple low voltage bulb in the entire library ???. 12v bulb …not led Bulb. We have a bulb.

Please please, can you link to me to a little low voltage “Bulb” glass bulb style lamp. (you know the ones you use in school and have been around for 75yrs).

I fear after 2 hrs now of searching the internet and trying to find anything we have drawn a blank and really need some help in trying to find one …we are loosing inspiration and hope in the project now …and i don’t want the simplest thing to hold it all up and us both just give in.

Can you help ?

Many thanks

James

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Simple 12v Bulb Part?

July 8, 2020, 8:03 am
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Simple 12v Bulb Part?

July 8, 2020, 8:09 am
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Thank you for this link …we did find this …and we rejected it simply because its far too large and couldn’t find out how to re-size it within the software ?

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Simple 12v Bulb Part?

July 8, 2020, 9:57 am
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Advice Needed on Temp Circuit

July 8, 2020, 11:08 am
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FYI

• There are many 4-wire SPI & i2c LCD’s for $10+
• The text in the ref to your Sparkfun LCD says its a 4-line display but your graphic shows 2-line display.
• Thermocouples and Thermistors are not the same device and use different coding and hookup but, good to know about both thus, a more informed choice of which to use for particular application.
• They are Resistance devices and if wanting to use serial connections… well, look into it… Trouble…
• Though fun and graphically nice, a Fritzing Part of the temperature sensor is not needed. Simply use a pinheader part with appropriate number of pins.

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Advice Needed on Temp Circuit

July 8, 2020, 11:29 am
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The two line LCD display on the drawing vs the four line is due to limitations on finding correct parts inside of the software. The two-line has the same pinout (I think) as the four line so that’s why I used it. When I built this the first time I didn’t know about the pinheader part and never went back to correct that (until now). But other than that does anyone see any issues with how it’s wired? :smiley:
CHT Type IV Mk-VIIII_bb|690x463

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Tactile Switch Sparkfun 5x12.5mm

July 8, 2020, 12:08 pm
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@just_randy - thanks so much! You are right - this will totally work (PCB dimensions are correct!)

Key lessons for me

  1. key to search for the right term (I’d always used switch which meant this was much more hidden)
  2. the breadboard view is slightly different (it has the green board (I guess through hole/PTH) but the PCB dimensions are correct (only 2 of the holes are connected, but that will work ;-))

Really appreciate your help,
Best,
Narath

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Advice Needed on Temp Circuit

July 8, 2020, 12:18 pm
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Simple 12v Bulb Part?

July 8, 2020, 2:54 pm
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Amazing !!! - Fantastic ! Thats great thanks for that. - we are now under way again and building our circuit. - It is really appreciated Old_Grey ! I know that somewhere in the world there are good folks like you who literally holding up humanity by small acts of kindness . :smiley:

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Particle Argon, Boron, Xenon (3rd gen / mesh) devices

July 8, 2020, 4:25 pm
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No problem! I created these for my class. They were the first Fritzing parts I made and someone commented on the forum the size might be slightly off. If that’s the case and anyone ever wants to modify them, that would be most welcome. Here is the repo

I’m not as familiar with the B Series SoM, but I believe they are based on the same technology / microcontroller as the Boron but in a different form factor; I think the SoM plugs into another device.

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Api-ms-win-crt-runtime-l1-1-0.dll Fix?

July 8, 2020, 4:39 pm
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I have the same problem (W7 SP1 64b).
I won’t buy it.

Software is too dependent on system updates. That’s the wrong way.

What to try something other than Microsoft Visual?
Bye bye.

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