I was recently inspired to make an ambient temperature meter because of an eBay ad that stated, “A temperature meter can be made from any appliance or item you can find online.”
The ad was written by the seller, who called himself “Voltmeter Ammonite” and claimed he had sold a “Temperature Meter” for $3,500 on eBay in 2009.
I’m glad to see someone has taken the time to write an ad like this, because it’s a great opportunity for DIYers to get their hands on some cheap electronics.
The seller didn’t provide any information about how to assemble the unit, so I decided to figure out how to make one myself.
The seller’s description says, “My Temperature Meter has a built in battery that will charge your phone, so it works great as a smart alarm clock.
It can even be used to detect when you are being disturbed.”
A little research revealed that this “temperature meter” would work well for a variety of tasks, including monitoring the temperature of the home’s air conditioner, adjusting the temperature in a fridge, and reading a person’s heart rate, breathing rate, and respiration.
While the seller’s ad does state that the temperature sensor is made of “plastic” and “plastisol” materials, that’s probably just the tip of the iceberg when it comes to what the seller is selling.
You can find more information on how to create an ambient meter from a variety for a number of different products on the EBay site, but I figured I’d share my method with you in case you decide to build your own.
The Parts ListBefore you begin, you’ll want to take a look at the parts list.
There’s a lot of different types of meters on eBay, and many of them have different specs and features.
For this tutorial, I’ll be using the temperature meter described by the listing.
It includes a 6-volt battery, an LED, and an LCD display that displays a reading.
In addition, the seller offers a “USB charging port” that can charge a device that supports a USB-C port.
A USB-to-USB cable is included with the unit.
When you’re ready to begin, open the package and remove the battery.
Once the battery is removed, you can use a fingernail to remove the sensor, or you can attach the LED from the battery as shown in the picture below.
Use a small screwdriver to turn the sensor into the proper position.
If you’re not sure where to position the LED, it’s easiest to use a pair of pliers to help you locate it.
After you’re sure the sensor is in the correct position, you need to attach the battery cover to the battery and slide it over the sensor.
Again, the battery will need to be removed, and you can remove the cover by carefully pulling it down.
Using your fingernails, you should be able to remove both the battery, and the sensor from the cover.
This part is where you’ll be able see the voltage, temperature, and humidity of the ambient temperature.
With the cover removed, the temperature and humidity readings should be displayed on the screen.
Now, hold the sensor up against the display and turn the temperature knob.
Press the knob to the desired temperature and press the button to stop the readings.
Turn the temperature down until you hear a click.
Then, press the knob back to the previous setting.
Replace the cover on the unit once the temperature is back to its original setting.
Now, open up the temperature monitor.
From here, you just need to turn on the ambient meter and wait for the readings to appear.
To test your readings, you will need a temperature meter that’s not the one described in the listing, or the one you bought in 2009 with a different rating.
Just remember to use the right type of temperature sensor for the task at hand.
Here’s what the ambient sensor will look like when you’re done: The temperature meter shown in this tutorial was made from a generic-sized 1/4″ glass piece.
As you can see, there are a few things that differentiate the ambient meters you’ll see in eBay auctions.
First off, you won’t find an LCD screen in the unit pictured.
Instead, the unit has a 2.5-inch LCD display.
That’s the same display used on many smart thermostats and other home electronics.
It can display both indoor and outdoor temperatures, along with a few other important information.
Additionally, the display can be turned on and off.
Another important detail that I found interesting about the unit is that it has two different LED colors.
Each color will flash on and on in