Hi guys, welcome to Electrical Projects Channel
in today’s video I am going to show you how to make simple DIY heater,
you can use it for an office chair, or for your bed, or where you want
I just want to share this simple Idea with you
For building this device you need a LAN cable, and a 5 volts and 3 amperes or more, power supply
I am going to use my old PC Power Supply.
So let’s start building
first you need get rid of the insulation, we need only the wires.
The idea of such device is very simple,
when an electric current passing through a wire, electrical energy transforms into heat energy
Now I am going to connect all wires sequentially
you can just connect them, but, better solder them,
because if these connections will have a bad contact, they'll become very hot
Now let's solder them
perfect...
For insulation I am going to use some thermal shrinking tubing
Okay…
Now let’s connect on the other side
Like this...
now let's solder them
and thermal shrinking for the insulation
perfect...
Now all of the wires from the LAN cable connected sequentially
and we’re ready connect them to the power supply
We need to connect them to red and black wires
these wires provide us with 5 Volts DC
But there is one more problem, I am not sure that I have correct length of the wires,
and it is very important
because if you use less wire than needed, current will be too high, and the wires became too hot
so I am going to use an ampere meter for measuring and check that everything ok
My target current would be around 2 amperes, which gives me around 10 watts of heat
Now I need to start this power supply without PC, to do so I need to connect Green and black wires
Now the Power supply works
Here we have current 1.5 Amperes
and with this current the wires are slightly warm,
and maybe it enough, it depends on what you needs
Feel free to experiment, just don’t make current too high,
I don’t recommend increasing current higher than 3 amperes
Now, let’s solder the wires, and we are ready for testing.
For testing I am going to use an electrical thermometer
Sensor of the thermometer is touching the wire
as you can see the temperature is increasing, but not very much.
So after that I decided to make a little experiment
I made the wires shorter
I made the wires shorter, and after that the current increased from 1.5 to 2.5 Amperes,
well, let’s see how it affected the temperature
As you can see, now the temperature increasing much faster and the wires are much hotter
For better spreading of the heat you can put a layer of aluminum foil, and a layer of cloth
For the safety you must connect 4 or 5 ampere fuse sequentially
Never leave this device unattended when it is on and working
That is all that I wanted to show you, thanks for watching, and subscribe to my channel