Peltier Coolers or Thermal Electric Coolers are used to make things hot or cold but have another cool use. Apply a heat source to one side and keep the other side cool and the Peltier generates electricity.
The transistor is the fundamental building block of modern electronic devices, it is a semiconductor device used to amplify and switch electronic signals.
More simply a transistor is a valve for electricity. In this video I demonstrate the two types of transistors (NPN and PNP) and explain their uses.
Here are the two symbols [...]
A Breadboard is a must for the electronics experimenter type of person for experimenting activities. It is made up of rows of pins that you can simply press in components and wires and they will be held in by pressure.
A diode is a one way valve for electricity or current flow.
Here is some information regarding the numbers you may find on a diode.
First Letter
A potentiometer is a variable resistor used to resist electrical current.
Think of a potentiometer as a water valve, only for electricity, most of the same principals exist. For instance if you crack a valve open and get the desired flow, and the water pressure increases or the valve gets [...]
Photocells, (LDR) Light Dependent Resistor, Photo Resistor, Cadium Sulfide Cell (CdS), all of these names refer to the same thing. Photo Cells are semiconductors that are also resistors that change their resistance depending on the amount of light.
I decided it would be easier to explain AC and DC current if the user already knew how to use and oscilloscope. Explaining how to use an oscilloscope is easy if the user already knows what DC and AC current is. I think the video worked out as a fast paced tutorial for both subjects.
[...]
An LED or Light Emitting Diode is a low power semiconductor light source used in lots of electronic devices. LEDs are closeley related to transistors and regular diodes.
A diode is a semiconductor that only allows current to flow in one direction, it is a one way valve for electricity.
Diodes come in all shapes and sizes, the most important difference in them is the current rating, i.e. how much you can push through without overheating and burning the diode up. Here [...]
A Resistor “resists” current flow. Think of it as a restriction or a water valve that is stuck in a single position but not for water but for for current flow or electricity.
Resistors in action.
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