Making a Simple Electrical Circuit

A circuit is essentially a closed path which electrons flow along.  A basic circuit needs to contain a power source (usually a battery), wires, and a resistor (often a light bulb).  In a circuit, electrons flow from the battery down the wires and into the light bulb.  When the bulb receives enough of the electrons, it will light up.

When choosing your light bulb, make sure you pick one which will work alongside the power level of your battery.  You can make it really easy by using a battery snap with the wires pre attached.

Link up the battery to the wires and then to the bulb.  If there are any breaks in the circuit, your bulb will not light up.  It is important to make sure your wires are properly connected to the battery pack!

Measuring Resistance in Electrical Items

Measuring resistance in electrical items is relatively simple with the right tools.  Resistance is the measure of difficulty electrons have in flowing through an object.  It is a little bit like friction when objects are moving over surfaces.  Resistance is measured in ohms; 1 ohm is equal to 1 volt of electircal difference per 1 ampere of current.  Resistance can be measured with an analog or increasingly with digial multimeters or ohmmeters.

When you are testing resistance, you should do so on components rather than in a circuit.  Measuring resistance on a component when it is in a circuit will often cause inaccurate readings, because the multimeter is measuring the resistance from the other components in the circuit as well as the one being tested.  Sometimes, it is useful to test within the circuit though.

Pressure Sensors: The Multi Use Electrical Gadget!

There are many industries which rely on clever electronic gadgets in manufacturing, applications and industry. Pressure sensors are one of those gadgets which is not that heard of outside of the industries which use them all the time.

A pressure sensor can come in a wide range of guises, from heavy duty sensors for larger industry through to miniature packages to gauge pressure in small applications.  Pressure transmitters are amplified outputs with absolute pressure or gauge pressure for reference.  The pressure sensors available for lots of different applications can be bought and ordered online from specialist companies such as Strain Sense, which is the leading figure in strain gauges and pressure sensors in Europe.  They stock a wide range of different sensors for industries such as the motorsport industry, transport and aeronautical systems.

You can discover more about pressure sensors on the Strain Sense website, or try looking them up online to find out more information.