Build a simple electronic circuit

  1. Connect two 1.5 Volt cells in series  to form a 3 Volt battery. Do this by inserting the cells the correct way into the battery holder.
  2. Apply a potential difference on to the lamp. With the lamp screwed into the lamp holder connect the red wire to one side and the black wire to the other side of the lamp holder. It is important that you connect the soldered copper wire directly on the metal lamp-holder terminals. 
  3. Electricity will start to flow you have made a closed circuit.

Congratulations you have discoverer electricity!

Reading a Schematic Diagram

Conventional electricity flow state that the current is flowing from the more positively charge side to the more negatively charged side. This is way we place the positive side on the top of the schematic diagram now we can think as if the current is flowing from top to bottom.

When we read we read from left to right so we can think that things start to happen from left to right so we place the switch first where it can start by controlling the current to flow.

Next in line is the resistor the resistor is placed before the LED where we can think of it as if it restrict the current from damaging the LED.

Switches in series

Get you soldering iron and let’s have fun with switches.

After soldering this simple circuit, I started playing with the switches. At first it felt like magic because sometimes the light went on and sometimes it did not. I played some more and started to see that any of the two switches can control the other switch.

If I decided that switch two must have control I left switch one on now switch two can switch the lamp on and off. If I decided to give switch two no control I just left switch one off now switch two have no control.

I figure mains switches is wired in series with the rest of the circuit if you switch the mains switch off the rest of the switches have no power on them if you left the mains switch on the rest of the switches will work again.

Lamps in parallel

I have hooked up this circuit to show that current will flow everywhere in a closed conducting circuit maybe not the same amount of current but it is important to know that there will be current flow everywhere.

Voltage divider

This voltage divider is made up of two 220E resistor. I did this experiment to see for myself that one can get a smaller voltage from a lager voltage using a voltage divider. I have tested both the input voltage and the output voltage with my multi-meter and found that I have divided the input voltage. The input voltage read 8.4V and the output voltage 4.2V.