Week#4- Journal

materials

I assembled the parts of the wood and made holes in it on both sides, using a drill to pass the iron wire through them.

Then I painted it with white wood paint and left it for 2 hours to dry.

For the handle I used a piece of foam and carved it with sandpaper, then inserted an iron wire with a closed loop at its end.

Then I prepared the electrical circuit, brought the board and connected it to the buzzer in parallel with the LED.

Where the positive terminal of the buzzer is connected to the positive terminal of the LED and the two are connected to a wire coming from the power source.

The negative end of the LED is connected to the resistor

The other end of the resistor is connected to the negative terminal coming from the power source and to the negative terminal of the buzzer

Before inserting the positive wire from the power source to the components, it must first pass the on-off switch

Then, after completing the circuit, I took the negative side out of the buzzer and connected it to a copper wire wrapped on the iron wire fixed in the wood.

I connected the negative terminal of the power supply to the iron wire on the handle

Thus, when the iron wire comes into contact with the handle and the installed iron wire, the circuit is completely closed and the current passes and the buzzer emits a sound and the LED lights up.

-I used a 5 volt power supply because the buzzer operates at 3 to 5 volts

The red LED is at 1.8 volts

Therefore, the 5 volt power source is sufficient to operate them. Therefore, I connected it in parallel so that only enough would pass through each of them and to avoid the entry of an extra volt to an unbearable component, which would burn.