Next you will use the soldering iron to do the following connections: When it isn't, the circuit is open - the buzzer will not ring and the LED will not turn on.
Here is the whole idea: When the stick touches the thick conductor, it will close the circuit - the buzzer will ring and the LED will turn on. Note: make sure that the buzzer and LED are placed the same way for polarity! The longer pins of both components (positive) are one the upper side and the shorter pins (negative) are down! Place the components (LED, buzzer, switch) as shown in the photo. Insert the thick conductor into the holes you created. 2 holes for the thick conductor wire (one on each side, opposite ends) 1 hole for a thin wire (several cm from the switch)
1 hole for LED (right beside the buzzer) You are going to be drilling a lot of holes for everything to be put together. Let’s get into the fourth step of this assembly. Glue gun (Note: Can be replaced by super glue or duct tape.) Wooden/cardboard/plastic board ~50x70cm Can be replaced by a normal thin electrical wire wrapped around a metal clothes hanger)) Thick strong conductor (Note: should be strong enough to stand alone after the design. Do some calculations with the Ohm’s law! I=V/R) 10Ω resistor (To regulate the current going through the LED and buzzer, otherwise they might be burnt and the capacity of the resistor will surely depend on the battery used and the max power the components can take. It is always nice to turn off the power rather than cutting the circuit. Switch (ON/OFF) Note:That is not a must. 9V battery & 9V battery connecter (Note: can be replaced by 4 AA batteries with their adjustor) You can use your creativity to replace them with items that you have at your own home or workplace or that you can dig out from broken electronics or appliances. Keep in mind these are just examples! Alternatives and workarounds are encouraged. Make sure you have all your supplies handy before you start! Here’s a list of all the things you will need. The best thing about this activity is the construction.
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