Electronics

Electronics

1. Components

   • Inputs, processes and outputs
     • Resistor - reduces flow of current to the requirements of the components after it
       • Switch - Used to turn circuit on and off, but can also be used for other things. Large variety (tilt, reed etc)
         • PTM- complete a break in a circuit when pushed. Can be used as a trigger in a monostable circuit
           • LED - can be used to show that the circuit is active
             • Speakers - needed so that music can be played
   • Integrated circuits
     • 555 - can be used to create a monostable or astable circuit
       • 417 - Increases/decreases the ouput singal in accordance to the input signal it recieves

2. Testing

   • Crocodile Technology - I will firstly design the circuit on croc clips so that I can find which component values suit the purpose the most
     • Breadboarding- The circuit will then be made onto a breadboard to be tested, and to see if it works
       • Real PCB- This will be used to design the final breadboard.

3. Quality Control

   • Shrink wrap - prevent short circuits because they cover component legs
     • Strain Holes - Battery clips should be placed through a strain hole because they will be pulled often, and this stops them from breaaking easily
       • Visual check - Tracks of the PCB should be checked visually first to see any clear mistakes
         • Multimeter testing - This test should occur before components have been soldered and after, to check that the current is flowing to all parts of the circuit

4. Power Supply

   • Battery
     • This makes the product portable as it doesn't have to be plugged in all the time to work
   • Mains
     • Mains PSU will mean that the speaker will not stop working becuase it wont run out of battery