2. Install the battery and insert it into the battery holder, and then insert the battery holder into the bread board. Insert the battery into two places in bread board.
3. Two connecting wires are respectively led out from the positive and negative poles of the battery.
Bread board is specially designed and manufactured for the solderless experiment of electronic circuits because there are many small jacks on the board. Because all kinds of electronic components can be inserted or pulled out as needed, welding is avoided, the assembly time of the circuit is saved, and the components can be reused, so it is very suitable for the assembly, debugging and training of electronic circuits.
Alarm is an electronic product that reminds or warns us that we should take some action in the form of sound, light and air pressure to prevent or prevent the consequences of an event.