This circuit is used as a checkpoint for competition in the robot field, which can choose to display 2 types, light or sound.
- Power supply : 2 rechargeable AA batteries (not included).
- Electric current consumption : 100mA.
- Detection : Micro switch.
- Display : LED or Buzzer sound or both.
- There is a stop switch when the circuit works.
- PCB dimension : 2.92 in x 1.25 in.
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