Bike Alarm

Added by Roy Davidson on Dec 15, 2008

In this activity the student has to draw a circuit from a picture involving two 555 monostable chips, a bistable chip, potential dividers and capacitors. The material revises monostable and bistable circuits, and guides the pupil through the operation of the circuit to see how it can be used to detect when a bike is moved.



  • Monostable Revision
  • Bistable Revision



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