An environmental scientist has commissioned you to design a system that will monitor the level of a river. The scientist is interested to know if:
- The river goes high
- Then goes low
- Then goes high again
If this happens, a light will go on and stay on.
The scientists will leave your device on the riverbank and come back a week later to see if the light is on. A reset button is required for the scientist to reset the light.
- The river goes high
- Then goes low
- Then goes high again
If this happens, a light will go on and stay on.
The scientists will leave your device on the riverbank and come back a week later to see if the light is on. A reset button is required for the scientist to reset the light.
