Low-cost flood alarm
A float switch and buzzer that warns families when river water rises above a set mark.
Built for under 400 Tk using a plastic bottle float, a reed switch and a 9V buzzer. Tested for two weeks on the bank of the Padma.
A float switch and buzzer that warns families when river water rises above a set mark.
Built for under 400 Tk using a plastic bottle float, a reed switch and a 9V buzzer. Tested for two weeks on the bank of the Padma.