270 BEST ENGINEERING PROJECTS
PROJECT NO. 02
NAME:
Periodically on-off Mosquito repellents circuit
Some of the mosquito repellents available in the market use a toxic liquid to generate poisonous
vapours in order to repel mosquitoes out of the room. Due to the continuous release of poisonous
vapours into the room, after midnight the natural balance of the air composition for good health
reaches or exceeds the critical level. Mostly, these vapours attack the brain through lungs and
exert an anesthetic effect on mosquitoes as well as other living beings by small or greater
percentage. Long exposure to these toxic vapours may cause neurological or related problems
CIRCUIT DIAGRAM:
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