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Kit#: QK21 WATER LEVEL INDICATOR ALARM : Indicator for over- flowing Water Tank . When the tank filled it's buzzer and led will be ON. Just use Simple wires as a sensor. You can make multiple levels to add more kits. Also you can use this kit as water sensor. DC 12V power supply required ( power supply not included in kit). Simple , Cheap , and reliable result. Price: $ 3.00 each Quantity Kit#: QK69 CLAP SWITCH (SOUND WHISTLE) : When you clap, there is a small condenser mic, it will sense and the relay switch is given in kit, it will be ON and again when you clap the relay will be ON. You can also use the Traic, but we sully the relay in the kit. operated at 12V DC (power supply not included in kit). Best kit for beginners. Price: $ 3.00 each Quantity Kit#: QK86 OPTO-COUPLER SENSOR KIT : This is the opto coupler sensor U type kit . The sensor is used for high speed infra red rays cut an dwe use to controll pulses Cmos 4093. Led 1 will be ON when the pulse will generated from kit. kit is operated at 12 V DC. Price: $ 4.00 each Quantity

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