Seeder Dry Channel Blockage Alarm (the 1st)

Published:2011/8/6 8:45:00 Author:Felicity | Keyword: Seeder, Dry Channel Blockage, Alarm | From:SeekIC

Work of the circuit The circuit consists of infra-red detection circuit, trigger control circuit and sound alarm circuit. (It is showed in picture 4-100.) Infra-red detection circuit consists of infrared light-emitting diode VL, infrared photodiode VD and resistors Rl, R2. Trigger control circuit consists of transistor Vl, potentiometer RP, resistor R3, capacitor C2-C4 relative to time-base IC lC. Sound alarm circuit consists of resistors R4-R7, transistor V2-V4, capacitor C5 and the speaker BL.



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