Circuit Diagram Descriptions
Circuit 1 is the oscillator circuit. IC4098 dual monostable retriggerable were placed in this circuit. It is the main IC that controlled all the operation in this system. It will made short retriggerable operation when get and input from reed switch. The Reed switch is the switch that made from magnet. It is use as the sensor in this system and sent an input to IC 4098.
Circuit 2 is the timer circuit. IC 4093 schmitt NAND gate were placed in this circuit. It is not the main IC in this system but it is important component on controlled operation in this timer circuit. It will made inverse operation to turn the negative positive signal when get an input from IC 4098 and then continue to sent an input to the LED and piezo sounder. The LED will produce light as indicator and the piezo sounder will made a sound as the output.
Ok, you have the cct diagram then what? Did you construct the circuit or simulate the circuit? What are the results? Successful tested? Having problem? What are possible solution? These are the things that you have to include in the blog.
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