Capacitive Sensors using NE555 timer IC along with Arduino Uno development board

In this article, a capacitive sensors using NE555 timer IC along with Arduino Uno development board can be designed, the principle behind such sensor are creating square pulse in astable multivibrator mode the capacitor C1 (can been seen in the diagram below) is used to read the variable environment, which is then feed to arduino Analog pins and the microcontroller can be read the signal and further process can be done. We finally undrestand the principle, LETS build one. Schematic Diagram
The above circuit is enogh for creating square pulse, but the goal is to make it capacitive sensor, here the C1 will be removed and it will be connected with the probes.

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