Electronics & Communication Engineering Project on Galvanic Skin Response (GSR)

Electronics & Communication Engineering Project on Galvanic Skin Response (GSR) also identified as electro dermal response (EDR). This is a method by which electrical resistance of the skin is measured. In simple terms it is an ohmmeter and basically functions as an alcohol detection system. A sensor circuit is present to ascertain if the driver has consumed alcohol or not.

Though the law has provisions by which drunk drivers can be punished yet it is not practically possible for the police to check every car driver. This generates the need to design an efficient alcohol detector system.

electronics-communication-engineering-project-on-galvanic-skin-response-gsrThe alcohol detection circuit developed using Galvanic Skin response is designed by interfacing on the ignition circuit a set of sensors, a microcontroller and a logic circuit. When the ignition key is turned ON, the electrical circuit of the car becomes a closed one. When this happens the solenoid port opens dropping down the mask coinciding with the alcohol testing chamber port and closing of exit port. The driver will now exhale into the mask and this air reaches the testing chamber where it is processed and accordingly the engine is cranked.

This method is based on the fact that alcohol consumption decreases the pulse rate. At the initial testing stage pulse rate of a person is recorded using pulse sensors. This is taken as reference and any deviation from this pulse rate results in the stoppage of the car.


This project is excellent for minimizing road accidents caused due to drunk driving. It also eliminates the potential embarrassment caused by stooping by police. The time taken by this system is only 10 seconds and cost of installation is cheap too. Major changes are also not required.  Government must make it a point to include this in all cars to avert accidents and try to include in the manufacturing stage itself.

Download Electronics & Communication Engineering Project on Galvanic Skin Response (GSR).

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