Drink driving or driving under the influence of alcohol is major problem throughout the world. In Ireland, drink driving has increased in its occurrences and the amount of people who still take the chance and drink and drive is high. According to reports released from the Road Safety Authority, the first two months of 2019 alone in Ireland, there has been a 17% increase in people being caught while driving under the influence since the preceding first two months of 2018. It was found that the main method in Ireland at least of catching intoxicated drivers was the use of checkpoints. Although, due to manpower and rural areas, it is difficult for police to be in the right place at the right time. This paper explores the option of using a Raspberry Pi as a device that could be used to prevent or stop a driver under the influence of alcohol from operating their vehicle. In order to test the sensor, a series of sober breath samples and a series of alcohol-potent products were used. The results have proven that the Raspberry Pi along with a MQ-3 gas sensor can accurately evaluate Blood Alcohol Concentration.