This paper presents the design and development of a low-cost ventilator intended for emergency situations and resource-constrained environments. An overview of various research is done on how human lungs are used for respiration to understand the working principle of the ventilator. The ventilator is engineered to deliver breaths within a range of 5 to 30 per minute through a pulley and lever mechanism driven by an electromagnetic stepper motor, drawing power from a 12V supply. Offering flexibility, the device provides a tidal volume output ranging from 400ml to 1000ml and an adjustable inspiration to expiration ratio of 1:3, which can be tailored to meet individual patient requirements. To enhance usability, the ventilator is equipped with an LCD screen user interface that displays the set tidal volume, breaths per minute, and inspiration to expiration time ratio. Additionally, the system is equipped with two pressure sensors integrated into the patient connector, enabling precise measurements of flow rate and pressure changes in the oxygen delivery tube. Ensuring reliability, the device has been carefully calibrated to maintain a 10% accuracy rate in delivering the set output. This prototype showcases the potential of automated Ambu bag compression, offering a cost-effective and portable ventilator system that delivers essential ventilation features, rivaling existing technology at a significantly reduced cost.