This paper presents the design and optimization of a power and communication architecture for a car dashcam system with integrated WiFi data transmission. The system architecture utilizes a 5V DC power supply regulated through DC-DC buck converters and Low Dropout Regulators (LDOs) to provide stable power to the image sensor and other subsystems. To improve image quality, especially in low-light conditions, power stability was enhanced using additional capacitors and beads to mitigate noise and ripple effects. The primary communication link between the dashcam’s sensor and the WiFi module is established via a UART interface, enabling efficient real-time data transmission to mobile devices. The image sensor’s digital data is processed by an ISP (Image Signal Processor) and transmitted through the MIPI interface to the SoC, while the WiFi module provides seamless data connectivity for remote access and live monitoring. This paper discusses the power design challenges, particularly in the analog and digital domains, and evaluates the impact of power noise on image quality and transmission reliability over WiFi. Test results demonstrate that improving power integrity significantly reduces noise artifacts, such as horizontal bands in low-light video, and enhances the overall performance of the WiFi transmission. This solution is particularly relevant for automotive and IoT applications where stable image capture and efficient wireless communication are critical.