Developer creates an f-stop timer using an iPhone and a smart plug

Software developer Peter Szentkiralyi has introduced a creative hardware project that repurposes a standard $20 smart plug and an iPhone into a functional f-stop timer for photography. By leveraging the smart plug's connectivity, the system allows photographers to automate exposure times with precision, effectively turning consumer-grade smart home hardware into a specialized tool for the darkroom. The project highlights the potential for repurposing affordable IoT devices for niche technical applications. Szentkiralyi has shared the technical details and the logic behind the integration, demonstrating how simple automation can solve specific workflow challenges. This DIY approach offers a cost-effective alternative to expensive, dedicated darkroom timers, showcasing the versatility of modern smart home ecosystems when combined with custom software logic. The project is currently available for review by the community, inviting further experimentation and potential improvements for analog photography enthusiasts.