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Designing a device capable of remotely opening and closing a sliding window for individuals with reduced mobility. 

Our solution consists of a mechanical aspect (for operating the window accordingly), an electrical aspect (power supply and electronics) and a software aspect (an app to be used by the client from her phone or ipad to remotely control the device).

On the mechanical side, our solution consists of a lead screw driven linear actuator mechanism to open/close the window, a mounting base to hold the mechanism and a latch-based window-to-device connection system (to allow for switching to manual operation of the window).

The electrical side comprises a DC power connector for direct current supply, a fuse holder for safe integration of fuses, a stepper motor with its integrated circuit for precise movement, a voltage regulator for stable output, and additional components such as a WiFi-enabled ESP32 microcontroller, humidity sensor, and LEDs. Designed to ensure a robust power supply and proper device operation, it includes features like overcurrent protection and controlled movement within the circuit. 

On the software side, we used the ESPHome Framework to integrate with the Home Assistant Companion app for a trusted and accessible software solution for smart home devices. This allowed us to develop an easy-to-use application that can interface with our device remotely (as we are using an ESP32 microcontroller), and that includes Siri voice control integration to allow for a more accessible solution for our client. 

Our design cost an approximated total of $95 (CAD), which fell under our allotted budget of $100 for this project,

Some important details to consider when replicating this design include the sliding window type, it's dimensions and the specific client's use cases (e.g., whether or not they require a manual mode of operation for caregivers to operate the window, whether or not they require to remove the window frame to clean it for example, which would require the device to be removable or moved out of the way). These various requirements greatly affected the design of the solution to cater for the client's needs as much as possible while ensuring a functional solution.