Switch Sensor PCB Design + full build
Budget: $10 – $70 USD
Please note this is not just a PCB design task, I need a complete implemented solution
I need a compact, ultra-low-power PCB that can read a group of simple slot-mounted switch and immediately report its state over Bluetooth. The board must operate from both a rechargeable battery and a small solar panel, so smart power-path control and energy harvesting are central to the design.
I picture a single microcontroller with integrated Bluetooth Low Energy, a high-efficiency buck/boost stage, battery charging and protection circuitry, and a clean, debounced input line for the switch. Low standby current is critical: the device should sleep until the switch changes or a scheduled health-check broadcast is required. Once the object is placed or removed, the board wakes, advertises the new status, and returns to deep sleep.
Space is tight; keeping the footprint minimal while allowing easy assembly is important. I can supply mechanical constraints and the exact switch model as soon as we start. I need this done as soon as possible, so please approach the task with components that are readily available.
Deliverables
• Complete schematic in KiCad, Altium, or Eagle
• Optimized PCB layout and Gerber files ready for fabrication
• Detailed BOM with primary and alternate parts (all in-stock)
• Simple reference firmware that advertises “occupied / vacant” over BLE for quick testing
• Assembly notes and test procedure to verify current draw and wireless range
I’m ready to move quickly and will be responsive to keep momentum high.
I need a compact, ultra-low-power PCB that can read a group of simple slot-mounted switch and immediately report its state over Bluetooth. The board must operate from both a rechargeable battery and a small solar panel, so smart power-path control and energy harvesting are central to the design.
I picture a single microcontroller with integrated Bluetooth Low Energy, a high-efficiency buck/boost stage, battery charging and protection circuitry, and a clean, debounced input line for the switch. Low standby current is critical: the device should sleep until the switch changes or a scheduled health-check broadcast is required. Once the object is placed or removed, the board wakes, advertises the new status, and returns to deep sleep.
Space is tight; keeping the footprint minimal while allowing easy assembly is important. I can supply mechanical constraints and the exact switch model as soon as we start. I need this done as soon as possible, so please approach the task with components that are readily available.
Deliverables
• Complete schematic in KiCad, Altium, or Eagle
• Optimized PCB layout and Gerber files ready for fabrication
• Detailed BOM with primary and alternate parts (all in-stock)
• Simple reference firmware that advertises “occupied / vacant” over BLE for quick testing
• Assembly notes and test procedure to verify current draw and wireless range
I’m ready to move quickly and will be responsive to keep momentum high.