🌲 Control aircon by monitoring temperature in other parts of the room 🎐

power AA
wireless Infrared
sensor Temperature
mcu SAMD21G
bom items 49
bom cost USD $9.71
vendors 2
status ongoing

Lessons learnt

Good practices to continue for future projects

  • Do not reset annotations for components as previously annotated components might have already been associated with BOM
  • Do not copy and paste symbols for different parts of the schematic as they might copy over other field values
  • Refer to application circuit in datasheets to connect various passives
  • Consider pulling out some unused pins as pads if the board is to be used for future development and iteration E.g. Teensy
  • Consolidate shipping orders for parts and components so that fewer deliveries are made


For next iteration

  • Use SMD components for IR receiver and emitter


Simple iterations that were implemented in this project because of the learnings from the previous projects

  • Added power annotations on the silkscreen
  • Used standard grid size for component placements and routing
  • Used standard text size
  • Used standard component sizes
  • Added a power on/off button
  • De-modularised to use only the micro-controller and no dev boards
  • Created a complete 3D rendering with all components
  • Pulled out some unused pins as test points
  • Added solder jumper points for circuit isolation