Smoke sensor design includes principle circuit design, PCB and BOM list
If you are interested, you can take a look or download the schematic diagram and BOM table of the tds detection pen.
The Touch Sensing Software Evaluation Board (TSSEVB) contains everything you need to get started with touch sensing applications. The touch-sensing software library supports capacitive sensing across the entire NXP® S08 MCU portfolio, providing touch-sensing decoding structures such as keyboard, rotation, and slider.
The PCT2075DP Arduino Shield has most temperature sensor functionality on a board compatible with the Arduino R3 pinout. The graphical interface allows the user to easily explore the different functions of the temperature sensor. In addition, users can find embedded drivers and demo applications as reference code to get started quickly.