ELECTRONIC BRICK - TOUCH SENSOR/BUTTON BRICK (IM120710023)

This is a simple touch sensor module. You can use it to replace a traditional push button. Using the TTP223-B touch detector IC It measures the capacitance of a metallic pad. It can detect the change in capacitance when a finger is near it. This is the same technology used in the iPhone touch screen. So you can place the metallic pad under a non-metallic surface such as a plastic or glass sheet and it will still work as a button. This may be useful for projects that need to be waterproof. You can also make a secret button by placing it inconspicuously behind a smooth surface. For instance you could place them under a nonmetallic card table and by casually pressing the right location on a tabletop surface you could mysteriously control your DIY project. 

Features

• Electronic compatible interface 
• 2.0-5.5V DC supply 
• response time max about 60mS at fast mode, 220mS at low power mode @VDD=3V 
• Low power consumption 

Applications Ideas

• Inconspicuous button 
• Water proofed electric product 
• Button key replacement

Programming

The following sketch demonstrates a simple application of controlling the led by the Touch sensor. When you touch the electrode using your finger, the led light.

Documents

Schematic

Datasheet

Specification