Cypress Semiconductor CapSense CY8CKIT-022, Manual, Page: 3 / 33

CY8CKIT-022 CapSense® Liquid Level Sensing Shield Kit Guide, Doc. #: 002-09825 Rev. ** 3
Contents
1. Introduction
1.1 Kit Contents .................................................................................................................7
1.2 Getting Started.............................................................................................................8
1.3 Additional Resources ...................................................................................................9
1.4 Hardware Requirements ..............................................................................................9
1.5 Software Requirements .............................................................................................10
1.5.1
PSoC Creator.................................................................................................10
1.5.2 PSoC Programmer.........................................................................................10
1.6 Application Notes and Projects ..................................................................................10
1.7 Technical Support ......................................................................................................10
1.8 Documentation Conventions .....................................................................................11
1.9 Acronyms ...................................................................................................................11
2. Kit Hardware 12
2.1 Board Details .............................................................................................................12
2.2 Kit Assembly ..............................................................................................................15
2.3 Theory of Operation ...................................................................................................17
2.3.1
Principle of Capacitive Liquid Level Sensing .................................................17
2.3.2 CY8CKIT-022 Kit............................................................................................18
2.4 Functional Description ...............................................................................................19
2.4.1
Two Sensor Flexible PCB ..............................................................................19
2.4.2 12 Sensor Flexible PCB .................................................................................19
2.4.3 Flexible Sensor Connector.............................................................................20
2.4.4 Arduino-Compatible Headers .........................................................................20
2.4.5 Temperature Compensation Sensor ..............................................................22
2.4.6 Integration Capacitors ....................................................................................22
2.4.7 UART Connection ..........................................................................................23
2.4.8 Liquid Container .............................................................................................23
3. Example Projects 24
4. Design Support 25
A. Appendix 26
A.1 Shield Schematic .......................................................................................................26
A.2 2RX Sensor Schematic..............................................................................................27
A.3 12RX Sensor Schematic............................................................................................28
A.4 Shield Layout .............................................................................................................29
A.5 2RX Sensor Layout....................................................................................................30
A.6 12RX Sensor Layout..................................................................................................31
A.7 Bill of Materials ..........................................................................................................32