41646A datasheet(21/50 Pages) MICROCHIP

21 / 50 page

WIRELESS SECURITY REMOTE CONTROL

DEVELOPMENT KIT USER’S GUIDE

 2012 Microchip Technology Inc.

DS41646A-page 21

Chapter 3. PIC12LF1840T39A Wireless Remote Key Fob

3.1

INTRODUCTION

The PIC12LF1840T39A Wireless Remote Key Fob is a demonstration and

development platform for wireless security remote control applications. This section

gives a detailed description of the key fob.

3.2

HARDWARE DESCRIPTION

Figure 3-1 shows the key fob. The enclosure is an off-the-shelf key fob enclosure from

Polycase (http://www.polycase.com/). The enclosure houses a two-sided Printed

Circuit Board (PCB).

The schematic, PCB layout, and Bill of Materials are listed in Appendix

A. “PIC12LF1840T39A Wireless Remote Key Fob Schematics”

FIGURE 3-1:

PIC12LF1840T39A WIRELESS REMOTE KEY FOB

3.3

PRINTED CIRCUIT BOARD DESCRIPTION

The key fob PCB is a two-layer, plated through hole, 0.031 inches (0.7874 millimeters)

thick, FR4 material. Figure 3-2 shows the top layer of the PCB. All components, except

the LED, are on the top layer. A PCB antenna is employed in the design for reduced

cost and compactness. The PCB antenna is explained in more detail below.

P1 is the ICSP™ programming port. See Chapter 6. “Developing with the Wireless

Security Remote Control Development Kit”

for suggestions on developing and

programming the key fob.

TopButton

LeftButton

RightButton

BottomButton

LED

41646A 데이터시트(PDF) 21 Page - Microchip Technology