LSQ976-NR-1-0-20-R18 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

LSQ976-NR-1-0-20-R18 Datasheet(PDF) 21 Page - Microchip Technology