WIRELESS SECURITY REMOTE CONTROL
DEVELOPMENT KIT USER’S GUIDE
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
TopꢀButtonꢀ
3
LeftꢀButtonꢀ
RightꢀButtonꢀ
4
1ꢀ
BottomꢀButtonꢀ
2
LEDꢀ
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.
2012 Microchip Technology Inc.
DS41646A-page 21
MICROCHIP [ MICROCHIP ]
