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    COST OF PIC16F877A MICROCONTROLLER Search Results

    COST OF PIC16F877A MICROCONTROLLER Result Highlights (5)

    Part ECAD Model Manufacturer Description Download Buy
    TMP89FS60AUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/LQFP64-P-1010-0.50E Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS63AUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/LQFP52-P-1010-0.65 Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS60BFG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/P-LQFP64-1414-0.80-002 Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS63BUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/P-LQFP52-1010-0.65-002 Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS62AUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/LQFP44-P-1010-0.80A Visit Toshiba Electronic Devices & Storage Corporation

    COST OF PIC16F877A MICROCONTROLLER Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    interfacing pic16f877a with ir sensors

    Abstract: PIC16F877A SPECIFICATIONS PIC16F72 interfacing with LCD PIC16F877A Microcontroller energy meter circuit interfacing PIC16F877A with lcd PIC16F877a SAMPLE C pwm program PIC16F877A pin lcd tutorial for pic16f877a PIC16F877A digital voltmeter pic
    Text: Utility Metering Design Solutions Complete Utility Metering Solutions Design Innovation in Gas, Water, Heat and Energy Meters Engineers face a variety of design challenges as they push new innovations within their own applications. In meter designs, innovation usually rests with increasing accuracy


    Original     		PDF DS01008A DS01008A* interfacing pic16f877a with ir sensors PIC16F877A SPECIFICATIONS PIC16F72 interfacing with LCD PIC16F877A Microcontroller energy meter circuit interfacing PIC16F877A with lcd PIC16F877a SAMPLE C pwm program PIC16F877A pin lcd tutorial for pic16f877a PIC16F877A digital voltmeter pic

    PIC16F877A Microcontroller

    Abstract: pic16f877a full instruction set PIC16F877A pin PIC16f877a example code spi PIC16F877A Microcontroller eeprom PIC16F877A MICROCHIP cost of PIC16F877A Microcontroller PIC16F877A SPECIFICATIONS PIC16F877A 40 pin MICROCHIP PIC16F877A circuit hardware
    Text: AN975 Using the MSSP Module to Interface Microwire Serial EEPROMs to PIC16 Devices Author: This application note provides assistance and source code to ease the design process of interfacing a Microchip mid-range PIC16F877A microcontroller to a Microchip Microwire serial EEPROM. The Master


    Original     		PDF AN975 PIC16 PIC16F877A requ34-8870 DS00975A-page PIC16F877A Microcontroller pic16f877a full instruction set PIC16F877A pin PIC16f877a example code spi PIC16F877A Microcontroller eeprom PIC16F877A MICROCHIP cost of PIC16F877A Microcontroller PIC16F877A SPECIFICATIONS PIC16F877A 40 pin MICROCHIP PIC16F877A circuit hardware

    PIC16F877A assembly programming

    Abstract: PIC16F877A flowcode programming flowcode PIC16F877 and Parallel port interfacing circuit cost of PIC16F877A Microcontroller PIC16F877A Microcontroller free pic16f877a PIC16F84 usb programmer circuit PIC16F877A circuit programmer PROGRAM PIC16F73
    Text: E-blocks Multiprogrammer PICmicro microcontroller programmer and development board EB006 matrix multimedia • E-blocks compatible • Can be used as a programmer and as a development board • Programs a wide range of PICmicro MCU devices • RC or Xtal operation


    Original     		PDF EB006 PIC16F88 IC16C765, PIC16C77, PIC16C773, PIC16C774, PIC16C84, PIC16CE623, PIC16CE624, PIC16CE625, PIC16F877A assembly programming PIC16F877A flowcode programming flowcode PIC16F877 and Parallel port interfacing circuit cost of PIC16F877A Microcontroller PIC16F877A Microcontroller free pic16f877a PIC16F84 usb programmer circuit PIC16F877A circuit programmer PROGRAM PIC16F73

    PIC16F877A pin

    Abstract: PIC16F877A datasheet pic16f877a PIC16F877A 40 pin MICROCHIP MICROCHIP PIC* 40pin PCM16XV0 PIC16F877A circuit programmer free download pic16f877a datasheet PIC16F877A dATASHEET PIC16F874A
    Text: Tools from Microchip Make Designing Easier, Faster Socket Adapter Supports 8-pin DFN Package Using the AC164032 Socket Adapter in conjunction with the PRO MATE II Universal Production Programmer DV007003 with AC124001 socket module or with Microchip’s PICSTART® Plus


    Original     		PDF AC164032 DV007003 AC124001 DV003001) 40-pin 16-pin PCM16XV0 PIC16F873A, PIC16F874A, PIC16F876A, PIC16F877A pin PIC16F877A datasheet pic16f877a PIC16F877A 40 pin MICROCHIP MICROCHIP PIC* 40pin PIC16F877A circuit programmer free download pic16f877a datasheet PIC16F877A dATASHEET PIC16F874A

    7x5 dot matrix led displays

    Abstract: arduino uno ASM117 28BYJ-48 mg995 ASM117-3 28BYJ48 4x4 matrix keypad in pic with c code PIC16F877A manual PIC 24C16
    Text: PPIC IC DDevelopment Board Ultra 2 IC + Arduino UNO USER'S GUIDE WIDE.HK page 2 PIC Development Board Ultra 2 Table of content Introduction Connectivity Introduction to PIC . . . . . . . . . . . . . . . . . . . . . . . . . . . .03 PIC sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


    Original     		PDF WU-003 ILI9325 WU-005 WU-007 28BYJ-48 WU-004 KS0108 128x64 WU-006 MG995 7x5 dot matrix led displays arduino uno ASM117 ASM117-3 28BYJ48 4x4 matrix keypad in pic with c code PIC16F877A manual PIC 24C16

    L293D H-bridge motor drive

    Abstract: PIC16F877A circuit diagram ic L293D PIN CONFIGURATION PIC16F877A power on reset circuit diagram dc motor drive circuit pic16f877a h-bridge motor drive circuit L293D ic L293D control dc motor using Pic16F877A L293D circuit diagram PIC16F877A PIN diagram
    Text: E-blocks Power board Document code: EB011-30-1 Power board datasheet EB011-00-1 Contents 1. 2. 3. 4. 5. About this document. 2


    Original     		PDF EB011-30-1 EB011-00-1 L293D L293D H-bridge motor drive PIC16F877A circuit diagram ic L293D PIN CONFIGURATION PIC16F877A power on reset circuit diagram dc motor drive circuit pic16f877a h-bridge motor drive circuit L293D ic L293D control dc motor using Pic16F877A L293D circuit diagram PIC16F877A PIN diagram

    control dc motor using Pic16F877A

    Abstract: control dc motor speed using Pic16F877A interfacing PIC16F877A with lcd dc motor drive circuit pic16f877a x10 pic an236 PIC16F877A keypad interfacing microchip AN857 Dc motor speed Controlled with Pic16F877A PIC16F877A Microcontroller PIC18 example codes lcd
    Text: Home Appliance Solutions Electronic Solutions for Today’s Appliance Designers • • • 8-bit PIC Microcontrollers Analog Peripherals Interface Products User Interface • Touch Pads • Bar Codes • Key Pads • LED • LCD Basic Control • Clocks and Timers


    Original     		PDF 16-bit DS00241A QS-9000 control dc motor using Pic16F877A control dc motor speed using Pic16F877A interfacing PIC16F877A with lcd dc motor drive circuit pic16f877a x10 pic an236 PIC16F877A keypad interfacing microchip AN857 Dc motor speed Controlled with Pic16F877A PIC16F877A Microcontroller PIC18 example codes lcd

    interfacing of PIC16F877A with 2X16 lcd

    Abstract: P16F877A PIC16F877A 2x16 LCD zero crossing detector PIC dimmer interfacing PIC16F877A with lcd pic microcontroller triac control x10 pic an236 2X16 lcd module pic16f84 PIC16F877A using temperature sensor PIC16F877a instruction clock timing diagram
    Text: AN236 X-10 Home Automation Using the PIC16F877A Author: HARDWARE OVERVIEW Jon Burroughs Microchip Technology Inc. The home controller application described in this application note allows the user to program on and off times for up to sixteen devices, using a 2 x 16 liquid crystal


    Original     		PDF AN236 PIC16F877A D-85737 DS00236A-page interfacing of PIC16F877A with 2X16 lcd P16F877A PIC16F877A 2x16 LCD zero crossing detector PIC dimmer interfacing PIC16F877A with lcd pic microcontroller triac control x10 pic an236 2X16 lcd module pic16f84 PIC16F877A using temperature sensor PIC16F877a instruction clock timing diagram

    PIC Light Dimmer

    Abstract: x10 pic an236 zero crossing detector PIC dimmer TRIAC dimmer pic PIC18F452 PWM example codes interfacing of PIC16F877A with 2X16 lcd pic triac PIC16F877A 2x16 LCD PWM GENERATION using Pic16F877A PIC16F877A circuit diagram
    Text: AN236 X-10 Home Automation Using the PIC16F877A Author: HARDWARE OVERVIEW Jon Burroughs Microchip Technology Inc. The home controller application described in this application note allows the user to program on and off times for up to sixteen devices, using a 2 x 16 liquid crystal


    Original     		PDF AN236 PIC16F877A DS00236B-page PIC Light Dimmer x10 pic an236 zero crossing detector PIC dimmer TRIAC dimmer pic PIC18F452 PWM example codes interfacing of PIC16F877A with 2X16 lcd pic triac PIC16F877A 2x16 LCD PWM GENERATION using Pic16F877A PIC16F877A circuit diagram

    interfacing pic16f877a with ir sensors

    Abstract: can bus schematic mcp2551 microchip pic16f877a uart MCP2551 application note can bus schematic mcp2551 example mcp2510 mcp2515 interfacing PIC16F877A with encoder PIC16F877A using temperature sensor pic16f877a based spi MCP2551
    Text: Analog and Interface Product Solutions Interface Products Design Guide Using CAN, LIN and Infrared Connectivity Design ideas in this guide are based on many of the interface devices available from Microchip Technology. A complete device list and corresponding data sheets for these products can be found at www.microchip.com


    Original     		PDF MCP2515 MCP2551 MCP250xx MCP201 MCP23016 PIC12F675 PIC18F6680 MCP2120 MCP2140 MCP215x interfacing pic16f877a with ir sensors can bus schematic mcp2551 microchip pic16f877a uart MCP2551 application note can bus schematic mcp2551 example mcp2510 mcp2515 interfacing PIC16F877A with encoder PIC16F877A using temperature sensor pic16f877a based spi MCP2551

    PIC16F84A Free Projects metal detector

    Abstract: PIC16F628A Free Projects of LED PIC16F84A Free Projects of LED PIC16F877A Free Projects of LED METAL DETECTOR PROGRAM PIC16F84 simple heart rate monitor circuit diagram electronic PIC16F877A code lock project PIC16F876A free projects PIC16F73 Free Projects of interface with lcd PIC16F877A metal detector
    Text: Version 3 PICmicro microcontroller development board An advanced solution for learning and developing PICmicro MCU technology HP488-60-3 matrix multimedia Improvements over version 2 development board include: • USB programmable • Can be powered via USB no need for


    Original     		PDF HP488-60-3 16F88 PIC16F84 outF877, PIC16F87, PIC16F88 PIC18F242, PIC18F248, PIC18F252, PIC18F258, PIC16F84A Free Projects metal detector PIC16F628A Free Projects of LED PIC16F84A Free Projects of LED PIC16F877A Free Projects of LED METAL DETECTOR PROGRAM PIC16F84 simple heart rate monitor circuit diagram electronic PIC16F877A code lock project PIC16F876A free projects PIC16F73 Free Projects of interface with lcd PIC16F877A metal detector

    circuit diagram of LCD connection to pic

    Abstract: 16F877A microcontroller interfacing with lcd PIC16F877A Free Projects of LED PIC16F877A Free Projects of LCD PIC16F877A Free Projects of MATRIX LED i2c 16f877a PIC16F877A Free Projects of LED dot matrix pic16f877a projects flowcode free projects for PIC 16f877A
    Text: E-blocks Bluetooth board Document code: EB024-30-2 Bluetooth board EB024-00-2 Technical datasheet Contents 1. 2. 3. 4. 5. About this document. 2


    Original     		PDF EB024-30-2 EB024-00-2 00809094BA05" circuit diagram of LCD connection to pic 16F877A microcontroller interfacing with lcd PIC16F877A Free Projects of LED PIC16F877A Free Projects of LCD PIC16F877A Free Projects of MATRIX LED i2c 16f877a PIC16F877A Free Projects of LED dot matrix pic16f877a projects flowcode free projects for PIC 16f877A

    PIC16F73 Free Projects of interface with lcd

    Abstract: 16F877A microcontroller interfacing with lcd pic16f877a projects PIC16F877 Free Projects PIC16F877 Free Projects of lcd keyboard lcd display in pic16f73 free projects for PIC 16f877A PIC16F73 programmer circuit diagram PIC16F877A serial port assembly programming interfacing PIC16F877A with lcd
    Text: E-blocksTM USB232 board Document code: EB039-30-1 USB232 board EB039-00-1 Technical datasheet Contents 1. 2. 3. 4. 5. About this document .2


    Original     		PDF USB232 EB039-30-1 EB039-00-1 C16F777 PIC16C745 PIC16F870/1 PIC16C765 PIC16F873/A PIC16C77 PIC16F73 Free Projects of interface with lcd 16F877A microcontroller interfacing with lcd pic16f877a projects PIC16F877 Free Projects PIC16F877 Free Projects of lcd keyboard lcd display in pic16f73 free projects for PIC 16f877A PIC16F73 programmer circuit diagram PIC16F877A serial port assembly programming interfacing PIC16F877A with lcd

    EB-006

    Abstract: EB006
    Text: PICmicro MCU multiprogrammer www.matrixltd.com EB006V9 Contents About this document General information Board layout Circuit description Protective cover PICmicro microcontroller pin out details Bus connections Circuit diagram 2 3 4 5 6 7 8 9 11 Copyright 2014 Matrix TSL


    Original     		PDF EB006V9 EB006V9 40-way EB006-30-9 EB-006 EB006

    control dc motor speed using Pic16F877A

    Abstract: zigbee interfacing c code PIC16F877A advantages zigbee to PIC microcontroller interfacing circuit free pic16f877a interfacing AC motor to pic AN1192 MRF24J40 control dc motor speed using pwm Pic16F877A IGBT PIC MICROCONTROLLER bldc motor using pic16f877a
    Text: Home Appliance Solutions Electronic Solutions for Appliance Designers www.microchip.com/appliance Enabling New Technologies in Appliance Applications Appliance manufacturers are facing numerous challenges in today’s ever-changing global market. Government regulations,


    Original     		PDF Technolo886-3-6578-300 DS00241E DS00241E* control dc motor speed using Pic16F877A zigbee interfacing c code PIC16F877A advantages zigbee to PIC microcontroller interfacing circuit free pic16f877a interfacing AC motor to pic AN1192 MRF24J40 control dc motor speed using pwm Pic16F877A IGBT PIC MICROCONTROLLER bldc motor using pic16f877a

    PIC16F887 Free Projects

    Abstract: PIC18F45k20 examples PIC16F628A Free Projects of LED pwm liquid level alarm using pic16f877a PIC16F877A ultrasonic sensor keypad 4x4 c code for pic16f887 PIC16F72 ups SOURCE CODE PIC16f877a c code for ethernet module enc28j60 RS-485 PIC16f688 example code digital blood pressure circuit using pic
    Text: 8-Bit PIC Microcontrollers Fall 2008 8-bit PIC® Microcontrollers www.microchip.com/8bit Did you know? – Microchip Technology is the #1 supplier of 8-bit microcontrollers worldwide. In fact, we’ve recently surpassed 6 billion devices shipped – That’s one PIC® microcontroller for every person on earth!


    Original     		PDF DS39630F DS39630E* PIC16F887 Free Projects PIC18F45k20 examples PIC16F628A Free Projects of LED pwm liquid level alarm using pic16f877a PIC16F877A ultrasonic sensor keypad 4x4 c code for pic16f887 PIC16F72 ups SOURCE CODE PIC16f877a c code for ethernet module enc28j60 RS-485 PIC16f688 example code digital blood pressure circuit using pic

    pic16f87a

    Abstract: DS39582 pic16f877a full instruction set pic16f877a manual PIC16F877A ARCHITECTURE PIC16F87A7 PIC16F876A programmer circuit diagram PIC16F877AP PIC16f873a example code to config spi PIC16F877a SAMPLE C pwm program
    Text: M PIC16F87XA Data Sheet 28/40-pin Enhanced FLASH Microcontrollers  2001 Microchip Technology Inc. Advance Information DS39582A Note the following details of the code protection feature on PICmicro MCUs. • • • • • • The PICmicro family meets the specifications contained in the Microchip Data Sheet.


    Original     		PDF PIC16F87XA 28/40-pin DS39582A PIC16F877A-I/L PIC16F877AI/ML PIC16F877AI/P PIC16F877AI/PT PIC16F877AT44 pic16f87a DS39582 pic16f877a full instruction set pic16f877a manual PIC16F877A ARCHITECTURE PIC16F87A7 PIC16F876A programmer circuit diagram PIC16F877AP PIC16f873a example code to config spi PIC16F877a SAMPLE C pwm program

    PIC16f873a example code to config spi

    Abstract: PIC16F876A free projects PIC16F877a parallel slave port sample code pic16f87a PIC16F876A programmer circuit diagram pic16f877a minimal config 16lf87 pic16f877a projects PIC16F877A Microcontroller PWM GENERATION using Pic16F877A
    Text: M PIC16F87XA Data Sheet 28/40-pin Enhanced FLASH Microcontrollers  2001 Microchip Technology Inc. Advance Information DS39582A Note the following details of the code protection feature on PICmicro MCUs. • • • • • • The PICmicro family meets the specifications contained in the Microchip Data Sheet.


    Original     		PDF PIC16F87XA 28/40-pin DS39582A D-81739 DS39582A-page PIC16f873a example code to config spi PIC16F876A free projects PIC16F877a parallel slave port sample code pic16f87a PIC16F876A programmer circuit diagram pic16f877a minimal config 16lf87 pic16f877a projects PIC16F877A Microcontroller PWM GENERATION using Pic16F877A

    PIC16F876A free projects

    Abstract: No abstract text available
    Text: PIC16F87XA Data Sheet 28/40/44-Pin Enhanced Flash Microcontrollers  2003 Microchip Technology Inc. DS39582B Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF PIC16F87XA 28/40/44-Pin DS39582B DK-2750 D-85737 NL-5152 PIC16F876A free projects

    PIC16F87XA

    Abstract: f87xa 16F873A small servo motor control pic16f876a pic16f877a projects PIR SENSOR free download pic 16f87xa datasheet PIC16F876A free projects interfacing of PIC16F877A with 2X16 lcd pic16f877A full instruction set PIC16f873a example code to config spi
    Text: PIC16F87XA Data Sheet 28/40/44-Pin Enhanced Flash Microcontrollers  2003 Microchip Technology Inc. DS39582B Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF PIC16F87XA 28/40/44-Pin DS39582B DK-2750 D-85737 NL-5152 PIC16F87XA f87xa 16F873A small servo motor control pic16f876a pic16f877a projects PIR SENSOR free download pic 16f87xa datasheet PIC16F876A free projects interfacing of PIC16F877A with 2X16 lcd pic16f877A full instruction set PIC16f873a example code to config spi

    square Wave Generator using pic16f877a

    Abstract: what is f and a in PIC 16 F 877A 16F873A pic16f877a full instruction set pic16f877a projects PIR SENSOR PIC18F87XA PIC16F877a SAMPLE C ir sensor counter program PIC16F877a SAMPLE C pwm program interfacing pic16f877a with speaker PIC16F877A metal detector
    Text: PIC16F87XA 28/40/44-Pin Enhanced Flash Microcontrollers Devices Included in this Data Sheet: • PIC16F873A • PIC16F874A Analog Features: • 10-bit, up to 8-channel Analog-to-Digital Converter A/D • Brown-out Reset (BOR) • Analog Comparator module with:


    Original     		PDF PIC16F87XA 28/40/44-Pin PIC16F873A PIC16F874A PIC16F876A PIC16F877A 10-bit, of78-366 DS39582C-page square Wave Generator using pic16f877a what is f and a in PIC 16 F 877A 16F873A pic16f877a full instruction set pic16f877a projects PIR SENSOR PIC18F87XA PIC16F877a SAMPLE C ir sensor counter program PIC16F877a SAMPLE C pwm program interfacing pic16f877a with speaker PIC16F877A metal detector

    PIC16f873a example code to config spi

    Abstract: 16F873A pic16f877A full instruction set pic16f877a manual PIC 877A pic16f877a projects PIR SENSOR DS39582B PIC16F877A PIN diagram and its in pd PWM GENERATION using Pic16F877A PIC16F877A lcd keypad interfacing
    Text: PIC16F87XA Data Sheet 28/40/44-Pin Enhanced Flash Microcontrollers  2003 Microchip Technology Inc. DS39582B Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF PIC16F87XA 28/40/44-Pin DS39582B DK-2750 D-85737 NL-5152 PIC16f873a example code to config spi 16F873A pic16f877A full instruction set pic16f877a manual PIC 877A pic16f877a projects PIR SENSOR DS39582B PIC16F877A PIN diagram and its in pd PWM GENERATION using Pic16F877A PIC16F877A lcd keypad interfacing

    3 phase pwm pic16f877

    Abstract: 1X16 lcd module pic16f877a based spi sm 0038 ir receiver lcd 2*16 Side Brazed Ceramic Dual-In-Line Packages 28 One-chip telephone IC audio Amp. mosfet 1000 watt 400 Watt Audio amplifier IC control dc motor using Pic16F877A
    Text: PRODUCT LINE CARD INCLUDING DEVELOPMENT TOOLS 2ND HALF 2003 MOST CURRENT VERSION AVAILABLE ON WWW.MICROCHIP.COM WWW.MICROCHIP.COM Product Profile PICmicro Microcontrollers Microchip’s PICmicro® family of microcontrollers combine high performance, low cost and small package size to offer the best


    Original     		PDF DS00148H3 3 phase pwm pic16f877 1X16 lcd module pic16f877a based spi sm 0038 ir receiver lcd 2*16 Side Brazed Ceramic Dual-In-Line Packages 28 One-chip telephone IC audio Amp. mosfet 1000 watt 400 Watt Audio amplifier IC control dc motor using Pic16F877A

    PIC16f690 example codes

    Abstract: PIC18f4520 enc28j60 spi example codes PIC18f4431 PWM example codes PIC16f877a example code spi master configuration PIC16f876 example codes PIC18f4520 PWM example codes RF transmitter 433.92 3 pin 12v PIC16f877a example uart codes PIC16F84 example codes picdem 2 plus demo board pic18f4520 examples
    Text: 1st Half 2005 January - March 2005 Product Selector Guide Product Profile PICmicro Microcontrollers Microchip’s PICmicro® family of microcontrollers combine high performance, low cost and small package size to offer the best price/ performance ratio in the industry. Based on a powerful RISC core, the PICmicro architecture provides users an easy migration path


    Original     		PDF DS00148K1 PIC16f690 example codes PIC18f4520 enc28j60 spi example codes PIC18f4431 PWM example codes PIC16f877a example code spi master configuration PIC16f876 example codes PIC18f4520 PWM example codes RF transmitter 433.92 3 pin 12v PIC16f877a example uart codes PIC16F84 example codes picdem 2 plus demo board pic18f4520 examples