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The link below has the most information about tips and tricks using PIC micro-controllers. The attachment is a smaller version that has only a portion of the information. The linked file was too large to attach, at a little over 5mb.

http://www.dt.picbasic.co.uk/uploads/01146B.pdf

It contains the following Tips:
8-pin Flash PIC® Microcontroller Tips ‘n Tricks CHAPTER 1

TIPS ‘N TRICKS WITH HARDWARE
TIP #1: Dual Speed RC Oscillator................. 1-2
TIP #2: Input/Output Multiplexing................... 1-2
TIP #3: Read Three States From One Pin..... 1-3
TIP #4: Reading DIP Switches....................... 1-3
TIP #5: Scanning Many Keys With One Input... 1-4
TIP #6: Scanning Many Keys and Wake-up From Sleep... 1-4
TIP #7: 8x8 Keyboard with 1 Input................. 1-5
TIP #8: One Pin Power/Data.......................... 1-5
TIP #9: Decode Keys and ID Settings........... 1-6
TIP #10: Generating High Voltages................. 1-6
TIP #11: Vdd Self Starting Circuit.................... 1-7
TIP #12: Using PIC® MCU A/D For Smart Current Limiter................................... 1-7
TIP #13: Reading A Sensor With Higher Accuracy.......................................... .. 1-8
TIP #13.1: Reading A Sensor With Higher Accuracy – RC Timing Method.......... 1-8
TIP #13.2: Reading A Sensor With Higher Accuracy – Charge Balancing Method. 1-10
TIP #13.3: Reading A Sensor With Higher Accuracy – A/D Method..................... 1-11
TIP #14: Delta Sigma Converter...................... 1-11

TIPS ‘N TRICKS WITH SOFTWARE
TIP #15: Delay Techniques.............................. 1-12
TIP #16: Optimizing Destinations..................... 1-13
TIP #17: Conditional Bit Set/Clear................... 1-13
TIP #18: Swap File Register with W................ 1-14
TIP #19: Bit Shifting Using Carry Bit................ 1-14

PIC® Microcontroller Low Power Tips ‘n Tricks
GENERAL LOW POWER TIPS ‘N TRICKS
TIP #1 Switching Off External Circuits/Duty Cycle.... 2-2
TIP #2 Power Budgeting......................................... 2-3
TIP #3 Configuring Port Pins.................................. 2-4
TIP #4 Use High-Value Pull-Up Resistors............... 2-4
TIP #5 Reduce Operating Voltage.......................... 2-4
TIP #6 Use an External Source for CPU Core Voltage... 2-5
TIP #7 Battery Backup for PIC MCUs .................... 2-6

DYNAMIC OPERATION TIPS ‘N TRICKS
TIP #8 Enhanced PIC16 Mid-Range Core.............. 2-6
TIP #9 Two-Speed Start-Up.................................... 2-7
TIP #10 Clock Switching......................................... .. 2-7
TIP #11 Use Internal RC Oscillators......................... 2-7
TIP #12 Internal Oscillator Calibration...................... 2-8
TIP #13 Idle and Doze Modes.................................. 2-8
TIP #14 Use NOP and Idle Mode............................... 2-9
TIP #15 Peripheral Module Disable (PMD) Bits........... 2-9
TIP #16 Deep Sleep Mode.......................................2-10
TIP #17 Extended WDT and Deep Sleep WDT...........2-10
TIP #18 Low Power Timer1 Oscillator and RTCC.....2-10
TIP #19 Low Power Timer1 Oscillator Layout...........2-11
TIP #20 Use LVD to Detect Low Battery...................2-11
TIP #21 Use Peripheral FIFO and DMA...................2-11
TIP #22 Ultra Low-Power Wake-Up Peripheral....2-12

PIC® Microcontroller CCP and ECCP Tips ‘n Tricks
CAPTURE TIPS ‘N TRICKS
TIP #1: Measuring the Period of a Square Wave.... 3-3
TIP #2: Measuring the Period of a Square Wave with Averaging.... 3-3
TIP #3: Measuring Pulse Width............................... 3-4
TIP #4: Measuring Duty Cycle................................. 3-4
TIP #5: Measuring RPM Using an Encoder............. 3-5
TIP #6: Measuring the Period of an Analog Signal.. 3-6

COMPARE TIPS ‘N TRICKS
TIP #7: Periodic Interrupts....................................... 3-8
TIP #8: Modulation Formats.................................... 3-9
TIP #9: Generating the Time Tick for a RTOS.........3-10
TIP #10: 16-Bit Resolution PWM...............................3-10
TIP #11: Sequential ADC Reader..............................3-11
TIP #12: Repetitive Phase Shifted Sampling.............3-12

PWM TIPS ‘N TRICKS
TIP #13: Deciding on PWM Frequency.....................3-14
TIP #14: Unidirectional Brushed DC Motor Control Using CCP...3-14
TIP #15: Bidirectional Brushed DC Motor Control Using ECCP...3-15
TIP #16: Generating an Analog Output......................3-16
TIP #17: Boost Power Supply....................................3-17
TIP #18: Varying LED Intensity..................................3-18
TIP #19: Generating X-10 Carrier Frequency............3-18

COMBINATION CAPTURE AND COMPARE TIPS
TIP #20: RS-232 Auto-baud.......................................3-19
TIP #21: Dual-Slope Analog-to-Digital Converter......3-21

PIC® Microcontroller Comparator Tips ‘n Tricks
TIP #1: Low Battery Detection................................. 4-2
TIP #2: Faster Code for Detecting Change............. 4-3
TIP #3: Hysteresis........................................ ........... 4-4
TIP #4: Pulse Width Measurement.......................... 4-5
TIP #5: Window Comparison................................... 4-6
TIP #6: Data Slicer............................................ ....... 4-7
TIP #7: One-Shot.............................................. ....... 4-8
TIP #8: Multi-Vibrator (Square Wave Output).......... 4-9
TIP #9: Multi-Vibrator (Ramp Wave Output)............4-10
TIP #10: Capacitive Voltage Doubler.........................4-11
TIP #11: PWM Generator......................................... .4-12
TIP #12: Making an Op Amp Out of a Comparator....4-13
TIP #13: PWM High-Current Driver...........................4-14
TIP #14: Delta-Sigma ADC........................................4-15
TIP #15: Level Shifter........................................... .....4-16
TIP #16: Logic: Inverter.......................................... ...4-16
TIP #17: Logic: AND/NAND Gate..............................4-17
TIP #18: Logic: OR/NOR Gate..................................4-18
TIP #19: Logic: XOR/XNOR Gate..............................4-19
TIP #20: Logic: Set/Reset Flip Flop...........................4-20

PIC® Microcontroller DC Motor Control Tips ‘n Tricks
TIP #1: Brushed DC Motor Drive Circuits................ 5-2
TIP #2: Brushless DC Motor Drive Circuits.............. 5-3
TIP #3: Stepper Motor Drive Circuits....................... 5-4
TIP #4: Drive Software.......................................... ... 5-6
TIP #5: Writing a PWM Value to the CCP Registers with a Mid-Range PIC® MCU...... 5-7
TIP #6: Current Sensing.......................................... 5-8
TIP #7: Position/Speed Sensing.............................. 5-9
Application Note References........................................ ..5-11
Motor Control Development Tools..................................5-11

LCD PIC® Microcontroller Tips ‘n Tricks
TIP #1: Typical Ordering Considerations and Procedures for Custom Liquid Displays...... 6-2
TIP #2: LCD PIC® MCU Segment/Pixel Table........ 6-2
TIP #3: Resistor Ladder for Low Current............... 6-3
TIP #4: Contrast Control with a Buck Regulator...... 6-5
TIP #5: Contrast Control Using a Boost Regulator... 6-5
TIP #6: Software Controlled Contrast with PWM for LCD Contrast Control............ 6-6
TIP #7: Driving Common Backlights........................ 6-7
TIP #8: In-Circuit Debug (ICD)................................. 6-8
TIP #9: LCD in Sleep Mode..................................... 6-8
TIP #10: How to Update LCD Data through Firmware..... 6-9
TIP #11: Blinking LCD............................................... 6-9
TIP #12: 4 x 4 Keypad Interface that Conserves Pins for LCD Segment Drivers....6-10
Application Note References........................................ ..6-11

Intelligent Power Supply Design Tips ‘n Tricks
TIP #1: Soft-Start Using a PIC10F200..................... 7-2
TIP #2: A Start-Up Sequencer................................. 7-3
TIP #3: A Tracking and Proportional Soft-Start of Two Power Supplies................ 7-4
TIP #4: Creating a Dithered PWM Clock................. 7-5
TIP #5: Using a PIC® Microcontroller as a Clock Source for a SMPS PWM Generator.......... 7-6
TIP #6: Current Limiting Using the MCP1630.......... 7-7
TIP #7: Using a PIC® Microcontroller for Power Factor Correction............................. 7-8
TIP #8: Transformerless Power Supplies................ 7-9
TIP #9: An IR Remote Control Actuated AC Switch for Linear Power Supply Designs....7-10
TIP #10: Driving High Side FETs...............................7-11
TIP #11: Generating a Reference Voltage with a PWM Output............................................ ....7-12
TIP #12: Using Auto-Shutdown CCP.........................7-13
TIP #13: Generating a Two-Phase Control Signal.....7-14
TIP #14: Brushless DC Fan Speed Control...............7-15
TIP #15: High Current Delta-Sigma Based Current Measurement Using a Slotted Ferrite and Hall Effect Device.........7-16
TIP #16: Implementing a PID Feedback Control in a PIC12F683-Based SMPS Design........7-17
TIP #17: An Error Detection and Restart Controller..7-18
TIP #18: Data-Indexed Software State Machine.......7-19
TIP #19: Execution Indexed Software State Machine....7-20
TIP #20: Compensating Sensors Digitally.................7-21
TIP #21: Using Output Voltage Monitoring to Create a Self-Calibration Function.....7-22

3V Tips ‘n Tricks
TIP #1: Powering 3.3V Systems From 5V Using an LDO Regulator... 8-3
TIP #2: Low-Cost Alternative Power System Using a Zener Diode... 8-4
TIP #3: Lower Cost Alternative Power System Using 3 Rectifier Diodes.... 8-4
TIP #4: Powering 3.3V Systems From 5V Using Switching Regulators... 8-5
TIP #5: 3.3V → 5V Direct Connect.......................... 8-6
TIP #6: 3.3V → 5V Using a MOSFET Translator..... 8-6
TIP #7: 3.3V → 5V Using A Diode Offset................. 8-7
TIP #8: 3.3V → 5V Using A Voltage Comparator..... 8-8
TIP #9: 5V → 3.3V Direct Connect.......................... 8-9
TIP #10: 5V → 3.3V With Diode Clamp..................... 8-9
TIP #11: 5V → 3.3V Active Clamp.............................8-10
TIP #12: 5V → 3.3V Resistor Divider........................8-10
TIP #13: 3.3V → 5V Level Translators......................8-12
TIP #14: 3.3V → 5V Analog Gain Block....................8-13
TIP #15: 3.3V → 5V Analog Offset Block...................8-13
TIP #16: 5V → 3.3V Active Analog Attenuator...........8-14
TIP #17: 5V → 3V Analog Limiter..............................8-15
TIP #18: Driving Bipolar Transistors..........................8-16
TIP #19: Driving N-Channel MOSFET Transistors....8-18