The hardware’s dead simple a 38 kHz IR receiver does the heavy lifting by filtering out errant infrared light. He built an IR receiver board for the PICkit 2 and figured out how to use some of the Microchip software to measure the timing of the incoming signal. The pull up resistor must be sued with MCLR pin and don't use very low value, as it will draw unnecessary current and will result in degradation in power efficiency.Needed to figure out the coding scheme used by an IR remote control so that he could use it with his own project. So you will mostly leave this pin unconnected in most of the 5v PIC micro controllers as it is a special feature of the PICkit3 for programming the 3.3v logic level micro controllers. PGM pin as said earlier is used for low voltage programming. The programmer has built in feature of high voltage suppression. The PICkit3 is an ICSP device which is a protected device so don't worry about conecting the power supply pin of the controller to the chip. After building the project click the "Run Project' (as shown in the figures below) and this will take a few seconds you will see multiple lights blinking and if every thing goes perfect your firmware will be programmed into the microcontroller. Before you burn the program, it's a good practice to build the project and see if there are any errors or warnings in the code. First make sure that the programmer is connected to the pc and is active, after that go to the MPLAB ide, write your favorite code in it.
To use PICkit3 as I mentioned earlier you must be using an MPLAB ide with any compiler of your choice like C18, XC8 etc.
It's to burn something to the micrcontroller (I mean to program!). Now that you have completed the physical connections. Please note the pull up resistor that it must be connected properly and the resistance values can be 10k or above. The following diagram shows the necessary connections that must be made between the two devices. PGM is Low Voltage Enable Pin (LVP) used for micro controllers with low voltage levels like 3.3v It provides the clock signal for synchronized communication. PGC pin severs the clock between the PICkit3 and the the corresponding PIC device. This pin serves as connection between the microcontroller and the programmer for data transmission. PGD this must be connected to the PGD pin on the target dvice. VSS pin is connected to micro controller ground, simple as that. VDD pin is connected to the power pin of the mcirocontroller also called VDD, This is very important your target device must be connected to it's own power supply, PICkit3 uses the VDD pin to read the voltage level for communication. PICkit3 uses this pin for resetting the target device. Normally this pin is connected to a pull up resistor to keep the microcontroller from resetting. So when a LOW pulse is applied to this pin the processor will reset terminating all activities an starting the program from beginning.
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