This circuit looks to be the same basic underlying Pickit 3 circuit, but with some “faking” of inputs to mimic missing circuitry. Above that are a couple of voltage dividers that mimic the programming and target mcu voltages, and above that are the target MCU clock and Data lines. To the right of that is a transistor that controls the target MCU master-clear line. Just above that and to the right is the target MCU programming header. Working our way down we see the main MCU the PIC24FJ256GB106 – and it’s programming header to the left, and below that is the USB Mini-B connector and the 3.3V regulator. In the top left of the schematic is the 25LC256 EEPROM. Here is a link to a PDF of the schematic: PDF Schematic Knowing this – I decided to see what I could do to remove the circuitry I didn’t need, yet still have a functioning programmer/debugger.Īfter a little research and looking at what Microchip had done with their starter kits, I arrived at the following schematic, which is based on their Pickit On-Board: I also have no real need for programming on the go, or even to provide power to the target MCU to program. For instance – I primarily use the newer 3.3V PIC32 processors, so I really don’t need the ability to alter the voltage like the standard Pickit 3 can. It works well, but I have often wondered just how little of its circuitry was needed to program and debug the boards I make. Previously, I made a Pickit 3 clone – (See previous Blog Post). Pic10f series microcontroller based Project List of PDF.Pic16f72 microcontroller based Project List of PDF.
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