After looking at many MPLAB ICD2 online debuggers on the Internet, I made the current ICD2 after sorting it out. It is based on the ICD2.5 version circuit and uses some special components. Features: Dual crystal oscillator, a large number of self-restoring fuses, 5.1V voltage regulator tube, using DG411 reset circuit non-7407 like the original ICD2 to ensure stable high and low voltage programming, DC IN 5V 1A auxiliary power supply, MC34063, special component programming data buffer SN74LVC1T45 (Better than 74HC125+74HC126) Line production instructions:
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