Jonathan’s PPMScope is a do-it-yourself oscilloscope design with a maximum sample rate of 1 MHz (bandwidth of 500 kHz). The hardware is based on the PIC16F877A Microcontroller.The hardware design includes a 50 Watt power supply (+12,-12,+5 Volts.The human interface to the oscilloscope is both a part of the box (knobs, switches, etc) and through a PC program written in C for Windows.