# DPScope — Build Your Own USB/PC-Based Oscilloscope

Source: DPScope, an open-hardware USB oscilloscope/logic-analyzer kit
(dpscope.freevar.com; also documented as an Instructables build,
"DPScope - Build Your Own USB/PC-Based Oscilloscope").

Overview: a two-channel digital storage oscilloscope built around a single
dsPIC30F2020 microcontroller (DIP-28), which integrates the ADC, sample
logic, trigger control, and memory. Signals reach the PC over USB via an
FTDI USB-to-serial converter cable. The analog front end is built from
discrete passives (resistor dividers/attenuators) with 1N914A fast diodes
clamping the inputs for protection, a 16 MHz ceramic resonator clocking the
MCU, and BNC-to-microhook probe connectors. Enclosure/mechanical hardware
and probe accessories round out the kit. Bandwidth is roughly 1.3 MHz with
sampling up to 20 Msps.

Included reference files:
- `assembly_guide.pdf` — official step-by-step build guide (34 pages)
- `schematic_v1_3.pdf` — full circuit schematic
- `components.html` — vendor bill of materials (DigiKey part numbers,
  quantities, values) exported from the project's parts spreadsheet
- `user_manual.pdf` — operating manual (software/firmware version info,
  not needed for sourcing but included for completeness)

Sourcing note: `dsPIC30F2020` is listed with vendor "DPScope.com" (i.e. it
ships in the official kit rather than being a generic DigiKey stock part) —
worth flagging if a distributor substitute is needed for independent
sourcing.