Miniscope v2f

Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller - variant of miniscope v2e with input amplifier (MCP6S21 PGA) added. This is minor update, but input PGA fixes problem with input leakage of STM32F042 allowing increasing input impedance at the same time.

Quick specification

BOM

Retail prices are from my local distributor, YMMV but listed prices are rather in top range.

Schematic: miniscope_v2f.pdf
miniscope v2e schematic
miniscope v2e schematic
Note: 3.3V voltage regulator can be used as well. It would change voltage ranges which may be compensated either by using software calibration function in GUI or recompiling DLL with changed fBasicSens value.
Eagle files: miniscope_v2f_eagle.zip
"Panelized" PCB printout for toner etching: miniscope_v2f_pcb_panelized.pdf
miniscope v2f PCB (Eagle)
PCB
PCB
PC GUI
Firmware (Keil): miniscope_v2f_firmware.zip
DLL for miniscope v4: miniscope_v2f_dll.zip
Basic binaries in single archive (GUI + DLL + FW): miniscope_v2f_bin.7z

Big thanks to electronics-lab.com for featuring this project (as well as previous versions).


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