Here’s a concise, practical guide to ( .stim ), commonly used for electrical stimulation parameters in neurostimulation, rehabilitation, and research (e.g., with devices like multichannel stimulators or TMS). 1. What Is a Stim File? A .stim file stores time‑varying stimulation parameters – typically amplitude, pulse width, frequency, and electrode channels. It allows reproducible, automated stimulation sequences. 2. Typical Format (Example) Most stim files are plain text, CSV-like, or JSON. A common structure (tabular):