RPG

RPG delivers visual stimuli using Raspberry Pi 3 and 4 hardware for synchronized, high-frame-rate stimulus presentation in visual neuroscience experiments.

Key Features:

• High frame-rate output: Capable of delivering visual stimuli at rates exceeding 60 frames per second for smooth stimulus presentation.
• Real-time timing feedback: Reports stimulus timing with accuracy on the order of tens of microseconds to support precise temporal synchronization.
• Stimulus repertoire: Python interface supports generation and presentation of drifting sine wave gratings, Gabor patches, raw images, and videos.
• Triggering and synchronization: Accepts 3.3-volt external trigger signals or operates free-running and provides a 3.3V output on each frame presentation for device synchronization.
• Hardware platform and interface: Runs on Raspberry Pi 3 and 4 and uses general-purpose input/output (GPIO) pins for triggering and feedback.

Scientific Applications:

• Visual neuroscience experiments: Presentation of controlled visual stimuli to evoke and measure neural activity in studies of visual processing.
• Multimodal recordings synchronization: Synchronizes stimulus delivery with neural recording modalities such as high-density silicon probes and 2-photon imaging.

Methodology:

Implemented in Python on the Raspberry Pi platform and using the device's general-purpose input/output pins for triggering and feedback mechanisms.