> ## Documentation Index
> Fetch the complete documentation index at: https://nominal-instro-524-sw-timed-background-daemon.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# build an InstroPSU from a JSON config file

```python psu_config.py theme={null}
"""Example: build an InstroPSU from a JSON config file.

Run:
    uv run python examples/psu/psu_config.py
"""

from pathlib import Path

from instro.psu import InstroPSU

# Swap this for psu_config_bk9115.json or psu_config_rigol_dp800.json (after editing
# their visa_resource) to run against real hardware instead of the simulator.
CONFIG_PATH = Path(__file__).parent / "psu_config_simulated.json"


def main() -> None:
    with InstroPSU(config=CONFIG_PATH) as psu:
        voltage = psu.get_voltage(channel=1)
        current = psu.get_current(channel=1)
        print(f"{psu.name}: {voltage.latest:.3f}V, {current.latest:.3f}A")


if __name__ == "__main__":
    main()
```