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Diode-Bridge Voltage-Controlled Attenuator

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by John Lauer

Two-layer through-hole audio attenuator: four 1N4148s as a current-biased shunt bridge, 0 to 2 V control, designed by Saif Abdessayed with Adom Hydrogen

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diode-vca-attenuator / tools / run_bridge_check.py
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John Lauer Saif Abdessayed's diode-bridge VCA: KiCad project, Gerbers, BOM, simulations, reports, and the earlier RC filter test 45f3ff6 11d ago
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#!/usr/bin/env python3
"""Run one attributed KiCad Bridge verb and retain the exact JSON reply."""

from __future__ import annotations

import json
from pathlib import Path
import subprocess
import sys


def main() -> int:
    if len(sys.argv) != 4:
        raise SystemExit("usage: run_bridge_check.py VERB JSON OUTPUT")
    verb, args, output = sys.argv[1:]
    json.loads(args)
    command = [
        "adom-bridge",
        "--target",
        "DESKTOP-KTQA53E",
        "--ai-thread",
        "Analog VCA KiCad project",
        verb,
        args,
    ]
    result = subprocess.run(command, text=True, capture_output=True, timeout=360)
    report = result.stdout
    if result.stderr:
        report += "\n--- stderr ---\n" + result.stderr
    Path(output).write_text(report, encoding="utf-8")
    print(report)
    return result.returncode


if __name__ == "__main__":
    raise SystemExit(main())