AI Electronics Lab

Public demo experiment · production beta

RC Low-Pass Filter at 1 kHz

A small example of the lab workflow: natural-language request, circuit model, simulation plot, explanation, assumptions, and caveats.

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Human request

Build and simulate a 1 kHz RC low-pass filter.

Prompt: Simulate a 1 kHz RC low-pass filter and return the schematic plus plot.

Clarified simulation goal

First-order AC response

Create a simple first-order RC low-pass filter with a nominal cutoff frequency near 1 kHz, run an AC frequency response simulation, and show the magnitude response.

Circuit model

Nominal model

R1

1.59 kΩ

C1

100 nF

Target cutoff

Approximately 1 kHz

Formula

fc = 1 / (2πRC)

A first-order RC low-pass filter: input → resistor → output node, with capacitor from output node to ground.

artifact: rc_low_passR=1591.55Ω C=100nF fc=1000Hz · 2026-05-27

The response is flat at low frequencies (≈0 dB) and starts rolling off around the nominal cutoff frequency. Generated from ngspice AC analysis — no placeholder data.

artifact: rc_low_passbeta_afc96d82971d4ff3 · ngspice AC analysis · fc≈1000Hz · 160 points/decade · 2026-05-27

What the plot means

Low frequencies pass; high frequencies are attenuated

At low frequencies, the capacitor has high impedance, so most of the signal appears at the output. As frequency increases, the capacitor provides a lower-impedance path to ground, reducing the output amplitude. Around the cutoff frequency, the output is approximately 3 dB below the low-frequency level in the ideal first-order AC model.

Simulation assumptions

Ideal resistor and capacitor.
Ideal signal source.
No parasitic capacitance or inductance.
No capacitor ESR/ESL.
No tolerance spread.
No temperature effects.
AC analysis only.

Real-world caveats

This simulation does not prove that a real circuit will behave exactly the same. Real components have tolerances, capacitor ESR/ESL, parasitic effects, temperature drift, and measurement loading. A more honest next experiment would include tolerance analysis or comparison with real measurements.

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What-if ideas

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Artifacts

GitHub-ready evidence bundle

Schematic image: pipeline-generated SVG — R=1591.55Ω, C=100nF, fc=1000Hz
Frequency response plot: ngspice AC analysis SVG — 10 Hz to 1 MHz sweep
Source artifact job: beta_afc96d82971d4ff3 (rc_low_pass · 2026-05-27)
SPICE netlist: from pipeline
Markdown report: from pipeline

Agent/team note

Generated by the Product Lab Worker workflow style and reviewed for public-safe claims and caveats. This production page is generated from the reviewed and human-approved workflow.