Actions
Forum Thread Details
  • Replies 66 replies
  • Subscribers 614 subscribers
  • Views 4850 views
  • Users 0 members are here
Related

ChatGPT designs an Audio Amplifier

scottiebabe

It is getting smarter every day, the schematic made me smile.

You said:
draw a schematic of circuit
ChatGPT said:
ChatGPT

Could you clarify what type of circuit you'd like? For example:

  1. Type of Circuit: Oscillator, amplifier, power supply, etc.
  2. Specific Components: Op-amp, microcontroller, 555 timer, etc.
  3. Voltage Levels: Supply voltage and expected output.
  4. Purpose: Any specific functionality you'd like to achieve.

Let me know, and I can create a schematic tailored to your needs!

You said:
audio amplifier
ChatGPT said:
ChatGPT

Here’s a simple schematic for a basic audio amplifier using a common operational amplifier like the LM386, which is popular for audio applications:

Components:

  1. IC: LM386
  2. ...
  3. Power Supply: 9V DC

Circuit Description:

  1. Input: Audio signal is fed through a coupling capacitor (C1) to remove any DC component.
  2. ...
  3. Decoupling: A capacitor (C3) filters noise in the power supply.

Would you like me to refine this or provide the actual schematic drawing?

You said:
actual drawing
ChatGPT said:
image

Here is the schematic diagram of the simple audio amplifier circuit using the LM386 IC. Let me know if you need any modifications or additional details!

  • in reply to scottiebabe

    I just tried KIMI. Looks like it went to a local creche for help... mind you, it reminded me of my college text books.

    image

    It did provide a written explanation:

    Circuit Design Explanation

    Gain Setting (46 dB / 200×) The LM386 has a default gain of 20 (26 dB). To achieve the maximum gain of 200 (46 dB), C2 (10 µF) is connected between pins 1 and 8. This bypasses the internal 1.35 kΩ feedback resistor, raising the gain to the maximum value
    .
    Power Input (J2)
    • +12V DC connects to pin 6 (V+) through the supply rail
    • C3 (100 µF) provides power supply decoupling near the IC to prevent noise and oscillation
    • LED1 with R2 (1 kΩ) serves as a power-on indicator
    Audio Input (J1)
    • Uses a standard 3.5 mm stereo jack (Tip = Left, Ring = Right, Sleeve = Ground)
    • VR1 (10 kΩ potentiometer) provides volume control
    • C1 (10 µF) is the input coupling capacitor, blocking DC while passing the audio signal to pin 3 (+Input)
    • C7 (0.1 µF) from pin 2 (–Input) to ground is critical for high-gain stability — the TI datasheet specifically recommends bypassing the unused input when running at 46 dB gain to prevent instability and gain degradation
    Output Stage
    • C4 (470 µF) is the output coupling capacitor. It blocks the DC bias (Vcc/2 ≈ +6V) present at pin 5 and passes only the AC audio signal to the speaker. With an 8 Ω load, this gives a low-frequency cutoff around 42 Hz.
    • R1 (10 Ω) + C6 (0.05 µF) form a Zobel network from pin 5 to ground. This prevents high-frequency oscillation and improves stability with inductive speaker loads
      .
    • J3 is the 2-pin speaker connector for your 8 Ω speaker.
    Stability Components
    • C5 (10 µF) on pin 7 (Bypass) improves power supply rejection and reduces hum/noise, which is especially important at high gain settings.
  • in reply to scottiebabe

    nice try but no cigar

    The bad thing is that might almost work, the volume control mis-wiring will shunt the source impedance to ground by  0 -10k, so if you have a source impedance of, for example, 1k - then it will sort of work.

    (Caution - - there may be other errors that I missed)

    If you tested the volume control only at max and min (and wire it the wrong way round) it will appear to work.

    My understanding is that AI software is  a bit like this - it hammers junk though tests until something that passes all the tests is made  - but who knows what it will do in the untested cases.

    But thanks for keeping track of it for us !

    MK

  • ChatGPT: May 29, 2026. Getting closer...

    image

  • in reply to misaz

    Ah yes, maglev electrolytics. If you are not using them in your designs you are 100% missing out

  • in reply to scottiebabe

    image

    Is it just hovering over the breadboard ? do we have this technology ?

  • in reply to michaelkellett

    a mini potentiometric flux capacitor ...obviously ....  Relaxed

  • in reply to dougw

    And what is the blue and white thing ?

    MK

  • in reply to michaelkellett

    I only see 3 components that might  be properly inserted into the breadboard, although none are in the correct position. non-existent chip, idiotic component values and is that a relay?