Waypoint Mentor

Circuits worked through node by node.

Circuit analysis is a method: label the currents, write KCL and KVL, solve. The tutor goes through it with you on the whiteboard, explains what each component is doing, and checks the answer with a quick power balance.

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Free AI electrical engineering tutor, by voice and chat. No card needed.

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How long does a capacitor take to charge through a 10 kΩ resistor?
It depends on the time constant τ = RC. After one τ it's at 63%, and after about 5τ it's effectively full.
‹›RC Charging
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With R=10R = 10 kΩ and C=100C = 100 µF:

τ=RC=(10×103)(100×10−6)=1 s\tau = RC = (10 \times 10^3)(100 \times 10^{-6}) = 1\ \text{s}

VC(t)=Vs(1−e−t/τ)V_C(t) = V_s\left(1 - e^{-t/\tau}\right)

TimeVC/VsV_C / V_s
1τ1\tau63%
3τ3\tau95%
5τ5\tau99.3%

How the electrical engineering tutor helps

A method you can repeat

Every circuit is solved with the same labelled steps, so you can do the next one alone.

Time constants made visible

Charging curves and phasor diagrams show what the equations predict.

Sanity checks

It checks answers with power balances and limiting cases, the way an engineer would.

Electrical Engineering topics it covers

  • Ohm's law and resistor networks
  • Kirchhoff's laws
  • Nodal and mesh analysis
  • Thevenin and Norton equivalents
  • RC and RL transients
  • AC circuits and phasors
  • Op-amp circuits
  • Filters and Bode plots

Not on the list? Ask anyway: it covers any electrical engineering topic, and on Plus it answers from your own uploaded course notes.

How a session works

  1. 1.

    Ask out loud or type

    Press Start talking and talk like you would to a tutor, or type your question. You can interrupt it any time.

  2. 2.

    Watch it on the whiteboard

    The working appears one step at a time. Say "yes" to move on, or ask for a step to be explained another way.

  3. 3.

    Check you've got it

    It ends with a quick question to check, and remembers what you found hard for next time.

Questions about the AI electrical engineering tutor

Can I talk to it out loud?

Yes. Press Start talking and just talk, like a call with a tutor. You can interrupt it mid-sentence, and it puts the working on a whiteboard while it explains. Free accounts get 10 voice minutes a month, with no card needed.

Can it help with AC circuit analysis?

Yes, with phasors, impedance, power factor and resonance, worked step by step with diagrams.

Does it cover op-amps?

Yes: inverting, non-inverting, summing and comparator circuits, using the ideal op-amp rules.

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10 voice minutes and 20 messages a month on the free plan. No card needed.

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