E-CodeThevenin equivalent and maximum power — a TI-84 Plus CE program
THEVEN is a TI-BASIC program for the TI-84 Plus CE. A source V with R1 in series, R2 across, and R3 out to the terminals: the Thevenin voltage and resistance, the Norton current, the load current and power for your load, and the load that gets maximum power and that power.
What it asks for and what it shows
It asks for 5 values at its prompts. In the example below it shows VTH (V), RTH OHM, IN (A), IL (A), PL (W), PMAX W.
Example run
One of its oracle test cases: “divider with an output resistor”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | 12 |
| Input 2 | 1000 |
| Input 3 | 2000 |
| Input 4 | 500 |
| Input 5 | 1000 |
| The screen shows | |
VTH (V)= | 8 |
RTH OHM= | 1166.666667 |
IN (A)= | 0.006857142857 |
IL (A)= | 0.003692307692 |
PL (W)= | 0.01363313609 |
PMAX W= | 0.01371428571 |
How it's checked
4 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 27 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Thevenin equivalent and maximum power” (THEVEN).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
Related programs
- RC circuit charging transient
- Three-loop circuit (mesh currents)
- RC, RL and RLC transient response
- Series-parallel resistor network reducer
- AC circuit: series or parallel RLC phasors
All TI-84 Plus CE engineering programs · All TI-84 Plus CE programs