E-Code

Computation pad 5,000 sheets

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E-Code turns a homework problem into a working program for your TI-84 Plus CE, TI-84 Plus or TI-89 Titanium. It checks the program on E-Calc, a virtual copy of your calculator, before you type a single key.

We open in less than a month. Right now we're testing on real calculators.

This pad has 5,000 sheets, one for each early spot. The first 5,000 people on the list get in first.

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A ball is launched at 20 m/s at 35° above level ground. Find the time of flight, the maximum height and the range.

Asked E-Code:

"Projectile motion: given a launch speed and angle, find the time of flight, the max height and the range."

PROGRAM:PROJMOTNTI-84 Plus CE
Prompt V,A
"//PROJECTILE MOTION: V=LAUNCH SPEED M/S, A=ANGLE DEG, G=9.8 M/S²"
(A*π/180)→R
(2*V*sin(R)/9.8)→T
((V*sin(R))²/19.6)→H
(V²*sin(2*R)/9.8)→X
ClrHome
Disp "TIME (S):"
Disp T
Disp "MAX HT (M):"
Disp H
Disp "RANGE (M):"
Disp X
TI-84 Plus CE screen. TIME (S): 2.341128312. MAX HT (M): 6.71408017. RANGE (M): 38.35480085. Done.
E-Calc ran it with V = 20, A = 35

Answer: time of flight 2.34 seconds, maximum height 6.71 meters, range 38.35 meters. Checked.

PROJMOTN is in the E-Code library. Every program is checked on E-Calc before you see it, and then it goes to your calculator.

Opens in Less than a month

Now Testing on real calculators. Running E-Code's programs on a real TI-84 Plus CE, TI-84 Plus and TI-89 Titanium.

Updated

  1. E-Calc builtdone
  2. Programs checked on E-Calcdone
  3. Testing on real calculatorswe are here
  4. The waitlist gets innext
  5. Open to everyonelater

From our reels. Each is a real program in the E-Code library, and the calculator screen in each one is E-Calc running it.

  1. Fig. 1 PROJSTEP, TI-84 Plus CE. A projectile problem, every step shown.

  2. Fig. 2 WINDTUNL, TI-84 Plus CE. Airflow over a wing, 43,725 pixels solved one row at a time.

  3. Fig. 3 MARS89, TI-89 Titanium. An Earth-to-Mars launch window from 425 orbit solves.

  4. Fig. 4 HORIZON, TI-89 Titanium. 6,004 light rays traced backwards around a black hole.

  1. When does E-Code open?

    We're aiming for less than a month. Right now we're running programs on real calculators, and the status above shows where things are.

  2. What do the first 5,000 get?

    First access. We open E-Code to the first 5,000 people on the list before we open it to everyone. The count on this page is the real number of sheets left.

  3. Which calculators?

    The TI-84 Plus CE, the TI-84 Plus and the TI-89 Titanium. More calculators later.

  4. Do I have to give my phone number?

    No. Email is how we'll reach you. A number is only for one text when we open, and only if you tick the box next to it.

  5. What happens to my details?

    We use them only to tell you about E-Code opening, and we don't sell them. Email [email protected] any time to be removed. The waitlist privacy notice has the details.

  6. Who is it for?

    Students 18 and older, mostly in college engineering, physics and math. Programs E-Code writes are written by AI and checked on E-Calc before you see them.

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