Fun with the Sharp
EL-5500 III (May 2018 Edition)
The EL-5500 III is one of my favorite pocket programming
device, small, portable, and has my favorite programming language: BASIC.
Let’s get started.
Note: Substitute line
numbers with labels that you find fit.
Add defined labels to the first line if you would like. Labels can come from the bottom two rows of
the QWERTY keyboard (A row and Z row).
Comments are followed by double slashes (//), they are not typed.
Sharp EL-5500 III Program: Net Present Value
2 PAUSE “NET PRESEN VALUE”
4 CLEAR
// clears all the variables
6 INPUT “CF0:”; N, “RATE:”; I
8 J = 1
10 INPUT “FLOW:”; F,
“FREQ:”; K
12 FOR L=1 TO K: N =
N + F/(1 + I/100)^J: J = J+1
14 NEXT L
16 INPUT “MORE=1: “;
L // enter 1 to enter more cash flows, anything
else to end entry
18 PRINT USING “#############.##”;
“NPV: “; N
20 END
Example:
CF0: -7,000, Interest Rate: 8%
Flow 1: 2,000, Freq
1: 1 (enter 1 for MORE)
Flow 2: 1,500, Freq
2: 2 (enter 1 for MORE)
Flow 3: 2,500, Freq
3: 2 (we are at the end, enter anything
other than 1 at MORE)
Result:
NPV: 2443.06
Sharp EL-5500 III
Program: Synthetic Division
2 PAUSE “Synthetic
Division”: CLEAR
4 PRINT “P(X)/(X –
R)”: WAIT 59 // WAIT 59 is about 1
second
6 INPUT “DEGREE:”; N
8 DIM P(N): DIM Q(N)
10 FOR I=1 TO N
12 PRINT “COEF OF X^”;
N-I
14 INPUT P(I): Q(I)
= P(I)
16 NEXT I // there is no line 18
20 INPUT “R:”; R
22 FOR I=0 TO N-1
24 Q(I+1) = R*Q(I) +
P(I+1)
26 NEXT I
28 E = Q(N)
30 PRINT “Q(X) = “
32 FOR I=0 TO N-1
34 PRINT Q(I); “X^”;
N-I-1
36 WAIT 150 // about 2.5 seconds
38 NEXT I
40 PRINT “+”; E; “/(X-“;
R; “)”: END
Example: (x^4 – 2*x^3
+ 1) / (x – 1)
Degree: 4
Coefficients: 1, -2,
0, 0, 1
R: 1
Result: 1, -1, -1, -1, no remainder
x^3 – x^2 – x – x
Sharp EL-5500 III
Program: Vector Basics
Cross product, dot product, norm of two vectors, angle
between two vectors
2 PAUSE “Vector
Basics”
4 INPUT “X1:”; X1, “Y1:”;
Y1, “Z1:”; Z1 \\ vector 1
6 INPUT “X2:’; X2, “Y2:”;
Y2, “Z2:”, Z2 \\ vector 2
8 C1 = Y1*Z2 – Y2*Z1:
C2 = -X1*Z2 + X2*Z1: C3 = X1*Y2 – X2*Y1
// cross product
10 D = X1*X2 + Y1*Y2
+ Z1*Z2 \\ dot product
12 N1 = √(SQU X1 +
SQU Y1 + SQU Z1): N2 = √(SQU X2 + SQU Y2 + SQU Z2) // norm, SQU is the x^2 key
14 DEGREE
16 A = ACS(
D/(N1*N2)) // angle between vectors, ACS
is ACOS
18 PRINT “CROSS X: ”;
C1
20 PRINT “CROSS Y: ”;
C2
22 PRINT “CROSS Z: ”;
C3
24 PRINT “DOT: ”; D
26 PRINT “NORM V1: “;
N1
28 PRINT “NORM V2: “;
N2
30 PRINT “ANGLE: “;
A
32 END
Example: V1 = [-2, 3,
0] and V2 = [ 4, 2, -11]
Cross: [-33, -22, -16]
Dot: -2
Norm V1: 3.605551275
Norm V2: 11.87434209
Angle: 92.67749998°
Sharp EL-5500 III:
Atwood Machine
M1: mass hanging on
the left side of the machine
M2: mass hanging on
the right side of the machine
The program asks to choose a unit system. Enter 1 for US units (feet, pounds, seconds,
g = 32.174 ft/s^2), anything else for SI units (meters, kilograms, seconds, g =
9.80665 m/s^2).
2 PAUSE “Atwood
Machine”
4 INPUT “1: US,
ELSE: SI “; I
6 IF I=1 THEN LET
G=32.174
8 IF I<>1 THEN
LET G=9.80665
10 INPUT “M1: “; M1,
“M2: “; M2
12 A = (M1 – M2)*G /
(M1 + M2)
14 T = M1 * (G-A)
16 PRINT “Accel.: “;
A
18 PRINT “Tension: “:
T
20 END
Example: M1 = 11.82
kg, M2 = 9.38 kg, use SI units (enter anything other than 1 at the 1:US,
ELSE:SI prompt)
Results:
Accel.: 1.128689906 m/s^2
Tension: 102.5734883 N
Eddie
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content copyright, © 2011-2018. Edward
Shore. Unauthorized use and/or
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