I have one with the original cover and manual bought at an auction. These are hard to find these days.
I like it. It's not too difficult to program in AES-II, which is OK on this model like the EL-5200 (EL-9000). AES has some limitations compared to BASIC or Casio's fx calculator "BASIC" dialects. But overall, this version of AES-II is quote powerful with conditionals, loops and subroutines.
Some AER EL-5150/EL-5200 programs I wrote to try out these machines:
Code:
Solve f(x)=0 for x with the bisection method
AER-II for SHARP EL-5200/EL-9000/EL-5150
Specify the function in subroutine ➊
Specify search brackets [A,B] to obtain A<=X<=B such that f(X)=0
If the final X=A or X=B then the root may not be within [A,B]
LAW OF COSINES a = √(b²+c²-2bcCOS A)
AER-II for SHARP EL-5200/EL-9000/EL-5150
EL-5150 applications page 5 (improved version)
Specify a=0 and b,c,α (angle A) to obtain side a and angles β,θ (B,C)
Specify a,b,c to obtain angles α,β,θ (A,B,C)
Log-Gamma function with 10 digits precision, requires RAD mode
Admits negative X (non-integer)
Stirling's expansion method http://rskey.org/el5150
AER-II for SHARP EL-5200/EL-9000/EL-5150
Simpson quadrature + high accuracy Simpson up to eps precision
AER-II for SHARP EL-5200/EL-9000/EL-5150
1. the first AER program takes n to integrate the function defined as
subroutine ➊ at 2n+1 points
2. the second AER program takes eps (e) max relative error for result to refine
n up to 256 for 513 points to integrate the function defined as subroutine
➊. Displays i=<integral> when the relative error is below eps, otherwise
displays ANS 1: <integral> and ANS 2: <rel.err>
LAW OF SINES a/SIN A = b/SIN B = c/SIN C
AER-II for SHARP EL-5200/EL-9000/EL-5150
EL-5150 applications page 6 (improved version for any angle mode)
Specify a,b=0 and β,θ (angles B,C) to obtain side b, angle α (A) and side c
Specify a,b,θ to obtain angles α,β (A,B) and side c