Radio Shack EC-4036
Datasheet legend
Ab/c:
Fractions calculation
AC: Alternating current BaseN: Number base calculations Card: Magnetic card storage Cmem: Continuous memory Cond: Conditional execution Const: Scientific constants Cplx: Complex number arithmetic DC: Direct current Eqlib: Equation library Exp: Exponential/logarithmic functions Fin: Financial functions Grph: Graphing capability Hyp: Hyperbolic functions Ind: Indirect addressing Intg: Numerical integration Jump: Unconditional jump (GOTO) Lbl: Program labels LCD: Liquid Crystal Display LED: Light-Emitting Diode Li-ion: Lithium-ion rechargeable battery Lreg: Linear regression (2-variable statistics) mA: Milliamperes of current Mtrx: Matrix support NiCd: Nickel-Cadmium rechargeable battery NiMH: Nickel-metal-hydrite rechargeable battery Prnt: Printer RTC: Real-time clock Sdev: Standard deviation (1-variable statistics) Solv: Equation solver Subr: Subroutine call capability Symb: Symbolic computing Tape: Magnetic tape storage Trig: Trigonometric functions Units: Unit conversions VAC: Volts AC VDC: Volts DC |
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Radio Shack EC-4036
Yet another Radio Shack calculator using the Sharp LI3301A calculator integrated circuit. This amazingly popular chip was used in at least thirteen different models that I know about, two of them from Radio Shack.
The calculator's primitive programming model does not allow branching or conditionals, and its memory capacity is limited. Nevertheless, Stirling's formula fits easily into the calculator's memory:
+ 1 = yx MS ÷ MR ex × ( 2 × π × MR ) √ × ( 1 2 1/x ÷ MR + 1 ) ÷ MR =