Scientific RPN Calculator (with ATTINY85)

[Paul Dale]

Nice device, the code looks very tight with plenty of space savers. I like \( \sqrt{x} = e^{\frac{ln (x)}{2}} \) and the common routine for both e^x and the trigonometric functions.

It also reaffirms the miracle of the HP 35 with its 7680 bits of ROM and the Sinclair Scientific with its 3520 bits of ROM.


Pauli