HP Forums

As a confirmed calcaholic, I've been trying to limit myself to just these, in this order:

1. HP LED - any, all, multiples (successful!)
2. HP LCD - the "more interesting ones" (RPN, RPL - partially successful!)
3. Other LED programmables - but not TI (see below)
4. Other LED scientifics - particularly, but not exclusively, RPN
5. Other interesting LEDs (like Heath 1401 - 3x of those!)
6. TI programmables (58, 59...)

Had to share my latest find - in category 3 - a PERFECT, AS NEW Litronix 2290 LED Programmable! This beauty has a large LED display, with "digit for DP" like the HP Classics, square root (divide/+ !!), one memory - and - 10 KEYSTROKE PROGRAMMABILITY!! Almost useless! But SO beautiful!!!

(08-09-2018 11:58 PM)markhen Wrote: [ -> ](…) square root (divide/+ !!), one memory - and - 10 KEYSTROKE PROGRAMMABILITY!!

I wondered how Victor T. Toth implemented the Gamma function with this.

Quote:Almost useless!

At least you can calculate the amount of time it takes for an object to fall from a given height:

Quote:But SO beautiful!!!

Nice find. Congratulations!

I read Victor's page and that is what caused me to have an auction site search active!

Victor's program makes use of that "hidden" square root feature (divide followed by +=), nice.

Strangely Victor's text answer of 4.67 seconds does not agree with the program or the equation - which yield 4.52 seconds ;-)

(08-10-2018 04:46 PM)markhen Wrote: [ -> ]Strangely Victor's text answer of 4.67 seconds does not agree with the program or the equation - which yield 4.52 seconds ;-)

I assume he made a typo and used \(9.18\frac{m}{s^2}\) instead of \(9.81\frac{m}{s^2}\) for the gravitational acceleration g.

Cheers
Thomas

10 steps? Wow! The calculator sure does look nice.

(08-10-2018 04:46 PM)markhen Wrote: [ -> ]Strangely Victor's text answer of 4.67 seconds does not agree with the program or the equation - which yield 4.52 seconds ;-)

Meanwhile he fixed it.