The Calculator Minimalist Programming Club

03032019, 04:27 PM
Post: #21




RE: The Calculator Minimalist Programming Club
(03032019 11:55 AM)Csaba Tizedes Wrote: One application on my TI57 LCD  maybe it is enough for membership: For those interested here's the program for the TI57II: Code: LBL 0 23.00 00 We can solve this differential equation by separating the variables: \(\int_{p_0}^{p_b} \frac{dp}{p}=C \int_{T_0}^{T_b} \frac{dT}{T^2}\) This leads to: \(\log(p_b)  \log(p_0) = C \left (\frac{1}{T_0}  \frac{1}{T_b} \right )\) Which allows us to solve for \(T_b\): \(\begin{align*} \frac{1}{T_b} &= \frac{1}{T_0}  \frac{\log(p_b)  \log(p_0)}{C} \\ &= \frac{1}{T_0} + \frac{\log(p_0)  \log(p_b)}{C} \\ &= \frac{1}{T_0} + \frac{\log(\frac{p_0}{p_b})}{C} \\ \end{align*}\) Given the following values we can calculate the temperature \(t_b = T_b  273.15\) of the boiling point: \(\begin{matrix} T_0 =&100 + 273.15 \\ p_0 =&101325 \\ p_b =&200000\\ C =& 4889 \end{matrix}\) 100 + 273.15 = 1/x + (101325 ÷ 200000) lnx ÷ 4889 = 1/x  273.15 = 120.42637 Cheers Thomas 

03032019, 07:29 PM
Post: #22




RE: The Calculator Minimalist Programming Club
(03032019 04:27 PM)Thomas Klemm Wrote: ...here's the program...Thank you for typing! (03032019 04:27 PM)Thomas Klemm Wrote: We can solve this differential equation by separating the variables...t=120.42637Yes, and here my CASIO fx991DEX with SOLVE+integral solves the same problem: SOLVE+integral really useful in this case. Csaba 

03062019, 01:26 PM
Post: #23




RE: The Calculator Minimalist Programming Club
(01162017 04:59 PM)Eddie W. Shore Wrote: Looking at picture of Sinclair Cambridge Scientific (thanks Google), and if I extended the Minimalist club to include nonprogrammable scientific calculators, this would definitely qualify. How about the Sinclair Scientific Programmable? 

03062019, 05:50 PM
Post: #24




RE: The Calculator Minimalist Programming Club
(03062019 01:26 PM)Harald Wrote:(01162017 04:59 PM)Eddie W. Shore Wrote: Looking at picture of Sinclair Cambridge Scientific (thanks Google), and if I extended the Minimalist club to include nonprogrammable scientific calculators, this would definitely qualify. If that's anything like the Sinclair Cambridge Programmable, then it's a tremendous challenge to do anything particularly useful with its 36 steps and one storage register. 

03072019, 09:54 AM
Post: #25




RE: The Calculator Minimalist Programming Club
(03062019 05:50 PM)Dave Britten Wrote:(03062019 01:26 PM)Harald Wrote: How about the Sinclair Scientific Programmable? Yes, it even is a challange to do simple calculations. But the program library is pretty impressive. It is amazing how much they acomplished with the limited resources this calculator has. Cheers, Harald 

03082019, 08:27 AM
Post: #26




RE: The Calculator Minimalist Programming Club
There's a workalike model of Sinclair's Cambridge Programmable to run in your browser here. This machine has a conditional branch, so it really is programmable, whereas their earlier Scientific Programmable could only record keystroke sequences. I'd be very interested to see the program library for the Cambridge Programmable. (Katie's site has only the 10 page sample.)


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