How do I learn RPL and solve this problem with it?

09242017, 03:18 PM
Post: #5




RE: How do I learn RPL and solve this problem with it?
Thanks all for the replies. Much appreciated.
Fundamentally the problem is, I need a 523K resistor for example as the output of a filter design program. If I enter this into my current program it will pop out: 560K  8.2M = 524.2K (0.23%) That means if I parallel 560K and 8.2M I will get 524.2k to within 0.23%. Now the resistor bank is a 1% accuracy one so that will be within the design tolerance (ignoring external factors like capacitor tolerance) I'm not sure that the current solution is actually viable on the HP 50G as the combined list is quite large. I don't have it here in front of me now as it's on my Mac and I'm on a phone but I think it was in the order of a few Mb of data. I'm aware of stack languages (about 20 years ago I actually wrote a FORTH implementation for Z80 CPUs whilst bored at university) so I'm aware of the concepts. Will have a look around at what people have suggested. Thanks again. 

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