I am looking for PC software calculator (free or pay) that would allow me enter simple equations with few variables and save them for specific use.
For example to find out what resistors are needed to obtain a given voltage output for a precision voltage regulator using a TL431 or equivalent:
Vo=(1+ R1/R2)*Vref
Say I want 3.3V for Vo, R1=10k, Vref=2.50. I enter these variables and click solve and the answer comes out: R2=31250. I then can choose the nearest standard value (33K) and solve again for Vo.
I want to save this equation as "TL431 regulator".
The same would apply to V/I calculations for resistor networks, simple RC circuits, etc
I don't want to have to enter the equation every single time, I just want load it by the text name.
Any suggestions?
For example to find out what resistors are needed to obtain a given voltage output for a precision voltage regulator using a TL431 or equivalent:
Vo=(1+ R1/R2)*Vref
Say I want 3.3V for Vo, R1=10k, Vref=2.50. I enter these variables and click solve and the answer comes out: R2=31250. I then can choose the nearest standard value (33K) and solve again for Vo.
I want to save this equation as "TL431 regulator".
The same would apply to V/I calculations for resistor networks, simple RC circuits, etc
I don't want to have to enter the equation every single time, I just want load it by the text name.
Any suggestions?