Some example programs.

• Loan (Financial)

• Savings (Financial)

• A lowpass filter (Electronics)

• Gain and logarithm (Electronics)

If you have a program for CplxCal you would like to share with other people please do not hesitate to email it to us.

• Loan (Financial)

Type the following in a user program:

This should look like this: Now press [ok] and you should see the screen below, lines 3 and 4 are empty. Five user keys are now assigned with formulas.
Pressing [pmt] will show you your monthy payment for a 30 year loan of $100000 with an interest rate of 7% and 12 payments per year. [tp] total amount paid after 30 years. [tf] total amount amount paid - loan amount [cp] cumulative principal after pn payments [ci] cumulative interest after pn payments

• Savings   (financial)

You can use PMT to determine payments to annuities. For example, if you want to save $60,000 in 20 years by saving a constant amount each month, you can use PMT to determine how much you must save. If you assume you'll be able to earn 5.5 percent interest on your savings, you can use PMT to determine how much to save each month.

Type the following in line 1,2 and line 3:

Now press [exe] and your monthly payment is shown on line four.

If you pay $137.73 into a 5.5 percent savings account every month for 20 years, you will have $60,000.

Notice the ;p12 at the end of line 3. The last expression or variable will be shown on line 4.

Now lets see how much you would need to pay each month when you pay 13 times a year instead of 12.

Change line 1,2 and 3 as shown:

Now press [exe] and your monthly payment is shown on line four.

Now put your stylus on the equal sign in line 3 and highlight the rest of line 3. Select [menu][edit][cut] which will only leave t13 on line 3 and press [exe].

The total amount paid is now shown on line 4.

Change t13 into t12 and press [exe]. This is the total amount paid when you would pay 12 times a year instead of 13 times, every month instead of every four weeks.

Now you can type t12-t13 at line 3 and press [exe].

Of course if this is something you would need on a regular basis you can copy it to one of the eight users program. I normally need to delete a user program first before I can add an other one. Don't forget to copy and paste to memopad before deleting a program.

• A lowpass filter (Electronics)

Type the following in a user program:

Press [ok] and line 1 and 2 should appear.

Note: Version 3.1 is needed for the suffixes K and n in line one.

After pressing the user defined key [an] the lines 3 and 4 should appear.

Line 4 shows the angle for this lowpass filter at 1 khz.

Now press Fc to calculate the cutoff. 3386.28 will be shown at line four.

Change the 1K at line one to 3386.28 and press [an]. It will show an angle of -45 degrees at the cutoff frequency.

Pressing pd will show:

Feel free to try this on any other calculator for the palm pilot :-)

• Gain and logarithm (Electronics)