555 Astable Multivibrator Calculator
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To run the program, on the home screen enter:

electron\ast555()

or select it from the catalog. The program and all subprogram live on their
own folder (electron) so they will not interfere with any of your variables in the main folder.

This short program allow you to design and analyze a 555 circuit connected
as an astable multivibrator. There are three choices on the main menu:

1. Compose 555

Enter a frequency, duty cycle and capacitor value (capacitor may be selected
from the standard E12 series or manually entered). The program will
calculate the values of R1 and R2 resistors and present a graphical
representation of the pulse output.

2. Analyze 555

Enter the values of all components (R1, R2, C) either by selecting from the
E12 series or manually. The program will calculate the frequency and duty
cycle of the resulting circuit. It will also present a graphical
representation of the pulse output

3. Exit

Exit program, restoring calculator modes and settings to the previous ones.

Should the program crash or you stop execution by pressing the On key, previous settings will not be restored. In this case, enter the following commands in
the Home screen:

setfold(electron)
RclGDB gdb1
setMode(md1)
setfold(main)

I hope you find this program useful! Please send comments to: sonicy@otenet.gr
