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555calc is a four function calculator with nine memories and instant square root and cube root.

You can enter values for R1, R2, C1 and instantly display the oscillator frequency or the on time and off time. Enter frequency or times and resistor value(s) and get the capacitance.

555calc also has instant resistor colour code display. You can enter the resistor value and display the nearest colours for each band or enter the colours and display the resistor value. The program even has reprogrammed solutions to the 555 timer.

This latest version includes larger display numerals.

This download is the free trial version of 555calc. The full version can be purchased directly from the author. See program documentation for details.