This program is for electronic circuit designers. It calculates the value of resistors and capacitors needed to complete a timer circuit using the famous 555 integrated circuit.
Both Astable and Monostable modes are catered for. Select the mode by clicking on the appropriate radio button. Enter the required time delay (monstable) or frequency (astable) and press return. Component values are displayed using the nearest preffered value from the 12 values per decade range.
If you enter resistor and capacitor values the frequency or time period will be displayed.
By default values are in ohms, microfarads, hertz and seconds.