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555 Timer Tool

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555 Timer Tool


This is a tool to help electronics hobbyists easily select component values for the ubiquitous 555 Timer chip.

You simply enter the frequency (or alternatively the delay period) that you want your 555 timer chip to run at - and an initial timing capacitor value - then the 555 Timer Tool calculates a list of the best combinations of other components that meet your requirements.

As a convenience, you can also use touch gestures to snap component values up or down to the next preferred value. To do that just stroke the values displayed on the circuit diagram. Stroke upward to adjust upwards, or stroke down to adjust downwards.

The preferred value range that values are snapped to is selected by choosing "Preferences" from the options menu.

For example, suppose you wanted a 555 timer to oscillate at 440 Hz (the A above middle C on the piano keyboard) then just:

- click the f (frequency) button on the circuit diagram, enter 440 then press the OK button

- click the C1 button on the circuit diagram, enter 47, then press the nF button, then press the OK button.

The 555 Timer Tool calculates combinations close to 440 Hz and updates the values on the circuit diagram with the closest combination.

How do you know to key in 47 nF as the initial value for C1? ...well, you don't - but you have to start somewhere and 47 nF is middle of the road!

Recent changes:
- Fixed the duty cycle calculation
- Enabled move to external storage
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Free
82
4.1
User ratings
329
Installs
50,000+
Concerns
0
File size
194 kb
Screenshots
Screenshot of 555 Timer Tool Screenshot of 555 Timer Tool

About 555 Timer Tool
This is a tool to help electronics hobbyists easily select component values for the ubiquitous 555 Timer chip.

You simply enter the frequency (or alternatively the delay period) that you want your 555 timer chip to run at - and an initial timing capacitor value - then the 555 Timer Tool calculates a list of the best combinations of other components that meet your requirements.

As a convenience, you can also use touch gestures to snap component values up or down to the next preferred value. To do that just stroke the values displayed on the circuit diagram. Stroke upward to adjust upwards, or stroke down to adjust downwards.

The preferred value range that values are snapped to is selected by choosing "Preferences" from the options menu.

For example, suppose you wanted a 555 timer to oscillate at 440 Hz (the A above middle C on the piano keyboard) then just:

- click the f (frequency) button on the circuit diagram, enter 440 then press the OK button

- click the C1 button on the circuit diagram, enter 47, then press the nF button, then press the OK button.

The 555 Timer Tool calculates combinations close to 440 Hz and updates the values on the circuit diagram with the closest combination.

How do you know to key in 47 nF as the initial value for C1? ...well, you don't - but you have to start somewhere and 47 nF is middle of the road!

Recent changes:
- Fixed the duty cycle calculation
- Enabled move to external storage
User reviews of 555 Timer Tool
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Android Market Comments
A Google User
Sep 3, 2014
Did not do anything
A Google User
Aug 28, 2014
Wave good
A Google User
Aug 17, 2014
Great for a hobbyist to plan a timer 555 chips are cheap and reliable and this will help to plan a project
A Google User
Mar 17, 2014
MTEK Excellent
A Google User
Feb 5, 2014
excellect application This is great training tool for electronics.