Now to connect 555timer with arduino in astable mode and interpret its values?

Projects General Guidance
1

Hi everyone this is my first post on the forum!
I was wondering if anyone could point me to the right direction. I wanted to interface with a 555timer in astable mode and get its digital values so they could be compared programmatically with other parameters.

Thanks everyone!

2

millis()

Description

Returns the number of milliseconds since the Arduino board began running the current program. This number will overflow (go back to zero), after approximately 50 days.

digitalRead([pin#]); gives you digital status info.
milliscount=millis(); gives a time reference.
delay([ms]); gives a delay.
START
milliscount (start the count)
digitalRead (read the 555)
delay (delay known time in ms)
milliscount (read the count)
digitalRead (read the 555)

By alternating these three statements in a loop you develop data that would essentially plot the HIGH/LOW status with
respect to time.

3

Hi, Welcome to the forum.

Page 10.
I would suggest using the pulseIn() function.
Call it once to measure the width of the high pulses, then again to measeure the width of the low pulses.
Do whatever math needed to report period, % of time high or low, whatever.
See the Reference page for pulseIn.

Do not exceed 5V for the 555 signal you are measuring. Use a 2-resistor voltage divider if needed to bring output down to a 5V level.

4

Do we need any specific libraries for the same? As I understand these functions may not be included in the standard set.

5

pulseIn is part of the standard install.

6

Do not exceed 5V for the 555 signal you are measuring. Use a 2-resistor voltage divider if needed to bring output down to a 5V level.

Good point. He could be running the 555 off of 12V.