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...hope this helps.
I'm going to try to be a little more help than my outer space friend, it sounds like what you need is a serious duty cycle motification. You can check the data sheet for help, but what I would recomend is a simple astable oscillator, but you can calculate the resistor values using the equations given.
The charge time (output high) is given by: t1 = 0.693 (R1 + R2) C
and the discharge time (output low) is given by t2 = 0.693 (R2) C
Some simple algebra should allow you to work the equation backwards, hope this helps.
Vince
I'm going to try to be a little more help than my outer space friend, it sounds like what you need is a serious duty cycle motification. You can check the data sheet for help, but what I would recomend is a simple astable oscillator, but you can calculate the resistor values using the equations given.
The charge time (output high) is given by: t1 = 0.693 (R1 + R2) C
and the discharge time (output low) is given by t2 = 0.693 (R2) C
Some simple algebra should allow you to work the equation backwards, hope this helps.
Vince
Haha, well met indeed my friend! I haven't heard from you in a while, so it's good to see you on again.
For that extreme difference in On and Off times you might want to use two 555s or a 556. A 20 sec astable triggering a 1mS monostable.
Ken
Why use an 8-pin and a 16-pin chip (only 1/2 used) instead of two 8-pin chips, or one 14-pin chip? Or maybe one 8-pin PIC?
Ken
Well, I meant to write, but I was really caught up in a new computer game I got, the site to which can be found here: HiTech Creations - Aces High It's a lot of fun even though I keep getting killed
If Tiger wants someone to do the work for him, then he might want to try using the 555 calculator on the ETO website under tools (Hint-Hint). If he plays around with that a little bit then he may come out with the values that he wants. I also think that kMoffet may be right, a set of 2 timers would work best.
Well, I meant to write, but I was really caught up in a new computer game I got, the site to which can be found here: **broken link removed** It's a lot of fun even though I keep getting killed
If Tiger wants someone to do the work for him, then he might want to try using the 555 calculator on the ETO website under tools (Hint-Hint). If he plays around with that a little bit then he may come out with the values that he wants. I also think that kMoffet may be right, a set of 2 timers would work best.
Here is my suggestion:
LTSpice. Free download at Linear.com
LTSpice. Free download at Linear.com