Hi,

Sorry if this is off topic.

I'm looking for for a way/formula like this page:

http://www.electronicdesignworks.com/utilities/555_component_finder/555_component_finder.htm

Can someone please explain to me how this works. I find the page very useful, and I would like to put the formula in an open office spreadsheet/Excel, save it on my laptop, and work on it off line. (Meaning when I'm in my sailboat. Looking forward to lazy days in the summertime. I have aprx 150cm snow in my garden.)

 

This tutorial should have what you’re looking for www.sentex.net/~mec1995/gadgets/555/555.htm or take a look 555 timer lite www.downloadthat.com/windows/search/555_timer_lite it’s not a bad little program.

 

There is my cookbook entry...

http://forum.allaboutcircuits.com/blog.php?b=381

Look up the entry for basic multivibrator.

My LED article also has the data...

LEDs, 555s, Flashers, and Light Chasers

And then my projects describe how they work...

The 555 Projects

CMOS 555 Long Duration Minimum Parts LED Flasher


I suspect there is something in there you can use.

 

That reminds me, I also made this for that kind of application a while back...

It is missing some nifty circuits I've put in my cookbook, but it covers the basics.

 

Thank You for your replies. I've read your articles mr. Marsden, and they are leading me in the right direction.

Thanks again.

 

Hi,

Sorry if this is off topic.

I'm looking for for a way/formula like this page:

http://www.electronicdesignworks.com/utilities/555_component_finder/555_component_finder.htm

Can someone please explain to me how this works. I find the page very useful, and I would like to put the formula in an open office spreadsheet/Excel, save it on my laptop, and work on it off line. (Meaning when I'm in my sailboat. Looking forward to lazy days in the summertime. I have aprx 150cm snow in my garden.)

Hei Jens
I think they have made the program using the formula in the 555 data sheet. And a database with standard resistor and capacitor values. I tested the site and some of the values suggested are only theoretical values at the best

 

Yes. That was my conclusion too. I always pick the nearest component.

 

By the way. Have you looked at micro controller units(MCU) technology Jens. You can get MCUs in a 8 pin dip. You can do a lot cool stuff with those chips. And I know you like programming.

 

Programming is great fun!

I tried to build a few 16F84A programmers, but I didn't get it to work properly. At least that is what I think...

I will get back to programming chips.

 

I think you will find this programmer/kit reasonable priced. https://www1.elfa.se/elfa~no_no/b2b/catalogstart.do?tab=catalog
Do not waste your time those crappy DIY programmers

 

The link is dead due to timeout, you must be logged in to access it.

 

Sorry the link was for my eyes only. Go to www.elfa.se then click on the picture with the brain. Select the PICKIT 2 Starter Kit link. The link is to a Scandinavian equivalent of the Digi-key store

 

Don't you need a company account to buy from that site?

 

Don't you need a company account to buy from that site?

No not at all. And they have a shop in Oslo. Just PM me if you need help. I am from Norway

 

Thank you. I might just do that.