Monostable relay with 555

A practical application for monostable relay is temporary stair lights. After you short push on a button, light is on for few seconds (or minutes), after that lights is off.

In roumanian old magazine TEHNIUM INTERNATIONAL from march 1999 is article named “Automat de scara” writted by mr. Alexandru Marculescu:

Connexion schematic to lights is

Schematic is based on old chip 555 put in momostable schematic, like in 555 tutorial

With value from schematic minumum and maximum time are:

Using Autodesk Eagle PCB software, I redesign the schematic:

Using Livewire software, I add power supply with transformer and diodes:

For this schematic, using PCB Wisard I designed a version for this relay (download HERE as pdf file):

Another version without transformer is from article named Temporizator luces escalera:

I made a small movie with simulation, named Automat de scara:



You may also like...

30 Responses

  1. What a material of un-ambiguity and preserveness of precious knowledge regarding unexpected emotions.

  2. phone cases says:

    It is in reality a great and helpful piece of information. I am glad that you shared this helpful info with us. Please keep us informed like this. Thank you for sharing.

  3. I really like your blog.. very nice colors & theme. Did you create this website yourself or did you hire someone to do it for you? Plz reply as I’m looking to design my own blog and would like to find out where u got this from. cheers

  4. Amazing! Its really awesome piece of writing, I have got much clear idea concerning from this post.

  5. What’s Taking place i’m new to this, I stumbled upon this I have discovered It absolutely useful and it has helped me out loads. I am hoping to contribute & assist other users like its helped me. Great job.

  6. It’s fantastic that you are getting thoughts from this article as well as from our dialogue made at this time.

  7. This piece of writing is actually a nice one it helps new the web people, who are wishing in favor of blogging.

  8. bookmarked!!, I really like your blog!

  9. camera says:

    My programmer is trying to convince me to move to .net from PHP. I have always disliked the idea because of the expenses. But he’s tryiong none the less. I’ve been using Movable-type on several websites for about a year and am concerned about switching to another platform. I have heard great things about Is there a way I can import all my wordpress posts into it? Any help would be greatly appreciated!

  10. This page really has all of the information and facts I needed about this subject and didn’t know who to ask.

  11. This is my first time pay a quick visit at here and i am really happy to read all at single place.

  12. Superb, what a webpage it is! This webpage gives useful information to us, keep it up.

  13. When I originally commented I clicked the “Notify me when new comments are added” checkbox and now each time a comment is added I get several e-mails with the same comment. Is there any way you can remove people from that service? Bless you!

  14. Excellent article. I certainly appreciate this website. Keep it up!

  15. I’d like to thank you for the efforts you have put in penning this site. I am hoping to see the same high-grade blog posts by you later on as well. In truth, your creative writing abilities has motivated me to get my own, personal site now 😉

  16. Excellent blog! Do you have any helpful hints for aspiring writers? I’m hoping to start my own blog soon but I’m a little lost on everything. Would you recommend starting with a free platform like WordPress or go for a paid option? There are so many choices out there that I’m totally overwhelmed .. Any ideas? Thanks!

  17. Definitely believe that which you said. Your favorite reason seemed to be on the internet the easiest thing to be aware of. I say to you, I certainly get annoyed while people consider worries that they plainly do not know about. You managed to hit the nail upon the top and also defined out the whole thing without having side effect , people can take a signal. Will probably be back to get more. Thanks

  18. You’re so interesting! I don’t suppose I’ve read through a single thing like this before. So great to find somebody with some original thoughts on this subject. Seriously.. many thanks for starting this up. This site is one thing that’s needed on the web, someone with a bit of originality!

  19. Incredible points. Sound arguments. Keep up the great spirit.

  20. I read this paragraph completely concerning the comparison of most up-to-date and preceding technologies, it’s amazing article.

  21. Hey there! Do you know if they make any plugins to protect against hackers? I’m kinda paranoid about losing everything I’ve worked hard on. Any recommendations?

  22. Howdy would you mind stating which blog platform you’re working with? I’m looking to start my own blog in the near future but I’m having a hard time selecting between BlogEngine/Wordpress/B2evolution and Drupal. The reason I ask is because your design seems different then most blogs and I’m looking for something unique. P.S Sorry for getting off-topic but I had to ask!

  23. Hello! Would you mind if I share your blog with my myspace group? There’s a lot of people that I think would really enjoy your content. Please let me know. Thanks

  24. Luis says:

    Hello, its good paragraph concerning media print, we all be
    aware of media is a enormous source of facts.

  25. Tresa says:

    Do you mind if I quote a couple of your articles as long as I
    provide credit and sources back to your weblog?
    My blog site is in the exact same area of interest as yours and my users would certainly benefit from some of the information you
    present here. Please let me know if this ok with you.
    Thanks a lot!

  26. Randolph says:

    Thanks for finally talking about >Monostable
    relay with 555 – Arduino tehNiq <Liked it!

  27. Madelaine says:

    Everything is very opn with a very cleawr description of the challenges.

    It waas truly informative. Your website is extremely helpful.
    Thanks for sharing!

  28. More hints says:

    I simply want to tell you that I am just all new to blogs and actually enjoyed this website. Very likely I’m going to bookmark your blog post . You surely come with exceptional articles. Regards for sharing with us your website.

  29. Samira says:

    Thanks in support of sharing such a fastidious thought, post is nice, thats why i have read it completely

  30. Roland says:

    Woah! I’m really digging the template/theme of this website.
    It’s simple, yet effective. A lot of times it’s very hard to
    get that “perfect balance” between superb usability and appearance.
    I must say you have done a great job with this. Also,
    the blog loads very quick for me on Safari. Superb Blog!

Leave a Reply

Your email address will not be published. Required fields are marked *