@labria Interesting. I am preparing an order at Digikey to replenish my parts stock and had a look on my 555. Only two left and I can't remember when I bought it. Could be 20 years ago, maybe longer. I can't remember when I used one last time in a project...It's somehow sad because it is such a monument of IC history and it's great to hear it's not obsolete.People, use more 555!#electronics #555timer #555