All posts by Lenore Edman

About Lenore Edman

Co-founder of Evil Mad Scientist Laboratories.

Inside the 741


Ken Shirriff has written an excellent exploration of the 741 op-amp, including decapping a metal can package AD741. There’s a very cool interactive viewer so that you can click on the components in the schematic or on the picture of the die to see what each one is and does.

…The 25pF capacitor in the 741 has a very small value but takes up a large fraction of the chip’s area. You can see the capacitor in the middle of the die photo; it is the largest structure on the chip. …

Our very own XL741 is referenced in the footnotes, too.

Evil Mad Scientist Open House: November 19

Evil Mad Scientist Door

You’re invited to our annual open house!

When: Thursday, November 19, 5 pm − 9 pm
Where: Evil Mad Scientist Laboratories
175 San Lazaro Ave, Suite 150
Sunnyvale, CA, 94086

You can check out our latest projects, play with the giant Digi-Comp II, meet Zener the cat, and share in food and conversation.

From the archives: Sweet or Savory Specimen Jars

thinginajar - 44

 

From the archives comes one of our favorite food projects: Halloween Cuisine: Sweet or Savory Specimen Jars.

 What good is a specimen jar if you can’t serve it at dinner? The contents of the jars should be genuinely edible, made out of real food. Plastic snakes and spiders are right out.

More Halloween edibles can be found  in the food category of our Halloween Project Archive.

Halloween Project Archives

Array of Halloween Projects

Halloween is one of our favorite holidays, and our collection of Halloween projects continues to grow. Every fall we update it to include our latest projects for the season. In the list … we’ve organized dozens of our Halloween projects into categories: costumespumpkinsdecor and food.

Head over to the Halloween Project Archives for the full list of projects.