jurasz.de

Jarek Jurasz

In electronics there is hardly anything simpler than a voltage divider circuit. Most people know that Vo = R2 / (R1 + R2) * Vi, where R2 / (R1 + R2) = f is the divider fraction. But it is not obvious how to choose the resistor values. You can start with one value, calculate the other one, get...

Continue reading...

Usłyszałem dziwny szelest w piwnicy. Patrzę... polna myszka siedzi sobie i ząbkami serek skrobie.

Nazwałem myszkę Jerry. Jak on tam wlazł? Jak by go tu złapać?

Continue reading...

My robotic lawnmower (Landroid M1000) stopped to work, complaining it is out of its work area. I knew the wire had some weak spots, but where? It is a few years old, several hundred meters long, hidden under grass... An interesting challenge.

Continue reading...

There is a cool group on Facebook called "Electronics Theory and Circuit Design". People have interesting ideas, the group has good spirit and culture.

But I had this not-so-nice discussion with a new member called Doug Hale. He proudly presented XY scope photos with a circles on a rectangular ras...

Continue reading...

For a couple weeks now I have this Hantek 2D42 handheld oscilloscope, multimeter and generator and it is time to start a review.

Continue reading...