Reading other Blogs

Welcome to my blog, now leave and go read some other blogs. I should get back into posting here more. And part of why I say that is from reading another post, on another blog.

"There’s a story about an art teacher that split their class in half. They told one half of the students that they’d be graded based on a single piece of work, and the other half that they would be graded on the quantity of work produced.

The half that was being graded on quantity ended up producing higher quality pieces.

By iterating and learning from their mistakes they actually ended up producing better work than the students that only had to produce one piece.

Quantity leads to quality." - Chris Mytton

This has me thinking now about what I am afraid to learn more about, because failure is a risk. Instead, I need to cherish the mindset that failure is necessary sometimes for success. 

Electrical Switches; BJTs, MOSFETs, and Relays

MOSFET usually come in a TO220 package.

Relays are often sold as plastic potted boxes with leads extending from one side.

BJTs often come in a TO92 package but can sometimes be packaged as TO220

On circuit breakers, light switches, and kitchen appliances, opening or closing an electrical contact is a mechanical action bringing together pieces using an applied force to bring together two conducting pieces of material. In electronics these days, opening or closing an electrical contact is often accomplished with transistors or relays. 

For transistors, the bipolar junction transistor (BJT) or metal oxide field transistor (MOSFET) are popular options. In years past, uni-junction transistors were used for switching applications but have now become less popular. Transistors pop up mostly in small electronics while relays are most often used for larger electrical loads with current draws beyond a few mA.

When designing a device that incorporates electrical switches, it is important to understand the application in order to pick the best device to engage your circuit. In the teeny tiny operations of a microchip, billions of microscopic BJT transistors are etched on a silicon wafer. Whereas, a much larger BJT (on the scale of inches across) might be used to engage the power sent to an induction cooker. Both these applications rely on the BJT concept although the BJT designed for the purpose is wildly different. Similar stories can be told for MOSFETs and relays that are sized for the application.

Jigsaws, Woodchucks, and O-rings


Although East Campus did not have a Resident Exploration (REX) week this year, I managed to find myself with some work that involves cutting wood. No roller coasters or rides of that sort. This woodwork involved some jig saw and miter saw work. I have been thinking about getting back into my own projects a bit more.



Look closely and see a lil woodchuck


Learned how to refit a o-ring on some glassware since this one wore out.

 

Reading other Blogs

Welcome to my blog, now leave and go read some other blogs. I should get back into posting here more. And part of why I say that is from rea...