Cattle and Mountains

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Winter made its heavy entry in Switzerland last night, covering my home with 5 centimeter of wet and heavy snow. High areas received up to 1 meter which caused a lot of problems. Instead of sharing that rather unpleasant snow (I am more of the glaring white powderish snow person), I can share how things looked before: Colorful trees with snow-covered mountains in the back, cattle still can have a mouth of green grass. I already guessed on Sunday that this will not last for long…

Cattle and Mountains

Cattle and Mountains

How NOT to Solder Headers on a Board

There are two basic strategies in teaching:

  1. Teach and show how things should be done.
  2. Teach and show how things should NOT be done.

I usually do the first method. But there is a lot of value in the second method too!

When I asked all student groups to solder the headers on the Freescale FRDM-KL25Z board, I received one report that the board does not work any more. A quick inspection of the board showed this:

Soldering the FRDM Board Headers

How NOT to Solder the FRDM Board Headers

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