[Mraedis]

The real start is on the next pages which goes into _real_ deep intro for Diodes and transistors. I think it was just a matter of giving an intro but overseeing that people don't know what these symbols mean.

For me, an electronics engineer by degree (not by trade), it was so basic I could see the author forgetting this.

[dnlbele]

Thx 4 the ‘overseeing’ comment, it is important never to loose that aspect when addressing the reader!