I discovered Wikipedia in February 2004, and was delighted with what I found. I am learning how to use these excellent tools and, in the process, trying to make useful contributions to topics where I have some expertise.
I am greatly impressed with the power and potential of a collaborative encyclopedia project. I am proud to be able to make a contribution.
some things to do:
- relay history - the contributions of Henry and Morse as a coherent development path
- relay surge - tungsten loads are the worst case, not inductive, fix that application section
despite all that there is in here, there are some important design insights still missing
- schmitt trigger - for connecting fast logic to slowly changing signals
- related discussion of how slow signals might burn up cmos
- related discussion of logic level definitions and "undefined zone"
- inverter transfer functions, it is strange these are missing
- show black-box y=x connection
- use of some types of logic as hf amplifiers
- show derivation of bistable solution
- link to ring oscillator
in the transformer article there could usefully be a section on unintended or accidental transformers
- cross coupling, of course, and why twisted pairs and transpositions are used
- slipped pairs - when twisted pairs are misused
- why power wires must not be split in conduits - with NEC reference etc.
- induction inside airplane struck by lightning from the huge skin dI/dT, why all metal parts, such as seats, must be bonded to prevent shock
in the foldback current limit article
- a more general treatment of the generally useful foldback strategy for dealing with overload or saturation
- and the stragegy of forcing a limit-cycle oscillation for automatic recovery