User:AJim

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

helpful links

notes

User:AJim/bugs - notes
User:AJim/eon - short, long-running program, with example uses
User:AJim/rbc - focus on role in CO2 transport, seems to be accepted
User:AJim/step - voltage step response
User:AJim/menuet - so much to add
User:AJim/checklist