mwilson's blog
Servos for Radio-Controlled Models?
Submitted by mwilson on 2004, May 5 - 15:54. Modes of UseWhen I saw the buzzword PWM in the AID description, I thought about the servos that R/C hobbyists use for controls. I've been through a few web sites to learn about them.
They're buzzword-compatible, but it seems that they're used with about 20 milliseconds between updates.. each update is a pulse between 1 msec and 2 msec wide. It doesn't look like the on-chip PWM will go that slowly. Using them will be more like one of the worked solutions.
Adventures in board building
Submitted by mwilson on 2004, May 5 - 15:32. Do It Yourself My part of yesterdays meeting was to stuff one of the new
printed-circuit AID controller boards, and, with about two
exceptions, it went pretty well.
Holes in the board were undersized for the 2x5 pins that
select Rx source, and for the 7805. Drilling them one size
bigger with the Dremel fixed that.
I drilled the two holes that stake down the DB-9 socket
to 1/8". This worked, but slightly smaller holes might work
better.
My innovation was to drill 1/16" holes next to the pads
for the 9v battery connector, being careful not to break
copper traces. This let me snake the connector wires up
