[sdiy] Revisit - Minimum parts count switch de-bouncer.

[Tim Daugard]

I'm between trips, so I have a few minutes.

On the cap switch discussion.

SWITCH

Per my HVAC engineer father "Switch contacts are destroyed by the arcing
when the contacts disengage. The intial engagment causes no problems. It is
the continuation of the currents as you try to pull the contacts a part . .
." that burn the contacts / remove material.

AS we are using the switch to charge or (in my case) discharge a capacitor,
the current should drop significantly as time goes on, so the switch used
should be okay.

CAPACITOR

Capacitors are exposed to currents a 120 times / second in a power supply.
A capacitor goes through more cycles in 20 minutes than we may use in the
life of the module.

HOWEVER

1) The manufacture says don't do it.

2) Current depends on ESR.

SO

I will still try to measure ESR and discharge current soon (may have to
wait till after the next trip) and maybe put a resistor inline with the
switch. (agreeing with Na, Na-Na, Na, Ha Ha, Harry, Goodbye)

Tim Daugard
AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
http://home.sprintmail.com/~daugard/synth.htm

And why do y'all post less than 50 messages a day when I'm here and over a
100 a day when I'm gone?