The purpose of that circuit is to turn on the master solenoid. That is
that way so that there is only one wire needed to control the master
solenoid. Otherwise, you'd need an always hot wire going to the panel
throught the master switch and then back to the solenoid (which needs two
wires). It also has an advantage of restricting battery voltage to the
battery box area when the master is in the off position so that there is
less chance of an electrical short that can't be isolated by turning off
the master.



Jay Honeck wrote:

ASCII schematic:

(+ Battery)---(solenoid)-----(master switch)-----(- battery)

Thanks, Aaron.

For us electrical dimwits, can you explain the purpose of this circuit?

Also, why is there a 7-second delay after turning the master switch on?

Here's how it works:

1. The clock is connected to the "hot" side of the master.
2. It works fine with master "off"
3. Turn Master Switch "on" -- works fine for seven seconds.
4. At seven seconds, the clock goes out.
5. Turn Master Switch "off" and the clock comes back on.

What's going on? Why is this circuit set up to do this?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

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