Re: AW: [DML] Re: Problem with Lockzilla

[Martin Gutkowski <webmaster@xxxx>]

Elvis Nocita wrote:

> what kind of protection diodes are you talking about ? to cut the spikes of
> the selenoides in the door or for the normaly used diodes parallel to the
> relay ?

Please see the article at:

http://www.dmcnews.com/Techsection/doorlocks.htm

Specifically the update from 10/1/01

> By the way, this fan fail module - can you tell me what is the problem with
> that one ? Why would it fail ? Winter is near and may be I'll find some time
> to replace this thing, too.

Consider the current the fans draw. Now consider passing this current through a PCB track
a couple of millimetres wide. Now connect the brass (!) module "legs" to these tracks by
soldering a tip barely a millimetre across. Imagine what happenns when you unplug and
replace the module a couple of times. Dry joints anyone?!

I've replaced both the fan relay and the fan fail module with a pair of relays with
integrated 15A fuses, mounted in trailing sockets with the wires crimped so each fan is
powered from one relay.

Martin
#1458 & #4426 - picking her up this weekend!