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From: "Steve Tyng" <STyng-at-ACPTrust.com>
Subject: RE: Joe Sommer/Anvilus [TANKS]
Date: Thu, 6 Apr 2006 16:23:32 -0400
Reply-To: tanks-at-rctankcombat.com


Since your interested in the Anvilus Mini I'm assuming you are not going
to be using proportional speed control.

If your worried if the coils from three automotive relays in parallel
will pull more than the 150ma that the Anvilus Mini driver can handle.
You can always drive an intermediate relay between the Mini and your
bank of relays.

You had a question regarding the plating on the Mini.  The only current
running through the Mini is the 5v logic current to power the onboard
electronics and the 12v current to power off-board relays.  There is no
appreciable current running through the Mini.

FYI, an SSR and what we normally refer to as an 30/40A automotive relays
are two different items.  An SSR is a Solid State Relay with no moving
parts.  The ones most often used in the hobby are the Crydom D1D40's.
SSR's can be PWM (pulse width modulated) to provide proportional speed
control.  Standard automotive relays are either on or off.

Concerning your target amperage requirements.  If your building a normal
sized model (90 to 120 pound range) I don't think you will approach
anywhere near the 120A level in normal operation.  

Steve Tyng