There always has to be some sort of electronic interface between the R/C
Receiver and the door-lock (or e-trigger) solenoid and Mike has been
cataloging the various ways that can be done.
Option (a) below is the simplest solution, that anyone can implement
with only basic tools and wiring skills. It can also be done for less
than $5 using readily available parts from surplus catalogs. It also
doesn't require any modifications to the marker.
Options (b), (c) and (d) below don't use a "servo", they use a "servo
switch" which is "an electronic circuit that accepts a servo input
signal and then switches something". The most common servo switch
circuits use a simple micro-processor to read the servo signal and
trigger the switch. Old-timers used a 555 and an assortment of other
components to achieve the same goal but that's horse-and-buggy type stuff.
Mike listed some servo switches that are commercially available, all of
which can be used to operate a door-lock actuator or switch an e-trigger
circuit. When used with a door-lock actuator, no marker modifications
are required. When used with the e-trigger mechanical switch, you need
only solder a pair of wires between the mechanical switch and the servo
switch.
Option (d) is a prototype circuit board used in the most recent battles
that can drive the e-trigger solenoid directly from a servo signal. It
requires the most drastic changes to the marker, disconnecting the
solenoid from the e-trigger circuit and connecting it to the servo
switch board.
I guess we should also include an Option (e) which is an
"Opto-isolator-based Servo Switch". They provide isolation like a
mechanical relay without any moving parts, but they can't handle as much
current as a FET or relay. Relays, FETs and opto-isolators are the most
common approaches for switching something, with various advantages and
disadvantages that keep them all in use.
On 10/8/2014 5:17 PM, isaac goldman wrote:
Why does there have to be a servo involved? You can fire a door lock
solenoid with only electronics quite easily. Or am i misunderstanding?
Ill post a circuit later tonight.
On 2014-10-08 5:12 PM, "Frank Pittelli" <frank.pitte...@gmail.com
<mailto:frank.pitte...@gmail.com>> wrote:
a) Servo & Mechanical Switch
b) Relay-based Servo Switch
c) FET-based Servo Switch
d) Prototype CCS Servo Switch (FET-based)
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