The C12C is not currently being sold because of stocking issues (too
many projects, too little time). But, it is only one part of the
control system needed for a tank. Here's a basic guideline for the
necessary systems and what can be used to implement them. You can make
it cheaper or more expensive and you can make it simpler or more
complex, but this is a good place to start.
1) A stock 5 or 6 channel RC transmitter/receiver. The C12C is just one
such system. Numerous 2.4Ghz RC packages are now available for less
money (less than $50 from China and around $100 in the US). Some have
more features than others, but tanks generally don't need all the fancy
features. Servo-reverse is basically the only required feature.
2) You'll need either a dual motor controller or two separate motor
controllers plus a mixing circuit. Affordable options include the
Sabretooth 2x25 ($125) and Sabretooth 2x60 ($190), depending on the size
of your motors and their current draw. We've also recently started
experimenting with the Talon SR Speed Controller ($60). That's a single
motor controller, so you'll need two of them and a mixing circuit ($40),
which puts the total price in the same ballpark as a dual motor
controller. If your radio system already has tank-style channel mixing,
then you won't need the additional mixing circuit. Even when scratch
built with custom parts, getting the price below $100 is nearly
impossible for a repeatable, reliable and easily wired solution.
3) A rotate system is nothing more than a motor ($10), a drive mechanism
(gear, pulley, chain, or friction wheel) and either a servo ($10) and a
simple pair of switches ($2) to provide on-off control or an inexpensive
12V speed control ($25-40). Rotate motors don't require a lot of
current, usually less than 5A in normal usage.
4) An elevate system can be implemented using either a stock servo or a
simple motor with on-off controls. If the gun assembly is properly
balanced (add small weights until perfection is achieved), then 1/4
scale servos ($30) should handle the job. There are also new, high-tech
servo gear-head products that provide more torque/precision ($100). A
low RPM motor ($10-15) can also provide the same capabilities, while
being cheaper and more powerful.
5) Fire control is the simplest of all systems. If your marker has an
electronic trigger, you only need a stock servo ($10) and a micro-switch
($1). If your marker has a manual trigger, a stock servo ($10) can be
used to pull the trigger directly or a door-lock actuator ($6) and a
servo/switch ($11) can pull the trigger. Despite the slight extra cost
and components, the door-lock actuator is the best solution because it
can pull the trigger faster than a servo and is easier to mount to the gun.
Here are just some of the many web sites that supply the various parts
described above:
http://www.hobby-lobby.com - Spectrum 2.4Ghz radios
http://www.hobbyking.com - Turnigy 2.4Ghz radios (US warehouse)
http://www.dimensionengineering.com - Sabertooth dual motor controllers
http://www.andymark.com - Talon SR motor controller
http://www.servocity.com - servos, gear heads, mounts, RC switch
http://www.allelectronics.com - door lock actuator, switches, motors
http://www.mpja.com - switches, motors
On 5/22/2013 8:26 AM, S.Schramm wrote:
Regarding the control system for my M4 Sherman. I've been looking all
over RCTC, in the tank descriptions and in the different treads, trying
to figure out the best solution. Would love to have proportional
steering. What are you guys installing in your tanks as of 2013? I found
that the C12C Control System looks very promissing. So on to the next
step, how do i aquire / buy a complete C12C setup with some instructions
regarding wireing and component layout. Im not the big electrician, but
i can read schematics and have basic knowledge of AC DC components.
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