The scooter controller prototype circuit was based on some early designs
by Joe Sommer and myself, incorporating lots of things we've learned
over the years. The circuit was battle-tested during the spring battle
in Paul's PzII and the circuit worked well. We did some additional
testing over the summer in both Paul's and John's PzIIs to make sure
they behaved properly. One prototype board was sent out to the Vegas
Alliance for some "non-expert" (that's an understatement) testing.
Finally, we were hoping for some final battle testing this weekend, but
the weather didn't cooperate.
I'm currently in the process of finalizing the design of the production
circuit. The final circuit will probably provide the following features:
- Input from two standard servo signals (C6C, Old (5V), New (3.3v))
- Output throttle signal to two scooter controllers (speed control)
- Output 12v signals to two pairs of auto relays (direction control)
- Optional tank-style mixing or independent outputs
- Upper limit settings for forward/reverse speeds
- Ramp rate setting (how fast the speed is increased/decreased)
- Delay setting (how fast relays are activated after a direction change)
The goal is to provide a 24v 500W dual-motor modular solution for
$100-$150. That's better than equivalent commercial products, with the
added benefit that all critical parts will be in sockets and can be
easily replaced if they fail. Blow out a scooter controller, it only
costs $20 to replace. Blow out a direction relay, it only costs $2 to
replace.
Frank P.
On 10/30/2011 10:53 AM, Fred Thomson wrote:
Inquiring minds want to know. (Bad pun intended). I don't think they
got much of a work-out at Gettysburg due to snow.
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