DirtyLude
Well-Known Member
After my first attempt at making a robot drivetrain with 6v non-gear motors failed (it hardly had enough torque to move at all), rather than buying gear motors which are exceedingly expensive, I just went out and bought an RC car from Radio Shack for $30.00 CDN, about $20.00 USD. The Turbo Clamper (same as the Silverlit turbo gripper). It has two drive motors that it uses the change direction, like a tracked car.
I took the thing apart, but had to put it back together again; my son decided it was now his most favorite toy.
I'm going to toss the circuit board, but I had some questions about the design.
**broken link removed**
The power transistors on the right, all run the motors. Whats the purpose of running so many smaller transistors rather than one larger one for each motor. Cost? Or is there a benefit to this?
The front headlights actually use generated current from the motor. I'm assuming they run on battery power when the car is on, and the motors generate electricity for them when turned and the power is off?
I first tried driving my 6v motors with a TC4424 chip, but they heated up way too much with just 3 seconds of running. I switched to just using simple TIP120's to run it, and these seemed to work, but I only get forward direction. I didn't think about this much, yet, but is there a way to use the TC4424 with the TIP120 to run bigger motors, or should I just go for a more capable h-bridge controller?
I took the thing apart, but had to put it back together again; my son decided it was now his most favorite toy.
I'm going to toss the circuit board, but I had some questions about the design.
**broken link removed**
The power transistors on the right, all run the motors. Whats the purpose of running so many smaller transistors rather than one larger one for each motor. Cost? Or is there a benefit to this?
The front headlights actually use generated current from the motor. I'm assuming they run on battery power when the car is on, and the motors generate electricity for them when turned and the power is off?
I first tried driving my 6v motors with a TC4424 chip, but they heated up way too much with just 3 seconds of running. I switched to just using simple TIP120's to run it, and these seemed to work, but I only get forward direction. I didn't think about this much, yet, but is there a way to use the TC4424 with the TIP120 to run bigger motors, or should I just go for a more capable h-bridge controller?