Hi, I am new to the electronic circuitry stuff. I Badly need some expert advice and guidance. What I am trying to do is to mod a RC car., use the Arduino Mega to control the speed and direction of the car. I followed these two tutorials. For speed control: https://learn.adafruit.com/downloads/pdf/adafruit-arduino-lesson-13-dc-motors.pdf and for direction control: https://learn.adafruit.com/adafruit-arduino-lesson-15-dc-motor-reversing/breadboard-layout. Both of them work very well on a small RC car with small motor.
Now I want to use the same circuity design on a much bigger RC truck. This RC truck has much bigger motor and battery. The battery is 9.6 V 1250mA NiMH. I used the same circuitries from the tutorials, Needless to say, the L293D chip and the PN2222 transistor couldn't handle the high current, they were all fried!
My question is what components I need to use the same circuits but can handle such high current?
Any advices and suggestions will be greatly appreciated as always. :)