The Final School

4WD scale car racing have resurrected lately with tournaments held in several malls to boost up its popularity by enticing hobbyists and enthusiasts with exciting prizes and technically-interesting car kit builds. One will certainly be piqued with why these small but expensive scaled cars would gain such interest that kids and adults alike would spend hundreds of hours and huge sum of money building kits and joining serious car racing competitions.   Definitely, a serious hobbyist would spend time and effort learning the cars and its parts inside out, but a scale car enthusiast would perhaps not bother with details and just go ahead a buy a stock car or a pricey custom-built one. What I that I learned in this hobby is that a winning car’s performance is totally dependent on the non-stock parts added to custom car – among which is the dc motor speed controller kit. The car’s performance is dependent on the speed controller of the motor, the dc motor is one of the most important parts of the custom car kits. A dc motor’s speed can be controlled by attaching a custom controller kit with front panel adjustable speed control to optimize the motor and obtain low speed from a DC motor without sacrificing torque, depending on the track. Another function of this small factory-assembled controller kit is to keep the dc motor from stalling when the motor reaches its high load cycle by controlling its pulse width modulation, eliminating the series dropping effect by using integrated circuits for pulse with a power FET transistor. To slow down the motor by applying a lower voltage input or by increasing the speed with higher voltage input, the adjustable speed controller kit can also have jumper selector for variable voltage selection is used.