![]() If you want to see what I mean, connect pins 1 and 15 directly to ground and the L298 will burn up. This limits the current to 300mA and means out L298 won't get hotĮnough to burn finger tips. ![]() The L298 will constantly be supplying current to the stepper motor unless you add additional sensingĬircuitry, so make sure you don't forget the 10Ω resistors off of pins 1 & 15, the sense pins. Inputs the L297 decides what outputs should be given to the L298 in order to control the stepper motor properly. The L297 has 4 inputs supplied by the user, a ground, step input (clock), direction and enable. The LM317 uses a voltage divider 240Ω and 720Ω on its output and adjust pins to create this +5v output. While the motor is powered by a raw +12v input, there is a voltage regulator circuit for +5v going to the Stepper motor driver circuit to control 1 piece and 2 piece L297 driver floor L298 (dual full bridge driver) used 4 amp power operating voltage highest 35 volts. The three main elements of the board are (1) the power inputĪnd voltage regulation, (2) the L297 input and outputs and (3) the L298 stepper motor control circuit. The schematic for the board can be seen below.
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