Content for MX1508


The MX1508 from Shenzhen Guanghui Electronics Co., Ltd. has a working voltage of 1.8-5Volt, but can drive motors with an operating voltage of 2-9.6 Volt. The module however, has only 1 Voltage input, that supposedly can take 2-10 Volt. The digital part of the MX1508 however is fed through a 220 ohm resistor with the resulting voltage being capped by what I presume to be a zenerdiode of 5 Volt. With most hobby motors being either 6 or 12 Volt, 10 Volt may not be the most practical voltage. When analyzing the PCB, one odd thing becomes clear: Pin 4 (VDD1), the input for the operating voltage of Motor A, seems to be not connected to anything. Yet the module works. Connecting it seems the right way to go though. It is very well possible that it is an unintentional mistake in the PCB.