Hello! I am trying to construct an acoustic levitator for a school project using an arduino nano and a dual DC motor drive. I'm basically doing the TinyLev/BigLev/etc. type of levitator--in fact, I've basically followed the instructions on the Github page for that. However, since the H-bridge I initially used for the smaller levitator was overheating when I tried to power the larger device and go to a higher voltage, I ordered a new device. But when wiring it to my Arduino Nano like so:
I run into the problem that I see no voltage on my output wires. That is, the red diode on the Nano is glowing, as are the two green diodes on the dual DC motor driver, but my voltmeter shows 0 voltage drop across the output to the acoustic levitator's transducer array. Can any of you please help me understand what about the new DC motor drive is different, and why this is causing me a problem when I try to just substitute it in?
Thank you. But before I go read it, tell us what you think is the difference between your old board and this one and how you have it wired differently fro the old one. Have you made any program changes for the new board?
the old board was rated for lower voltage and power. It had only four pins (IN1-IN4) rather than 10, but I don't think this is the main issue since in each case I'm not wiring anything to the EN1 or EN2 pins (the old board had two slots labeled ENA and ENB, but I didn't use those).
I did not make any program changes. Fundamentally, this should just be feeding a 40 kHz signal in, and I didn't see anything in the original .ino file that would seem to be affected by the new H-bridge. That .ino file can be found here:
