On the left side, I connected the wires to the input instead of the output for testing purposes. On the right side I connected the 3 wires to the output, but for some reason it is always 0.5V.
By schematic you must mean the screenshot in the OP. As for the code: I'm controlling floppy drives and this works without a driver up to 20 drives. For more, I need a driver, but then it doesn't work at all. The input is a sound signal and the output is constant 0.5V, but I don't understand why.
Yeah sorry, got lost following those wires around, usually there's a written plan on paper or something
Your not applying the sound signal to the input right? Its for either a logic high or low input not a varying ac signal
the output is digital in a sense, each part of the hbridge is fully on or off not amplifying
I don't know how the floppy drives work with an ac signal but maybe im getting the wrong idea somewhere,
if you want to amplify an analog signal then maybe you could look into using a transistors or mosfets in the linear region to amplify the ac
And I'm not using an analog audio signal. Instead I'm using a 50% duty cycle digital signal for the input and expect the same for the output only with higher current.
Btw: On the right side, the 3 wires are not connected to the IC output but to the arduino pins directly, which works. But once I connect them to the IC output, it doesn't work.