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You're right... and I also learned yesterday about pull-down and pull-up resistors, so I'm now looking for two resistors with about 1kOhm to connect the two inputs of the buffer/line driver to GND, and then see if the circuit gets more stable. If that works fine, I'm going to write the relevant data ...

Turns out that the jump wire board I bought seems to be not that good, too. But at least the OPL produces output, now I need to figure out a way to process the data in time...

Hm, OK, I managed to get the PWM pin 3 working at 12 MHz and it's producing a nice sine wave. I tried to hook that up to the 74HCT125, but then I realized I need to change the "working point" of the input, because all I get is either HI or LO, independent of the output enable pin (which I hooked up ...

Now that I own a oscilloscope, it turns out that I'm only generating a 7kHz master clock...

Well, unfortunately not. The only thing I have at hand is a voltmeter, which isn't of any use anymore, because the soldering points are properly connected. It was my first though to also buy an oscillosope, but everything I found was too expensive for the budget I've set. I'll try to play around ...

I'm aware that the current solution is "suboptimal" (to say the least), but the SY doesn't seem to be triggered at all. In fact, I don't seem to get the OPL to do anything at all, as the outputs from the chip are never changing. I'm still trying to get it to do something , and only then I will start ...

Maybe I did something wrong and broke the chips, but could you please help? I wired it all up, with the reset and master clock signals running through the quad buffer chip to amplify them. The quad buffer (HCT125) is powered from the 5V supply from the teensy, and the clock and reset signals are ...

They just arrived, the last two they had in stock
It's a shame that the SMD adapters I ordered here in Germany on the same day haven't arrived yet.

As far as I'm understanding this, the 74HCT125 is basically a combination of 4 op-amps, right? Sounds indeed much more sane than a transistor, I remember a friend talking about the differences some years ago...

And yes, I have a teensy 3.1 with a 5V tolerance on the input pins. I will order a ...

I received my teensy 3.1 a few hours ago, and already love it :D

But I'm a bit concerned about the required minimum master clock voltage of the OPL-3; the YMF262 specs say that the minimum is 3.5V, but the digital output pins only provide 3.3V. Should I connect the Vin power source through a ...