These are used in the Su x911 for phase effects surround sound etc.
I had LOADS of shit NOT getting these to amplify as an amp before doing this circuit - I can only assume bad board connections as the same IC oscillates fine for this! Another wasted day...
Taken from this first output for square waves and used to drive LEDs:
I modified it for visible flashes with 4 x 1ouF caps (capacitance adds across all 4 outputs so slows the time constant) at each amp section and a 390R from each output feeding an LED to ground (0V)
The dual PSU for these ICs is +/-8V-20V or so.
