The normal setting (x1.0) goes from about one cycle per 14 seconds to about 100Hz. It has a switch for two frequency ranges. The 7555 is the CMOS version of the NE555, Do NOT use an NE555 in this circuit! The LFO has 4 outputs, one for Sine-, Triangle-, Squarewave and Ramp wave. ![]() This LFO circuit uses the well known ICM7555 chip as main oscillator and two TL074's (or TL084's) to produce the different waveforms. Just take a look at the layout and you'll know what I mean. I seem to be building a lot of Yusynth designed circuits lately but that's because I know they work so well. ![]() ![]() A very useful LFO with synchronization and Frequency Modulation input, using the ICM7555 IC.
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