HLFO - Utility Modulation Source for Eurorack

The HLFO (haptic low-frequency oscillator) is a 10HP module for Eurorack modular systems.  The core of the module features a voltage-controlled LFO.  The rate and amplitude of the LFO can be controlled with the on-board FSR, or external control voltages can be used.   The LFO features triangle, square, and random (S&H) output waveforms.  The sample and hold generator samples the HLFO's internal noise source, to generate a random waveform.  The internal S&H generator has its own separate output (pre-VCA) and can sample any external voltage source by plugging into the SRC jack.  The HLFO's S&H can be externally clocked by plugging into the CLK jack.   The NOISE output features a white noise generator (5Vpp).  The on-board touch sensor (FSR) has an output range of 0 to 5VDC.  The FSR signal is normalized to the RATE and AMP controls.  Plugging into the RATE or AMP jack will disconnect the FSR from that control.   The HLFO has a rear panel jumper to select the speed range of th