L-125 Harmonics LFO (4HP)

L-125 Harmonics LFO module for Eurorack/Doepfer A100 system.

From top:
rate knob + CV input jack
harmonics 1 select knob + “even” LED
harmonics 1 level knob
harmonics 2 select knob + “even” LED
harmonics 2 level knob
output jack + 2 polarity LEDs

L-125 is sinusoidal LFO, rate range of fundamental is from over 5-minute period to 30Hz. Two of harmonics (selectable in range from 2nd to 12th) can be added to fundamental frequency in ratios set by theirs level knobs. Jumper header set = harmonics are added with no phase shift (0°), jumper header removed = first harmonics is added to fundamental with 90° phase shift, second harmonics with 180° phase shift. LEDs at select knobs lights if “even” harmonics is selected. Rate knob works as attenuator for input CV if rate CV jack is plugged-in.  Under about 1Hz (= slow rates) rate LED blinks dimmed/full brigthess to show LFO is still moving (output changes really slowly). Output level 10Vp-p (-5 to +5V), distortion of fundamental sine under 0,2% (quite good for LFO).

Examples of output waveshapes:

Width: 4TE/ 4HP/ 20mm
Depth: 45mm /1,8″ max.
Current: 35mA max.
Power cable included

Double check power connection before powering your system please.
„Red strip“ means -12V connector side in Eurorack standards.
In some power distribution systems connector key can be reverted.
In this case cut connector key and plug power connector right way (with respect to red strip) or use different power cable appropriate to your power system