Owner manual

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GATE EG OUT
HARD
GATE
TRIGGER
POLIVOKS ADSR
BUILDING INSTRUCTIONS
step
Install pot knobs! Congratulations! You have completed Erica Synths
ADSR envelope generator!
TRIMMING AND TROUBLESHOOTING
     
trimming resistors VR1 and VR2 and check, if they allow tuning from -10V to +10v.
If not, there is something wrong with the assembly or power supplies. Set both
inputs to +2.5V for most general compatibility: at this setting, trig and gate control
voltages below this voltage will be considered low level, and when above - high. This
allows EG to work with +4v, +5v logic and 10V control signals, with inactive state
            
voltages, feel free to set it anywhere in the middle of its span. Say, if your controller
outputs -7 when idle and -4 when active, set the respective trim resistor to -5.5V.
Basically, you have to achieve the situation, when both Gate and Trigger signals

If you wish to modify ADR time, feel free to experiment with value of C3!

Ensure that input signals that you supply to the module are good and knobs are set
to meaningful values. Check external voltage supplies and onboard -10V and +10V
as well as +5V LDOs. Tune the gate and trig input threshold pots. Using an
oscilloscope, check if trig and gate signals from controller appear on respective

see if rotating knobs produce control voltages on the respective multiplexer input

   


knobs is somewhere around -0.65V. If not, there may be something wrong with the
  
Changing release rate in idle state should change voltages at the diodes D2 and D3.
Voltages from OP1.2 and OP3.1 should change in a mirror fashion, accordingly to the
set rate. At the slowest rate cathode of D3 should be around -0.65V while anode of
D2 should be around +0.65V. Increasing the rate speed should increase voltage on
the cathode of D3 and decrease in on anode of D2.
User manual by Girts Ozolins@Erica Synths. Design by Edgars Rasins. Copying, distribution or any
commercial use of schematics, technical solutions and/or parts of the manual in any way is prohibited
