Voltage Controlled Dual Low Frequency Oscillator: Difference between revisions
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Assembled/ tested board only: $89.95 | [[Voltage_Control led_Dual_LFO_Board |Assembled/ tested board only:]] $89.95 | ||
Revision as of 17:08, 14 December 2010
The Voltage Controlled Dual LFO is identical to the standard Mattson Dual LFO with the ability to control the oscillator rates independently with an external CV.
CV in: Input jack for the external control CV.
CV amt: Attenuator to control the amount of effect the external CV will have on the oscillator rate.
All other controls: Please see the Dual LFO page for more detailed information.
Data log test using minimum rate with a -5V CV.
Each sample was taken every three minutes.
Each grid square= 1 hour.
Cycle time as shown = 2.5 hours.
With 0V CV, Rate range:
Min (full CCW)=29 seconds
Maximum (full CW)= 1.416 Khz.
With Minimum (Full CCW):
0CV= 29 seconds
+5V CV= 2Hz
-5V CV= 2.5 hours
LFO top end is 1.416 Khz.
Setting full +5V CV and adjusting rate until top end starts to drop:
Max (at 5V CV)= 1.416 Khz
0CV= 55 Hz
Min (at -5V CV) 0.75 Hz
Symmetry range (full CCW to full CW)=6% to 93%
Cycle times for negative CV's:
Rate at Minimum:
0V= 29 seconds (~1/2 minute)
-1V= 60 seconds ( 1 minute)
-2V= 150 seconds( 2.5 minutes)
-3V= 390 seconds( 6.5 minutes)
after this level, the duty cycle starts to shift more positive.
-3.5V 780 seconds (13 minutes)
-4V 1,530 seconds (25.5 minutes)
-4.5V 2,880 seconds (48 minutes)
-5V 9000 seconds (2 hours 30 minutes)
-5.1V Flat lines wherever it is.
-5.2V Slowly increases past +5v limit and stops at PSU supply level.
All values are measured from the bread board.
Availability
This module is currently available. $229.00
Assembled/ tested board only: $89.95
Current draw:
TBD
PCB board dimensions:
3.125" (3-1/8") 79.38mm X 2.625" (2-5/8") 66.68mm
Mounting holes: 0.125" (1/8") 3.18mm (for 4-40 screw) 4 holes, one in each corner
Mounting hole spacing; Length: C-C= 2.925" 74.3mm, Width: C-C= 2.425" 61.6mm