Voltage Controlled Dual Low Frequency Oscillator: Difference between revisions
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[[Image:VC-Dual-LFO.jpg]] | [[Image:VC-Dual-LFO-3.jpg|400px|Voltage Controlled Dual Low Frequency Oscillator]] | ||
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. | |||
==Availability== | '''CV in:''' | ||
This module is | 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 Low Frequency Oscillator |Dual LFO]] page for more detailed information. | |||
[[Image:VCdlfo_low_test.JPG|400px|Low Frequency Data log]] | |||
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. $250.00 | |||
[[Voltage Controlled Dual Low Frequency Oscillator Board |Assembled/ tested board only:]] $105.00 | |||
'''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 |
Latest revision as of 17:55, 7 June 2014
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. $250.00
Assembled/ tested board only: $105.00
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