benie/1u_dual_vca
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Add read me file.

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Kenneth Benzie 2020-06-22 11:31:57 +01:00
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# 1u dual vca
![1u dual vca](/1u dual vca panel.png "1u dual vca")
The 1u dual vca is 6hp in width, it has two channels each forming a row with a
signal input, control voltage input, and signal output jack appearing from left
to right on the front panel. Built around the [AS3360D][as3360] IC, the signal
input accepts 20Vpp, the signal output is 10Vpp, depending on the resistors
configuration each vca will become fully open according to the following table:
| | vca 1 | vca 2 |
|:---:|:-------------------:|:---------------------:|
| 5V | R7 = 30k, R8 = 24k | R12 = 30k, R11 = 24k |
| 8V | R7 = 100k, R8 = 47k | R12 = 100k, R11 = 47k |
| 10V | R7 = 47k, R8 = 47k | R12 = 47k, R11 = 47k |
[as3360]: http://www.alfarzpp.lv/eng/sc/AS3360.pdf