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CGS Serge extended ADSR envelope generator (view source)
Revision as of 09:40, 17 May 2019
, 5 years agono edit summary
(Created page with "thumb|center|600px| '''CGS116''' the '''CGS Serge extended ADSR envelope generator''' is based on the Serge Extended ADSR. In addition to the...") |
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=== VER1.1 ===
The transistor outlines on the PCB are consistent with PN versions of the 2N/PN3565 and 2N/PN4248, and are now
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* Serge's comments re the curious arrangement of R15a 47 ohms in series with R15b 82k: "The curious 47 ohm resistor I remember leaving in the schematic as a means to do in the field adjustments of the total resistance. This had to do with making sure the switching between linear vs exponential decay slopes could be optimized if need be. As it turns out, I never had to do this. So the 47 Ohm resistor can be deleted!" So you can use a 47 ohm, or a piece of wire.
* The capacitors marked with * are additions to the original design to ensure op-amp stability.
* Transistors and op-amps can be substituted as outlined in the parts list. T1 and T2 should be matched. T3 and T4 should be matched. With modern manufacturing
* A 1k resistor is specified as the LED resistor. If you use a superbright LED, this value should be increased, to as much as 33k, dependent on the individual LED.
* Pot values are not critical as they are only used as voltage dividers. Anything between 10k and 100k will work.
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