Cgs synth

Hello,

I'd like to add LEDs to the Pulse Divider outputs of the CGS36
module. Looking at the diagrams for the Boolean modules, it appears
that I can just strap an LED betweend the buffer transistor's output
and the resister following it. Since the divider's buffers are NPN
instead of PNP, would I need to reverse the LED's polarity?

Romeo

>Hello,
>
>I'd like to add LEDs to the Pulse Divider outputs of the CGS36
>module. Looking at the diagrams for the Boolean modules, it appears
>that I can just strap an LED betweend the buffer transistor's output
>and the resister following it. Since the divider's buffers are NPN
>instead of PNP, would I need to reverse the LED's polarity?
>
>Romeo

No. The LED remains facing the same way (anode to the transistor). Use the
680R/820R combo for the reisitors too, unless you have already soldered them
in, in which case, bung a 1k across each of the 100k pulldowns.

The difference between the transistors are as follows:
The PNPs are used as a switch.
The NPNs are used as emitter followers. (notice the lack of any base resistors)

Ken
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Ken Stone sasami@...
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