[sdiy] Last question about LFOs

[David G. Dixon]

Magnus, thanks for your comments.  I'm definitely going to increase the
"short" cap size.  Also, based on commentary from the "team", I'm going to
let the LEDs blink.

> I think your short setting is running a little high. While it is cool to
> go a bit up in the audio-range, 360 Hz may be a bit high. I'd definitely
> consider dropping it down. Alternatively have three settings.
> 
> Try the 100 nF, then maybe 220 nF or 330 nF.
> 
> As a side comment, you can make the LEDs blink when only cables is
> connected using a normal diff-opamp setup in which the non-inserted side
> is connected to the - input and the switch input and inserted side goes
> signal and + input. That way, when the connector is unconnected, the -
> input and + input is fed the same signal and essentially cancels in the
> diff-amp setup. When you connect a cable you break the link and the
> cable gets its feeded signal while the cancelation no longer occurs and
> the LED blinks. A transistor pair could play the same trick, but this is
> one way to use a 741 if you have one lying around...
> 
> Yeat a simpler method is to feed the signal on the switch side and let
> the inserted end feed the LED. What works best for you depends a bit on
> the connector.
> 
> But then, I like it when they blink... and it is so much simpler.