[sdiy] newbie question: Adding LED to JH Sample & hold schematic

[ganesha]

Hi,

I didn't get any replies to this question.
Is it more complicated than it looks at first sight? 

Can someone perhaps point me in the right direction?


Thanks



----- Original Message -----
From: ganesha <goaqihai at yahoo.co.uk>
To: Synth-DIY DIY <Synth-diy at dropmix.xs4all.nl>
Cc: 
Sent: Thursday, 24 May 2012, 16:09
Subject: [sdiy] newbie question: Adding LED to JH Sample & hold schematic

Hi,

I'm building the JH Synthi Sample & Hold.
http://www.jhaible.de/tonline_stuff/jh_sc_shg.gif
Everything works fine but I'd like to add a LED to have some visual feedback of the clock rate if the internal clock is used (timepot on the left), but also if an external clock is used (in the schematic on the right "from osc 3 pulse").
So I'm guessing the LED should be connected somewhere in the path going to the amp bias input of the OTA at the top of the schematic.
But what is the correct way to add the LED? I want to be sure the circuit keeps working and that the LED doesn't get too much current.

Thanks!

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