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DIY Stompboxes => Building your own stompbox => Topic started by: eskimoquinn on October 01, 2019, 08:25:31 PM

Title: Scoping a Trem
Post by: eskimoquinn on October 01, 2019, 08:25:31 PM
I would to see the different waveforms that are possible with the trem that I have just built (tremulus lune clone). So I understand how to view the audio signal, but how I would visualize the different tremolo types that are possible with this pedal, e.g. sawtooth, square, sine. How would I do that? 
Title: Re: Scoping a Trem
Post by: MaxPower on October 01, 2019, 08:53:47 PM
With an oscilloscope?

Probe the lfo output.
Title: Re: Scoping a Trem
Post by: eskimoquinn on October 01, 2019, 09:10:13 PM
Ok thats what I figured, I must be doing something wrong. Where on this would you put the probe?



(https://i.postimg.cc/mhCZZ7Jg/Screen-Shot-2019-10-01-at-9-08-39-PM.png) (https://postimg.cc/mhCZZ7Jg)
Title: Re: Scoping a Trem
Post by: Kipper4 on October 01, 2019, 09:15:24 PM
pin 7 IC2B
Title: Re: Scoping a Trem
Post by: eskimoquinn on October 01, 2019, 09:30:02 PM
Perfect...I must have been on the opposite side of the IC.

Thanks all!
Title: Re: Scoping a Trem
Post by: bool on October 02, 2019, 06:10:20 AM
A "true" output method would be to feed the trem a white/pink noise input and scoping the output signal; or a sufficiently high freq. sinewave input and similarly scoping the output. (the sinewave freq. vs trem LFO should be significantly higher so that the evelope would be clearly visible on the scope trace).
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