Friday, 1 August 2025

SiB! Electronics Mr Echo Delay

 Another trace, layout and verification by Jordan Fontaine. A PT2399 based delay but it has a trick upon its sleeve that I haven't seen elsewere, the Slam switch.

 Schematic is avaiable HERE.




 

5 comments:

  1. Layout seems to match schematic, however there's no values for trimmers given (and why VR1,2 and 3 labels don't match to Q1 and 2 and 3 is a little odd). I'm going to guess either 50k or 100k will do for the trimmers.

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    Replies
    1. thanks for catching the error. a corrected layout is posted.

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    2. Thr layout is updated with the correct labels

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  2. What is r51 on the layout mean exactly?? Thanks guys

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    Replies
    1. It just controls the brightness of the LED. Typically 1k-10k

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