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envelope-follower-bissel-based

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Envelope Follower

based on Harry Bissel
a SMD Variant, ready for Pick and Place

–shown 2 identical boards on one pcb - to save money..

Features

* audio in * Envelope out * Gate out + Gate Threshold-Poti
* Full-wave rectifier
* 3 identical Peakdetectors which are Reseted from a “stepper”
* a Osciallator with tunable Frequency to drive the stepper
* Smoothingcap set via Jumper
* Debugging Jumpers
* PTC and Diode Polarity Protection on the Supply-side

Hardware Requirements

  • This Device i build as input module for my CV1 Project, but can be used for other things too
  • Soldering Iron - with a Dip that can Handle SMD-Parts, Wires, solder Paste…
  • Eurorack Power Source +-12V!

Building

The Design is optimized for Pick and Place most SMD Parts are on the Top-PCB
i ordered 5 PCBs from JLCPCP with almost all SMD Parts presoldered(except 2 SOIC chips PTC and Protection Diode)
now waiting for Presoldered PCBs

Frontpanel

FIXME - Eurorack Alu-Plate

BOM LCSC

these are the parts which are presoldered by the Pick and Place Machine, these are “Basic” Parts
the values with a “x” in it, like Dx1 — are because there are 2 Identical Parts on 1 PCB, because there 2PCBs on 1PCB…. so Dx1 is the same like D1, but its position is on the second board.

ValueDesignatorFootprintLCSC Part NumberLibrary-Type
100nFC1,CU1,CI1,CIx1,CUx1,Cx1,CU2,CI2,CIx2,CUx2,CP3,CI3,CIx3,CPx3,CP4,CI4,CIx4,CPx4,C4,Cx4,CI5,CIx5,CI6,CIx6,CI7,CIx7,CI8,CIx8,CI9,CIx9,CI10,CIx101206C24497
1nFC102,Cx102,C103,Cx103,C202,Cx202,C203,Cx203,C302,Cx302,C303,Cx3031206C35216
47uFCP1,CPx1,CP2,CPx21206C96123
1N4148WD1,Dx1,D2,Dx2,D7,Dx7,D8,Dx8,D103,Dx103,D104,Dx104,D105,Dx105,D106,Dx106,D203,Dx203,D204,Dx204,D205,Dx205,D206,Dx206,D303,Dx303,D304,Dx304,D305,Dx305,D306,Dx306SOD123C81598
TL072IC1,ICx1,IC2,ICx2,IC3,ICx3,IC4,ICx4,IC5,ICx5SOIC-8C6961
2N3904Q101,Qx101,Q201,Qx201,Q301,Qx301SOT-23C20526
100KR12,Rx12,R13,Rx13,R17,Rx17,R18,Rx18,R108,Rx108,R110,Rx110,R208,Rx208,R210,Rx210,R308,Rx308,R310,Rx3101206C17900
1KR1,Rx1,R8,Rx8,R11,Rx11,R20,Rx20,Ra21,Rax211206C4410
2KR19,Rx191206C17944
10KR3,Rx3,R4,Rx4,R5,Rx5,R6,Rx6,R7,Rx7,R15,Rx15,R16,Rx16,R109,Rx109,R209,Rx209,R309,Rx3091206C17902
220Rb21,Rbx211206C17958

when making 10Boards…a total of 42,44€ presoledered on the PCBsincl Shipping and Import-Taxes

BOM Mouser

These are the parts which has to be handsoldered
copy list below, and paste in this link, you will need to order the project 2 times since 2PCBs are on 1PCB
583-FM4002|2
490-SJ1-3535NG-GR|3
523-G821EU210AAL10Y|1
650-MINISMDC014F-2|2
771-HEF40106BTD-T|1
595-CD4017BM|1
652-PTV09A-3015FB103|1
652-PTV09A3020FB104|1

for prototyping i ordered:
490-SJ1-3535NG-GR instead of 490-SJ1-3535NG because it is out of stock - so GREEN sockets for now!

when making 10PCBs this make a total of 69,83€ incl Shipping/VAT which is free above 50€!
There are 2 SOICs that have to get Handsoldered, i have done this before and its easy!

the actual Picture is this

Overall Material Costs

PCB:42,44€ + MouserParts: 69,83 = 111,46€ / 10 PCBs = 11,14€ a PCB
(where half off work is done by pick and place machine!)

Kicad Files & Production Files

V1. from 05.01.2021env-follower.zip
Shematic, Board, Gerber, Pick and Place and Booms, ready for Pick and Place!
—at the moment untestet, since i order the project just now!
as Example what you see if you got thru the ordering process:


Shematic


To Do

experiment with the Smooting CAP, i already implimented a Jumper which add a second Capacitor to “double” the capacity… i took 220+220nF, but maybe it is better to use 100+220nF?
experiment with the Frequency Pot which is a lin10K + 2K Serial Resistor which gives a range of 2K-12K - really dont know what value spectrum we need here!
adding some Jumpers to break the circuit for debugging or measurement
frontplate, Debugging First Version

In order to Debug and Test and finetune the board i placed some Headers/Jumpers:

Resources

muffwiggler-topic
modified-shematic
THT-PCB
THT-PCB-Shematic-BUT Attention it is not correct!
THT-PCB-BOM
Haralds-Hi-Clock-Measurements
I give this links because it is the source: but i cant recommend that forum! stay away!

Community users working on it

  • Phatline = Programming, Documentation…

Just let a Private message on the forum to user already involved.
I have ProtoBoards here - i test one, and if it works, i can share them for Beta Testing-if you pay the postage

envelope-follower-bissel-based.1609886175.txt.gz · Last modified: 2021/01/05 22:36 by phatline