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====== Envelope Follower ======
based on Harry Bissel\\
a SMD Variant, ready for Pick and Place\\
{{:phatline:ENV-Follower-3D-rotate.png?500|}}\\
--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\\
{{:phatline:ENV-Follower-PCB.png?500|}}\\


==== 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.\\
^Value^Designator^Footprint^LCSC Part Number^Library-Type^
|100nF|C1,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,CIx10|1206|C24497|
|1nF|C102,Cx102,C103,Cx103,C202,Cx202,C203,Cx203,C302,Cx302,C303,Cx303|1206|C35216|
|47uF|CP1,CPx1,CP2,CPx2|1206|C96123|
|1N4148W|D1,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,Dx306|SOD123|C81598|
|TL072|IC1,ICx1,IC2,ICx2,IC3,ICx3,IC4,ICx4,IC5,ICx5|SOIC-8|C6961|
|2N3904|Q101,Qx101,Q201,Qx201,Q301,Qx301|SOT-23|C20526|
|100K|R12,Rx12,R13,Rx13,R17,Rx17,R18,Rx18,R108,Rx108,R110,Rx110,R208,Rx208,R210,Rx210,R308,Rx308,R310,Rx310|1206|C17900|
|1K|R1,Rx1,R8,Rx8,R11,Rx11,R20,Rx20,Ra21,Rax21|1206|C4410|
|2K|R19,Rx19|1206|C17944|
|10K|R3,Rx3,R4,Rx4,R5,Rx5,R6,Rx6,R7,Rx7,R15,Rx15,R16,Rx16,R109,Rx109,R209,Rx209,R309,Rx309|1206|C17902|
|220|Rb21,Rbx21|1206|C17958|\\
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\\
[[https://www.mouser.com/tools/part-list-import.aspx|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|3\\
523-G821EU210AAL10Y|1\\ 
650-MINISMDC014F-2|2\\
771-HEF40106BTD-T|1\\
595-CD4017BM|1\\
652-PTV09A-3015FB103|1\\ 
652-PTV09A3020FB104|1\\
\\
when making 10PCBs this make a total of **53,58€** incl Shipping which is free above 50€!\\
There are 2 SOICs that have to get Handsoldered, i have done this before and its easy!\\
{{:phatline:env-follower-handsolder.png?500|}}\\

===== Overall Material Costs =====
PCB:**42,44€ +** MouserParts:**53,58** = 96,02€ **/ 10** PCBs **= 9,602€**\\
(where half off work is done by pick and place machine!)\\

===== Kicad Files & Production Files =====
V1. from 05.01.2021{{:phatline:env-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!\\
===== Shematic =====
{{:phatline:ENV-Follower-Shematic.png?800|}}\\

===== 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\\

===== Resources =====
[[https://www.muffwiggler.com/forum/viewtopic.php?f=17&t=109067#p1511975|muffwiggler-topic]]\\
[[https://www.muffwiggler.com/forum/userpix2/10917_6768_bissell_ef_schematics_11_1.jpg|modified-shematic]]\\
[[https://www.muffwiggler.com/forum/userpix2/10917_harrybisselenvfollow_5.jpg|THT-PCB]]\\
[[https://www.muffwiggler.com/forum/userpix2/10917_bissel_1.jpg|THT-PCB-Shematic-BUT Attention it is not correct!]]\\
[[https://www.muffwiggler.com/forum/userpix2/10917_bom_1.jpg|THT-PCB-BOM]]\\
[[https://www.muffwiggler.com/forum/userpix2/32564_scr01_2.png|Haralds-Hi-Clock-Measurements]]\\

====== 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\\
MIDIbox

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