* 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
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
- Eurorack Alu-Plate
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|
when making 10Boards…a total of 42,44€ presoledered on the PCBsincl Shipping and Import-Taxes
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
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
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!)
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:
Debugging First Version
experiment with the Smooting CAP: a Header is connected paralell to a integrated 100nF Cap, connect there a CAP to encrease the smoothing
experiment with the Frequency Pot: a lin10K + 1K internal Serial Resistor which gives a range of 1K-12K - i also made a Header here, which you can bridge then you have 1-12K, or you put a resistor there for example a 5K, then you will get a range from 6-16K…
I addet some Jumpers to break the circuit for debugging or measurement
THT-PCB-Shematic-BUT Attention it is not correct!
I give this links because it is the source: but i cant recommend that forum! (deletes of posts, shitstorm, non constructive posts…)
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