Elektra Cranker

Stompboxes circuits published in magazines, books or on DIY electronics websites.

Re: Elektra Cranker

Postby snk » 06 Dec 2018, 10:46

Hi, Manfred,
Thank you. Indeed, your circuit is much simpler :)
I did it this way, because i soldered the diodes and leds directly on the switch (not on the veroboard).
But your circuit seems simpler, and should make the layout better. I need to consider it and figure out how to make it a veroboard.
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Re: Elektra Cranker

Postby snk » 06 Dec 2018, 14:19

Manfred wrote:Hi snk, the double switching of the caps and the diode circuties is not absolutely necessary.

The good thing being that it gets rid of the need of using a 4PDT.
It's very easy for the CAP switch (few components involved), a tad bit messier for the CLIP switch (from the drawings i made, it involved either a much bigger veroboard if the diodes and leds are fitted on the veroboard, or having 12 leds & diodes soldered between the wires and the switch, right ?).


By the way, I am wondering if all the links and the routing to ground i did on the "dual circuit" veroboard is right ? I think the "core" of the circuit is fine, but i am unsure about the way i duplicated it on the veroboard :hmmm:


Last interrogation : could i get rid of the wire on A10 ("EQ lug A2 to ground"), if i solder both 1nF resistors from the second lugs of the dual pot together, (and therefore use only one single wire to ground) ?
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Re: Elektra Cranker

Postby snk » 08 Dec 2018, 12:48

Hello,
This is an updated version of the layout :
- It now uses 2PDT (instead of 4PDT), as Manfred suggested;
- It features every knobs (the circuit uses dual gang knob, but each layer is represented by a single knob).
- I changed the veroboard size a bit (i made some improvements on J & K rows, which i combined : this way, the layout is 1 row more compact, and needs 1 link less). I hope i did not make any mistake :hmmm:
- I changed the wiring a bit, in order to make the circuit a bit less "spaghetti" (the grounds of the dual gang pot are linked together, so there are less wires going from the veroboard to the knobs).

Stavro Crank v4.jpg
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Manfred (08 Dec 2018, 12:54)
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Re: Elektra Cranker

Postby Manfred » Yesterday, 23:29

I made a strip layout where the most components are on the board.
The size is 1.9 x 1.9 Inches.
I have not yet built this board, but I checked it using the trace function of the Lochmaster software.
Please recheck it.
DoubleCrankerVeroConnections.JPG

DoubleCrankerVero.jpg

DoubleCrankerVeroSolderSide.jpg

PDF files for printing the original size:
DoubleCrankerVeroParts.pdf

DoubleCrankerVeroSolderSide.pdf

Lochmaster file:
speakercrankerdouble.zip
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snk (Today, 00:11)
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Re: Elektra Cranker

Postby snk » Today, 08:16

Wow, thank you, Manfred !
I will give it a look :D
This is what i feared : adding diodes and capacitors to the PCB make it much bigger (twice as big at least), and increase a lot the amount of traces and cuts (making me more prone to making errors, ah ah :oops: ).
I will use your layout to compare it against mine, and i might try either yours or mine this week-end if free time allows :)
Again, thank you for yor precious help.
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Re: Elektra Cranker

Postby Manfred » Today, 09:03

I will give it a look :D

Thank you snk!
This is what i feared : adding diodes and capacitors to the PCB make it much bigger (twice as big at least), and increase a lot the amount of traces and cuts (making me more prone to making errors, ah ah :oops: ).

Your are right, that was clear to me.
I will use your layout to compare it against mine, and i might try either yours or mine this week-end if free time allows :)
Again, thank you for yor precious help.

Don't worry about your layout is ok to me.
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