Hermida Audio - Zendrive [ goop-alarm ]

Jone the Bone · Post by **Jone the Bone** » 29 Apr 2010, 17:02

quaternotetriplet wrote:
Jone the Bone wrote:Here is my d.i.y Zendrive -version:

zentone.jpg
how did you finished it?? looks like authentic..

Well... there are some similarities compared to the original. That´s why I named it Zentone, not Zendrive.

First, I painted the metal enclosure with black paint. After that I attached a thin, clear aluminium plate on the enclosure with two-sided tape. All the prints I created with AutoCad -computer program and printed it with a laser printer on a transparent sticker. After that I pressed the sticker on the aluminium plate, drilled all the holes and sprayed a thin layer of matte lacquer to protect the sticker.

This might be the easiest way to get good lookin' prints on d.i.y stomp boxes. The only problem might be finding the transparent laser sticker. It´s possible to use inkjet too, but laser print is much more stronger and long-lasting.

highway jones · Post by **highway jones** » 29 Apr 2010, 18:25

Any ideas what might have gone wrong here before I probe? I built this one a while back and it was working great. I recently placed it into an enclosure and now I am getting full-on distortion and the tone and gain pots have no affect on the tone and gain. The distortion is actually more than the pedal gives in it's regular working condition and it is rather compressed and pleasing. (If I can figure out how the hell I got to this point, I might make this mistake a switchable mod!).

Below is the layout I used..

jfk1063 · Post by **jfk1063** » 07 Jun 2010, 10:47

Hi,
I have build the zendrive kit from uk-electronic.

http://uk-electronic.de/onlineshop/prod ... e4bfd1fde4

Can someone explain to me why it has an additional 10uf, 5.6K, 390 (for led?) and 1N4001 is for? I compared it to the vero and madbean lay-outs.

I tried to show it in the pcb board picture. I don't have a better schematic or better lay-out.

Thanks!!

IvIark · Post by **IvIark** » 07 Jun 2010, 11:24

The diode will be for reverse polarity protection and cap will be a filter for the supply. Like you said the 390R will be current limiting for the LED.

jfk1063 · Post by **jfk1063** » 07 Jun 2010, 11:40

IvIark wrote:The diode will be for reverse polarity protection and cap will be a filter for the supply. Like you said the 390R will be current limiting for the LED.

Thanks!
Is there a reason why Uk-elec uses an extra filtercap? Is it useful soundwise?

IvIark · Post by **IvIark** » 07 Jun 2010, 11:52

Does it have a 100uF in there as well as per the diagram above? If so I can't see it making much difference. Sometimes makers put a smaller value polyester cap in parallel with a larger electrolytic cap because electrolytics don't filter higher frequencies very well. I can't see much point in having two electrolytics in parallel though.

roseblood11 · Post by **roseblood11** » 07 Jun 2010, 11:57

The 10µF is part of the LED´s power supply, have a look at the schematic.

jfk1063 · Post by **jfk1063** » 07 Jun 2010, 12:01

roseblood11 wrote:The 10µF is part of the LED´s power supply, have a look at the schematic.

Ok, thanks and the 5k6?

jmorrero · Post by **jmorrero** » 08 Jun 2010, 04:39

Here is my zen inspired OD (year 2010)

Video demo (crappy playing)

Greg · Post by **Greg** » 08 Jun 2010, 04:46

Wow.. you even sanded the opamp.
Now that's a accurate clone...

jmorrero · Post by **jmorrero** » 08 Jun 2010, 04:47

Greg_G wrote:Wow.. you even sanded the opamp.
Now that's a accurate clone...

quaternotetriplet · Post by **quaternotetriplet** » 08 Jun 2010, 05:51

jmorrero wrote:
Greg_G wrote:Wow.. you even sanded the opamp.
Now that's a accurate clone...

nice build..

mictester · Post by **mictester** » 08 Jun 2010, 06:11

jfk1063 wrote:
IvIark wrote:The diode will be for reverse polarity protection and cap will be a filter for the supply. Like you said the 390R will be current limiting for the LED.
Thanks!
Is there a reason why Uk-elec uses an extra filtercap? Is it useful soundwise?

The 10µF is in the LED circuit, to prevent switching noises and the 5k6 is the main current limiting resistor for the LED.

jmorrero · Post by **jmorrero** » 08 Jun 2010, 06:52

quaternotetriplet wrote:
jmorrero wrote:
Greg_G wrote:Wow.. you even sanded the opamp.
Now that's a accurate clone...

nice build..

Thanks bro

kungpow · Post by **kungpow** » 08 Jun 2010, 22:55

@ jmorrero - that's a nice looking build!

So, what op amp did you use? Or is that the whole point

Is the top an adhesive decal? Looks very pro

jmorrero · Post by **jmorrero** » 09 Jun 2010, 02:15

kungpow wrote:@ jmorrero - that's a nice looking build!

So, what op amp did you use? Or is that the whole point

Is the top an adhesive decal? Looks very pro

Some of my opamp collection

Original Zen circuit

quaternotetriplet · Post by **quaternotetriplet** » 09 Jun 2010, 04:17

jmorrero wrote:
kungpow wrote:@ jmorrero - that's a nice looking build!

So, what op amp did you use? Or is that the whole point

Is the top an adhesive decal? Looks very pro
Some of my opamp collection

Original Zen circuit

wow even the way the
parts are placed is almost the same.. grabe ka sir jim!

bucksears · Post by **bucksears** » 10 Jun 2010, 18:18

I recently built my Zen-clone with 2N7000's, 1N34A's and a TL072.
I love the sound of it so far, but need to change out the log tone pot for a lin; I'd love a pinch more gain, too.

Can anyone tell me what the difference might be if I used BAT41's and 4558?

Thanks,
Buck

fosnal1950 · Post by **fosnal1950** » 11 Jun 2010, 07:53

I'd love a pinch more gain, too.

So I put in a switchable 470K resistor behind the 500 K pot ;it doubles it and the gain goes up !
I like this mod especially to be able to switch between singecoil and humbucker guitars.

tuck · Post by **tuck** » 16 Jun 2010, 13:15

Can some one please reupload beans layout? I can't find it anywhere

Hermida Audio - Zendrive [ goop-alarm ] [traced]