[sdiy] Euro Synth Spec
Kylee Kennedy
kmkennedy at gmail.com
Mon Oct 23 06:27:09 CEST 2017
I also agree that boxed-keyed headers is the way to go. Visibly
writing -12V Red Stripe is also smart. These are things I do regularly
on my own designs.
I'm afraid you can't really plug one on offset. I've tried and there's
too much excess plastic around the outside of the female header to do
that without force and bending neighboring pins.
I would toss out any backwards pinned cables also. This is an
interesting thread just to see the different
approaches...unfortunately we'll never have one universal reliable
quality standard for Eurorack.
Kylee
On Sun, Oct 22, 2017 at 1:49 PM, Laurie <elby_designs at ozemail.com.au> wrote:
> Hello,
> you can also put them in offset - harder but still possible.
> the boxed header approach works on all designs without circuit modification
> and if introduced now would fix existing products (yes it would mean
> discarding those illegal cables!). Adding components requires module designs
> to be changed, not simply changing the BOM for a different component
> value/type, but physically redesigning the board to include additional
> components. that is only a forward approach and would only help any new
> designs. It would not help older modules
>
> ---
>
> Best Regards
>
> Laurie Biddulph
> Mobile: +61 0400 257 645
> Phone.: +61 02 4340 0938
> Web...: www.elby-designs.com
> Skype.: widgetoz
>
> ELBY Designs
> 9 Follan Close
> Kariong
> NSW 2250
> Australia
>
> ABN: 70 022 727 605
>
> 2017 - Year of the Euro-Serge Rooster
>
> On 23/10/2017 5:44 AM, Kylee Kennedy wrote:
>>
>> Having a reversable header fixes the problem of people blowing up their
>> modules. I’m not getting why that’s a bad idea and why we should all use a
>> “Universal standard specific”? It uses the same headers Eurorack has used
>> since Doepfer decided on it. The only issue people are having is plugging
>> the damn thing red strip up and burning out their modules.
>>
>>
>> If we want to talk about designing a better more stable, professional,
>> clean, laboratory power supply and solid power connections cool. But I’m
>> only witnessing one major issue with the current format and thats plugging
>> in a header backwards. I made a suggestion that would work to solve
>> that...fuses and protection diodes would be another approach.
>>
>>
>> Kylee
>>
>>
>>
>>
>> On Sunday, October 22, 2017, Laurie <elby_designs at ozemail.com.au
>> <mailto:elby_designs at ozemail.com.au>> wrote:
>>
>> No they shouldn't, they should use a single recognised 'universal'
>> 'standard' 'specified' connector.
>> Once again people are 'closing the door after the horse has
>> bolted'. Fix the problem so it can't happen in the first place.
>>
>> ---
>>
>> Best Regards
>>
>> Laurie Biddulph
>> Mobile: +61 0400 257 645
>> Phone.: +61 02 4340 0938
>> Web...: www.elby-designs.com <http://www.elby-designs.com>
>>
>> Skype.: widgetoz
>>
>> ELBY Designs
>> 9 Follan Close
>> Kariong
>> NSW 2250
>> Australia
>>
>> ABN: 70 022 727 605
>>
>> 2017 - Year of the Euro-Serge Rooster
>>
>> On 22/10/2017 2:11 PM, Kylee Kennedy wrote:
>>
>> Neutron Sound has a reversable header on his newer modules.
>> His designs are open source so people should borrow it and use
>> it in their own designs.
>>
>>
>> Kylee
>>
>> On Saturday, October 21, 2017, Mike HEQX <mike at heqx.com
>> <mailto:mike at heqx.com>> wrote:
>>
>> Why can't gear run on anything you plug in either polarity
>> dc or
>> ac. Using a diode bridge as protection should allow you to do
>> this. Some of my gear will run on anything you plug in. I
>> love that.
>>
>> On 10/21/2017 5:59 PM, axisair at comcast.net
>> <javascript:_e(%7B%7D,'cvml','axisair at comcast.net');> wrote:
>>
>> Two parallel diodes reverse biased won't short out the
>> supply,
>> they just wont allow current to get to the circuit.
>> For the price of about $0.015, I just use four 1N914
>> small signal
>> diodes in a full wave bridge configuration. That just
>> supplies
>> the correct power to the rest of the circuit
>> regardless of if the
>> polarity is reversed. The voltage drop from the mains
>> is 0.6V to
>> 0.7V per leg. Minimal drop considering the existing
>> overhead.
>> Since they're small signal diodes, they can handle
>> around 1/3A
>> and have less reverse bias leakage (and cost less)
>> than 1N40XX
>> series. They also double as a fusible link if the
>> circuitry faults.
>> Obviously, if they connect everything correctly, two
>> diodes just
>> sit there.
>>
>>
>> Sent from XFINITY Connect Application
>>
>>
>> -----Original Message-----
>>
>> From: pete.hartman at gmail.com
>> <javascript:_e(%7B%7D,'cvml','pete.hartman at gmail.com');>
>> To: mskala at ansuz.sooke.bc.ca
>> <javascript:_e(%7B%7D,'cvml','mskala at ansuz.sooke.bc.ca');>
>> Cc: synth-diy at synth-diy.org
>> <javascript:_e(%7B%7D,'cvml','synth-diy at synth-diy.org');>
>> Sent: 2017-10-21 2:41:48 PM
>> Subject: Re: [sdiy] Euro Synth Spec
>>
>> And in that latter case usually we put ptc fuses in
>> line as well
>> so we DON'T actually damage the supply or other modules.
>>
>> I do diy, not commercial modules, but the same logic
>> applies.
>>
>> On Oct 21, 2017 3:24 PM, <mskala at ansuz.sooke.bc.ca
>>
>> <javascript:_e(%7B%7D,'cvml','mskala at ansuz.sooke.bc.ca');>>
>> wrote:
>>
>> On Sat, 21 Oct 2017, Ben Bradley wrote:
>> > Do many or any Euro modules have reverse-polarity
>> protection? It seems
>> > easy enough to add a series Schottky rectifier
>> in series
>> with each
>> > power line, but it adds parts cost and drops a
>> little
>> voltage where
>> > people are already thinking the 12V supplies
>> should be 15V.
>>
>> Many; not all. Some do it in other ways, such as with
>> parallel diodes
>> that will be reverse-biased in normal operation and
>> effectively short out
>> the power supply when the connection is backwards.
>>
>> --
>> Matthew Skala
>> mskala at ansuz.sooke.bc.ca
>>
>> <javascript:_e(%7B%7D,'cvml','mskala at ansuz.sooke.bc.ca');>
>> People before principles.
>> http://ansuz.sooke.bc.ca/
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