Serpentine Track

[Kody Baril]

Iam currently researching the length matching problem in the PCB EDA domain and am curious as to why tools such as Allegro and Altium primarily use accordion, trombone, and sawtooth patterns to address these issues. Are there any particular reasons for not considering spiral patterns or other alternative patterns in this context?

In Allegro, accordion, trombone, and sawtooth patterns are commonly used for trace detours during PCB design. I'm curious why these specific shapes are preferred and why other shapes, such as spiral patterns like below, are not typically used. Can you provide any insight into this design choice?

Routing space requirements in the majority of pcbs call for a more optimal, direct pattern of flow for tracks. We typically think of usable space in terms of routing channels. For example, if I have 20 tracks to be connected across a horizontal channel of limited vertical width, then the maximum width of that channel is dictated by the largest obstacle in the vertical direction.

Tuning a track in the accordion pattern minimises the physical impediment in the vertical direction which would otherwise reduce the channel width for other tracks. Further additional & subsequent tuning of that track can then be later implemented once again without subtracting more space from the channel width, assuming some additional straight sections of the trace remain available for further tuning. In other words, it is more efficient to add the extra trace length along the direction of travel of that trace. It maximises channel width.

Additionally, there are concerns for higher inductance of the track using the spiral pattern. Spirals are a good pattern for designing inductors into your board: See the video link titled "How to Design Spiral Inductors on a PCB" =-M91ig6o0Uw using the Allegro Productivity Toolbox to do so.

The reserve is about an hour's drive from Alexandra. Drive to Poolburn Dam on Old Dunstan Road and then turn off onto Long Valley Ridge Road. Be aware Long Valley Ridge road can be closed, so contact Central Otago District Council to check it is open before you travel.

The discovery of gold in 1863 transformed this remote area into a vibrant gold-mining town. A settlement quickly sprang up, with two store-hotels, a church, blacksmiths, a cemetery, and huts of sod, wood and thatch with gardens and potato-storage pits. The formed road you come in on follows part of the original dray track used by miners. The Serpentine reached its peak population (150 Chinese and 80 Europeans) around 1873.

The Serpentine stamper battery, used to crush ore from the local mines, has had a nomadic existence. It was erected in 1878 at German Jacks (15 km to the north), then moved in 1882 to the head of Deep Creek (7.5 km south of here) where it was enlarged from five to ten stamps. This immense structure was moved again in 1890 just off this ridge, where it now resides in excellent condition.

The stamper battery and water wheel have been restored. Almost all of the working parts are intact and there is even a gold safe lying nearby. The complex was built in 1882 at the top of the ridge to crush ore from mines in the area. It was moved in 1890 to its current site but it didn't live up to its early promise and was abandoned in 1891. The stamper makes a good lunch stop.

The stamper was supplied with ore via an inclined railway and the line of this should be followed steeply up the slopes of Rough Ridge. The occasional sleeper and rail spike will be found scattered about. From the top of the incline (about 200 m above the stamper) a sledge track is followed on a level grade south to the main mine tunnel with its associated tipping benches. The tunnel is full of knee-deep water.

It has never been done better! March Performance new all billet aluminum Style Track serpentine system is created with a combination of style and low price that is sure to find favor among car enthusiasts everywhere. The highly styled one piece alternator and air conditioning bracket provides a rigid support for the alternator and a/c compressor; a separate bracket allows the option of power steering or no power steering.

Our group runs occur every Wednesday evening (Hyde Park), Saturday morning (Hyde Park), and Sunday morning (Richmond Park), with distances from 7km to 16km. We also organise monthly trail runs in the Home Counties and beyond.

Check out our weekly training sessions! Join our UKA-qualified coaches every Tuesday evening at the Paddington Rec Track (Maida Vale) or try one of our hill training sessions at Primrose Hill, Greenwich Hills and Hampstead Heath. Suitable for all levels.

Training for a triathlon? Improve your swimming at one of our weekly coached pool sessions. Or join one of our group bike rides. Or why not join other triathletes for our annual training holiday in Lanzarote?

Serpentine Running Club, are committed to protecting and respecting your privacy. For any personal data you provide for the purposes of your membership, the club is the Data Controller and is responsible for storing and otherwise processing that data in a fair, lawful, secure and transparent way.

We need to process your personal information to be able to administer your membership, and to provide the membership services you have signed up to when you became a member of the club. Our lawful basis for processing your personal information is that we have a contractual obligation to you as a member to provide the services provided as part of your membership for the club. However, we do not carry out any automated decision making.

If you do not provide us with the personal information necessary, or withdraw your consent for the processing of your personal information, we may not be able to provide the membership services to you.

Summary information is collected automatically by our system e.g. number of visitors to the site. This information is used to monitor use of the web site and will not contain information that can identify you as an individual. Apart from this information, the only other data we collect is from any forms on this site that you may choose to complete.

We undertake not to pass any of your details on to any third party, except where it is required to register you with the relevant bodies to which Serpentine is affiliated, and will only use the information you supply to us for the purpose for which it was given to us.

We collect and hold details of name, date of birth, gender, club, email address and mobile phone number for the purpose of uploading and displaying race results for races we organise. Serpentine members and all athletes entering any Serpentine race consent to this information being stored on our server and for their name, age category and gender to be displayed publicly on serpentine.org.uk. Name, date of birth, gender, club, age category and race result data may be passed to England Athletics, UK Athletics, Powerof10, British Triathlon, Triathlon England, Tri247, BTF London League and similar organisations where necessary to aid in the publicising of race results. All such organisations undertake to never pass any of this data to anyone else.

For those members choosing to register with England Athletics via Serpiebase (all members who wish to compete in competitions held under UKA rules need to do so) Serpentine will transfer your personal data (name, date of birth, gender, club, address, email address, phone number and mobile phone number) to England Athletics. England Athletics will enable access to an online portal (MyAthletics) and contact you to invite you to sign into and update your profile (which, amongst other things, allows you to set and amend your privacy settings). If you have any questions about the continuing privacy of your personal data when it is shared with England Athletics, please contact datapro...@englandathletics.org.

In addition to passing data to EA, Serpentine may share the minimum necessary personal data (name, date of birth, gender, club, age category) with leagues, county associations and other competition providers as necessary for entries to events. All such organisations undertake to never pass any of this data to anyone else.

As part of organising race events for club members, as a condition of entry, Serpentine may require you to upload images and photos to image hosting providers (e.g. Dropbox) for timing verification and other purposes. Entering such races is entirely optional. As an independently run third-party Dropbox may collect and use the information you provide to them according to their own privacy policy.

We may also store information about you using cookies (these are small files which are sent by us to your computer or other access device) which we can access when you visit our site in future. We do this to to verify that you are registered as a user to save you having to login every time you visit the site, and to store some of your preferences such as how to display results.

This web site contains links to other web sites. Please be notified that Serpentine cannot be held responsible for the privacy practices of other web sites. We encourage all visitors to be aware and read the privacy statements of each and every web site that collects personally identifiable information.

Serpentine has the following social media pages: Facebook, Twitter, Instagram. All members are free to join these pages. If you join one of the social media pages, please note that provider of the social media platforms have their own privacy policies and that Serpentine does not accept any responsibility or liability for these policies. Please check these policies before you submit any personal information on the Serpentine social media pages.

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