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Introduction Very easy to use & install NMEA combiner & multiplexer. Ideal if you want to combine multiple NMEA 0183 devices with equipment like phones, chart plotters, PCs, laptops and tablets.

And then view your marine data wirelessly anywhere on your boat. Combines 1 SeaTalk. and 3 NMEA inputs into 1 wired NMEA or wirelessly output. The ideal way to consolidate all your marine data. NMEA Combiner / Multiplexer for small-commercial, leisure, sailing, pleasure and fishing boats.

The QK-A031 is a very sophisticated NMEA 0183 multiplexer & combiner that has three NMEA 0183 inputs (listener-ports), one SeaTalk1 input, one NMEA 0813 output (talker-port), a WiFi interface and a USB port to connect to host devices. The built-in SeaTalk™ to NMEA converter translates SeaTalk data into NMEA sentences. This data is then combined with NMEA data received on the other inputs. SeaTalk is converted into NMEA sentences but not vice-versa. The SeaTalk bus is a single-cable system and connects all instruments serially. Only one SeaTalk input is needed.

A effective way to view all your marine data combined wirelessly anywhere on your boat to your mobile phones, tablet and laptop (with the added option to connect to a NMEA chart plotter). Features. Multiplex up to three NMEA 0183 input devices. Galvanically isolated NMEA and SeaTalk input ports. Configurable baud rates: (4.8, 9.6, 38.4k input and output). Differential NMEA output with galvanically isolated protection. Simultaneous wireless and USB output.

The internal WiFi access point connects up to 4 devices simultaneously. SeaTalk to NMEA 0183 protocol converter.

Wide power supply voltage: DC 9-35 Volts. Can connect to Garmin products through our Garmin Bridge (AS03).

Compatible with Windows 7,8,10,Mac OS X, Linux systems, Android and iOS Easy to Install The NMEA Combiner / Multiplexer is ideal for all small-commercial, leisure, sailing, pleasure and fishing boats. The QK-A031 has the following electrical connections/indicators:.

SeaTalk input connector. NMEA input. NMEA 0183 output. WiFi Interface. The wireless connection can always be checked with TCP/IP port monitoring software as shown in the application notes and the SSID and password can be changed through QK-A031 configuration APP, increasing security and memorability. QK-A031 can connect in Ad Hoc (peer-peer mode) or Station Mode (through a router) by selecting the mode and specifying the SSID and Password. LED lights.

Which indicate power (8), NMEA In (2,3,4) NMEA out (5) and SeaTalk (1) status respectively. USB connector. Function diagram Will you need a Garmin Bridge?

A garmin bridge is designed to connect an AIS Receiver or Multiplexer to Garmin type devices A garmin bridge is easy to install using a simple ‘Plug ‘n’ Play’ connection with no setup or configuration needed. You will probably need one if you are connecting to a Garmin Device or some Raymarine Products. How to check: The easy way to check is to have a look at the device output connections you will be connecting the multiplexer to. You will need a garmin bridge if the connections on the device (Chart plotter, depth reader, etc.) have a TX, RX or GND connection. If in doubt contact us for advice Download Config tool can be downloaded. Application note can be downloaded. Packing list Quark-elec order number is QK-A031.

In the package, you will have: QK-A031 module with enclosure and one USB cable. If you have any technical questions regarding this item, please go to the Quark-elec website and leave your question on the forum, it's the quickest way to get a reply. Note: This product has been well tested in the UK before dispatching to customer. Please make sure you understand how to use it before purchasing from us. For international shipping, VAT and other import or handling fees may be applied by your local customs. These are the responsibility of the recipient. We will always declare the purchase price excl.

All technical questions please email to info@quark-elec.com. Alternatively, you can visit to find your answer. Returns policy We have a 30 days refund policy. We will accept returns within 30 days, however, please be aware the buyer pays the return postage. If you do not accept these terms, we will not be able to refund the product. I purchased this multiplexer to simplify the construction of a navigation and performance computer for my 29' Moser M2 sailing boat. When I started the project I used an Arduino to do the data acquisition and performance calculations for display on a 7' TFT screen.

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Since the serial data acquisition (NMEA-0183) was completely asynchronous, the software soon became rather cumbersome and unreliable. The QK-A031 simplified everything, providing a single stream of NMEA-0183 sentences for parsing and data extraction. The Arduino is still used to perform the parsing, compute the performance parameters, drive the TFT screen and synthesise NMEA sentences to drive NASA Marine gauges.

The NASA Marine Steering Compass is driven in a standard way, while the NASA GPS Repeater is used in a nonstandard way to indicate the course to steer for best speed based on wind conditions and the boat polar curves. Overall, I am very happy with the multiplexer which worked straight out of the box. Company shipped me a defective unit which did not output any data. When I complained and asked for exchange/refund, they wanted me to pay to ship their defective unit back to them (I had already paid to have it shipped to me).

They eventually agreed to give me a refund of the purchase price of their defective product, but only after I paid to ship it back. They then refunded me the return shipping, but not the original shipping that I paid for them to send me a broken product. Never mind my time and aggravation of installing, deinstalling, and shipping their defective product. Don't waste your money.

Spend a little more and buy one of the other similar products out there that actually work, while avoiding all this hassle. Obviously we would not knowingly ship anyone a defective unit! It is normal policy in the UK, where we are based, for the buyer to pay for return shipping if they are unhappy with the product.

This product does require that the owner pays attention to how it is being wired in and connected to other items in the network as, like most electronics, it is sensitive to being misconnected. There are extensive application notes with comprehensive installation instructions available both on the CD that ships with all our products and also available to download on our website. We do like to have the units back on the rare occasion that they fail so that we can investigate why there has been a problem. We find that most people are supportive of our efforts to improve and develop our products, and the feedback we receive about our customer service is overwhelmingly positive.

However, as someone once said, you can't please all the people all of the time, and we are very sorry that you feel we could do better. We strove to meet your high expectations, and we fell short, all we can do at this point is apologise. Quark-elec started as a leading professional production consulting company specializing in lab testing, compliance certification, production inspection, factory audit, cost analysis, and business intelligence solutions to management. We offer international buyers a basket of integrated services to bring more confidence, security and knowledge in ordering from Far East factories.

Through every step of the process, Quark-elec has the expertise and professionalism to prevent surprises. Quark-elec started to provide our own brand electronics products from 2014 based on our 12 years cultivating in electronics design industry. We aim to provide the industrial standard products with affordable prices.

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Matt Elliott/CNET Welcome to Mac Mondays! Each Monday, the team at CNET How To goes in-depth on ways you can improve your. We'll talk performance upgrades (for old and new models), hardware hacks, and workflow tips. This is where you'll go to find out how to release your Mac's potential and make the most of your purchase.

Despite repeatedly pleading with my kids (followed by warnings and the occasion threat), I rarely get my iPhone or iPad back from them in the same state as I lent it out. They change the wallpaper, rearrange app icons and folders, and generally mess with my settings each time they are allowed 'screen time.' My kids ask to use my MacBook Pro less frequently, but when they do, they have their own user accounts so they can select a new wallpaper image as it strikes their fancy while also being restricted from certain corners of the Web. If you have a Mac at home that's shared among family members, I suggest you take a couple of minutes to create multiple user accounts.

Adding accounts To get started, open System Preferences and select Users & Groups. Next, click the lock icon and enter your password in order to make changes. Screenshot by Matt Elliott/CNET To add a new user, click the ' +' button that's above the unlocked lock icon in the lower-left corner. You can select one of four different account types: Administrator: can add and manage other users, install apps, and change settings. The first account you created when you set up your Mac for the first time is the administrator. You can have multiple administrator accounts and can always make another type of user an administrator after the fact by checking the box labeled 'Allow user to administer this computer' on a user's profile. Screenshot by Matt Elliott/CNET Standard: can install apps and change settings for his or her own use.

Standard users can't add other users or change other users' settings. Managed with Parental Controls: can access only the apps and content specified by the administrator managing the user. The administrator can restrict the user's contacts and website access, and place time limits on computer use. Sharing Only: can access shared files remotely, but can't log in to or change settings on the computer. Screenshot by Matt Elliott/CNET There is also a Guest User account that is normally enabled by default. A guest can log in without a password but can't change any settings and any files created are deleted when the guest logs out. You can also enable or disable guest access to your shared folders.

You'll likely use the Standard account for the other responsible adults in your household and use the Managed account for your kids. For each user, you can give it a name, a profile pic, and either a separate password or your iCloud password. You can also set up a group and add a subset of your users to it, but it is really only useful if you closely manage your shared folders. (A group can save you a couple of clicks when setting up access rights to shared folders.) Parental controls For Managed users, the parental controls let you restrict access to a variety of content, including certain apps and Websites, and you can also set time limits. On the Apps tab, you can enable Simple Finder, which lets you limit the items in the Dock to a three folders: My Applications, Documents, and Shared. You can then check off which items you'd like to appear in each. Also on the App tab, you can check a box for Limit Applications, which lets you to set an age rating for apps the user can install (up to 9+ or 12+, for example).

Screenshot by Matt Elliott/CNET On the Web tab, you can whitelist and blacklist Websites. The automatic setting is enabled by default, and you can customize it by adding sites but it seems like an uphill climb to add individual sites that you kids can and cannot access. There is also a whitelist setting where you can limit access to only Websites you have approved. On the People tab, you can set up GameCenter restrictions. You can also limit whom you child can contact with the Mail and Messages apps. On the Time Limits tab, you can set a limit on the number of hours your child can use your Mac on weekdays and weekends. Likewise, you can set a bedtime range during which your Mac is inaccessible.

Screenshot by Matt Elliott/CNET Lastly, the Other tab features a number of checkboxes for such things as disabling the Webcam, restricting access to printer settings,and hiding profanity in the Dictionary app and Switching between users You don't need to log out from one account in order to log into another; multiple users can be logged in at the same time. To change from one account to another, click on your user name in the menu bar and select another user from the drop-down menu.