Fullscreen HTML5Med Res (??MB)HTML4

‘tens’ flashes and four ‘units’ flashes). Each flash takes 0.7 seconds (0.5 off and 0.2 on), giving a total of 4.2 seconds. Add to that the one-second delay between the ‘tens’ finishing flashing and the ‘units’ starting, and we have 5.2 seconds for the sequence. Since the clock resets at (in this example) six seconds, we have a 0.8 second delay at the end of the cycle before it starts again. Taking this approach means the cycle time adapts to the required number of flashes. As with all XOD sketches, this one is easily customised. For example, if you wanted the cycle time to be longer, you could put another ‘add’ node in above the ‘clock’ and add a further (say) five seconds to the cycle time. Note that as configured, the thermometer cannot show negative temperatures, nor degrees Fahrenheit. (Both of these are quite possible, though. For example, XOD even has available a direct units conversion node for Celsius/ Fahrenheit – you might want to try adding it to the sketch.) Spacers are used to hold the two parts of the enclosure 20mm apart. This gives enough room for the wiring of the temperature sensor and two LEDs to be placed within the enclosure. by the contents of the yellow box – that registers when the ‘tens’ have finished, adds a delay of one second, and then starts the ‘units’ flashing. The brown box comprises the logic for the ‘tens’ flasher; it uses the same approach as for the ‘units’. The blue box starts the cycle. It does this by adding the ‘tens’ and ‘units’ numbers together to gain the total required number of flashes. In this example that is six (two Conclusion I find the Light Column Thermometer fascinating to watch. It can be seen from across the other side of the room, and reading it is oddly relaxing – perhaps because you have to pause and watch, rather than just glance and run. It’s also an ideal project with which to discover the fascinating world of XOD. XOD files The XOD file discussed in this article can be downloaded from the January 2021 page of the PE website. See PE March 2020 for an introduction to using XOD. Teach-In 8 CD-ROM Exploring the Arduino EE FR -ROM CD ELECTRONICS TEACH-IN 8 FREE CD-ROM The Arduino offers a remarkably effective platform for developing a huge variety of projects; from operating a set of Christmas tree lights to remotely controlling a robotic vehicle wirelessly or via the Internet. Teach-In 8 is based around a series of practical projects with plenty of information for customisation. The projects can be combined together in many different ways in order to build more complex systems that can be used to solve a wide variety of home automation and environmental monitoring problems. The series includes topics such as RF technology, wireless networking and remote web access. The CD-ROM also includes a bonus – an extra 12-part series based around the popular PIC microcontroller, explaining how to build PIC-based systems. SOFTWARE FOR THE TEACH-IN 8 SERIES FROM THE PUBLISHERS OF This CD-ROM version of the exciting and popular Teach-In 8 series has been designed for electronics enthusiasts who want to get to grips with the inexpensive, immensely popular Arduino microcontroller, as well as coding enthusiasts who want to explore hardware and interfacing. Teach-In 8 provides a one-stop source of ideas and practical information. PLUS: PICs and the PICkit 3 – A beginners guide £8.99 INTRODUCING THE ARDUINO • Hardware – learn about components and circuits • Programming – powerful integrated development system • Microcontrollers – understand control operations • Communications – connect to PCs and other Arduinos PLUS... PIC n’MIX PICs and the PICkit 3 - A beginners guide. The why and how to build PIC-based projects Teach In 8 Cover.indd 1 04/04/2017 12:24 PRICE £8.99 Includes P&P to UK if ordered direct from us SOFTWARE The CD-ROM contains the software for both the Teach-In 8 and PICkit 3 series. ORDER YOUR COPY TODAY! JUST CALL 01202 880299 OR VISIT www.electronpublishing.com 66 Practical Electronics | January | 2021 CLASSIFIED ADVERTISING Practical Electronics If you want your advertisements to be seen by the largest readership at the most economical price then our classified page offers excellent value. The rate for semi-display space is £10 (+VAT) per centimetre high, with a minimum height of 2·5cm. All semi-display adverts have a width of 5.5cm. The prepaid rate for classified adverts is 40p (+VAT) per word (minimum 12 words). Cheques are made payable to ‘Practical Electronics’. VAT must be added. Advertisements with remittance should be sent to: Practical Electronics, 113 Lynwood Drive, Wimborne, Dorset, BH21 1UU. Tel 07973518682 Email: pe<at>electronpublishing.com BOWOOD ELECTRONICS LTD For ratesofand further information on display and classified advertising Suppliers Electronic Components please contact our Advertisement Manager, Matt Pulzer – see below. www.bowood-electronics.co.uk Unit 10, Boythorpe Business Park, Dock Walk, Chesterfield, Derbyshire S40 2QR. Sales: 01246 200 222 Practical Electronics reaches more UK readers than any other UK monthly hobby electronics magazine. Our sales figures prove it. We have been the leading monthly magazine in this market for the last twenty-seven years. Send large letter stamp for Catalogue BOWOOD ELECTRONICS LTD Suppliers of Electronic Components www.bowood-electronics.co.uk Unit 10, Boythorpe Business Park, Dock Walk, Chesterfield, Derbyshire S40 2QR. Sales: 01246 200 222 Send large letter stamp for Catalogue MISCELLANEOUS VALVES AND ALLIED COMPONENTS IN STOCK. Phone for free list. Valves, books and magazines wanted. Geoff Davies (Radio), tel. 01788 574774. Electrical Industries Charity (EIC) We help people working in the electrical, electronics and energy community as well as their family members and retirees. We use workplace programmes that give the industry access to financial grants and a comprehensive range of free and confidential services www.electricalcharity.org COAST ELECTRONICS BREAKOUTS-COMPONENTSCONTRACT DESIGN-3D PRINTER PARTSMUSICAL-MICROCONTROLLERS WWW.COASTELECTRONICS.CO.UK Andrew Kenny – Qualified Patent Agent EPO UKIPO USPTO Circuits Electric Machinery Mechatronics Web: www.akennypatentm.com Email: Enquiries<at>akennypatentm.com Tel: 0789 606 9725 PIC DEVELOPMENT KITS, DTMF kits and modules, CTCSS Encoder and Decoder/Display kits. Visit www.cstech.co.uk ADVERTISING INDEX CRICKLEWOOD ELECTRONICS . . . . . . . . . . . . . . . . . . . . . . . . . 57 ESR ELECTRONIC COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . 57 HAMMOND ELECTRONICS Ltd . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 JPG ELECTRONICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 MICROCHIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cover (ii) PEAK ELECTRONIC DESIGN. . . . . . . . . . . . . . . . . . . . . . Cover (iv) POLABS D.O.O.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 QUASAR ELECTRONICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SILICON CHIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 STEWART OF READING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TAG-CONNECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Advertisement offices Matt Pulzer Electron Publishing Ltd 1 Buckingham Road Brighton East Sussex BN1 3RA Tel 07973 518682 Email pe<at>electronpublishing.com Web www.electronpublishing.com For editorial contact details see page 7. Practical Electronics | January | 2021 67