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Next Month in Silicon Chip Advertising Index Getting Started with the Micromite, Part Two Allan Warren Electronics............ 103 Geoff Graham's programming tutorial continues. In this issue, we'll show you how to use graphics commands to draw full colour images on the LCD BackPack's touchscreen. You'll also learn some new and very useful BASIC commands. Altronics.................................. 74-77 How to use LTspice to simulate circuits Digi-Key Electronics....................... 3 SPICE is a powerful tool which allows you to use a computer to simulate how a simple or complex circuit will behave without actually having to build it. This makes it much easier to experiment with different configurations and examine the internal operation of the circuit before building it, saving you a lot of time and effort. It can also be used to analyse and understand how a given circuit operates. This is the first in a series of easy-to-follow, step-by-step tutorials on using the free LTspice Windows circuit simulation software from Linear Technology. Aussie Rechargeable Irons............ 9 Digilent Inc................................... 11 Emona Instruments.................... IBC Hare & Forbes.......................... OBC High Profile Communications..... 103 Adding Tyre Pressure Monitors to your vehicle Icom............................................. 13 Your tyres are the interface between your vehicle and the road and proper inflation is vital for correct handling and a long service life. If you get a nail or screw in your tire, how soon will you notice the deflation? By the time it's obvious, it may already be too late. We review two affordable wireless tyre pressure monitoring systems which can give you peace of mind. Jaycar .............................. IFC,49-56 Pool Lap Counter LEDsales.................................... 103 This revised Pool Lap Counter design is easy to build, has a large, bright lap display, is battery powered and uses a pressure sensor to make for a convenient, waterproof unit. If you're at all serious about swimming and don't already have a lap counter, you will want to build this one. Master Instruments........................ 9 Automotive Electronic Fuse Keith Rippon Kit Assembly ...... ..103 LD Electronics............................ 103 Microchip Technology................... 19 Mouser Electronics......................... 5 Sick of having to replace blown fuses? This electronic fuse works the same was as a standard fuse except that it's based on one or two ICs and can be reset by simply pressing a button. You can change its trip current easily by subsituting a different low-power resistor. It gives your circuit the protection of a fuse without the hassle. Ocean Controls............................ 12 Note: these features are prepared or are in preparation for publication and barring unforeseen circumstances, will be in the March issue. Sesame Electronics................... 103 The March 2017 issue is due on sale in newsagents by Thursday February 23rd. Expect postal delivery of subscription copies in Australia between February 23rd and March 7th. SC Radio & Hobbies DVD.......... 101 Notes & Errata High Power DC Motor Speed Control, January-February 2017: the top of trimpots VR1, VR2 and VR7 should connect to 5V, not Vbat. The top of R1 should go to theSC switched side of S1, ie, the anode of D3. The connections on the PCB are correct. Also in the parts list, the Altronics S6040 blade fuse holder is rated at 30A, not 40A. Pakronics....................................... 6 Phillips Monitors............................. 7 SC Online Shop................. 27,96-97 Silicon Chip PCBs........................ 10 Silicon Chip Subscriptions........... 45 Silicon Chip Wallchart.................. 57 Silvertone Electronics.................. 10 Tronixlabs................................ 8,103 WARNING! SILICON CHIP magazine regularly describes projects which employ a mains power supply or produce high voltage. All such projects should be considered dangerous or even lethal if not used safely. Readers are warned that high voltage wiring should be carried out according to the instructions in the articles. When working on these projects use extreme care to ensure that you do not accidentally come into contact with mains AC voltages or high voltage DC. If you are not confident about working with projects employing mains voltages or other high voltages, you are advised not to attempt work on them. Silicon Chip Publications Pty Ltd disclaims any liability for damages should anyone be killed or injured while working on a project or circuit described in any issue of SILICON CHIP magazine. Devices or circuits described in SILICON CHIP may be covered by patents. SILICON CHIP disclaims any liability for the infringement of such patents by the manufacturing or selling of any such equipment. SILICON CHIP also disclaims any liability for projects which are used in such a way as to infringe relevant government regulations and by-laws. Advertisers are warned that they are responsible for the content of all advertisements and that they must conform to the Competition & Consumer Act 2010 or as subsequently amended and to any governmental regulations which are applicable. 104  Silicon Chip siliconchip.com.au