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MARKET CENTRE Cash in your surplus gear. Advertise it here in SILICON CHIP Where do you get those HARD-TO-GET PARTS? Where possible, the SILICON CHIP On-Line Shop stocks hard-to-get project parts, along with PCBs, programmed micros, panels and all the other bits and pieces to enable you to complete your SILICON CHIP project. SILICON CHIP On-Line SHOP www.siliconchip.com.au/shop FOR SALE KIT ASSEMBLY & REPAIR tronixlabs.com.au – Australia's best value for supported hobbyist electronics from Adafruit, SparkFun, Arduino, Freetronics, Raspberry Pi – along with kits, components and much more - with same-day shipping. DAVE THOMPSON (the Serviceman from SILICON CHIP) is available to help you with kit assembly, project troubleshooting, general electronics and custom design work. No job too small. Based in Christchurch, NZ but service available Australia/NZ wide. Email dave<at>davethompson.co.nz PCBs MADE, ONE OR MANY. Any format, hobbyists welcome. Sesame Electronics Phone 0434 781 191. nev-sesame<at>outlook.com www.sesame.com.au LEDs, BRAND NAME and generic LEDs. Heatsinks, fans, LED drivers, power supplies, LED ribbon, kits, components, hardware, EL wire. www.ledsales.com.au PCB MANUFACTURE: single to multi­ layer. Bare board tested. One-offs to any quantity. 48 hour service. Artwork design. Excellent prices. Check out our specials: www.ldelectronics.com.au VINTAGE RADIO REPAIRS: electrical mechanical fitter with 36 years ex­ perience and extensive knowledge of valve and transistor radios. Professional and reliable repairs. All workmanship guaranteed. $17 inspection fee plus charges for parts and labour as required. Labour fees $38 p/h. Pensioner discounts available on application. Contact Alan on 0425 122 415 or email bigalradioshack<at>gmail.com KEITH RIPPON KIT ASSEMBLY & REPAIR: * Australia & New Zealand; * Small production runs. Phone Keith 0409 662 794. keith.rippon<at>gmail.com ADVERTISING IN MARKET CENTRE Classified Ad Rates: $32.00 for up to 20 words (punctuation not charged) plus $1.20 for each additional word. Display ads in Market Centre (minimum 2cm deep, maximum 10cm deep): $82.50 per column centimetre per insertion. All prices include GST. Closing date: 5 weeks prior to month of sale. To book, email the text to silicon<at>siliconchip.com.au and include your name, address & credit card details, or phone Glyn (02) 9939 3295 or 0431 792 293. 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. siliconchip.com.au Celebrating 30 Years March 2018  103 Coming up in Silicon Chip Rohde & Schwarz RTM3004 oscilloscope review Advertising Index We take an in-depth look at one of Rohde & Schwarz's newest scopes, the RTM3004, with 1GHz bandwidth, 5GHz sampling, 10-bit vertical resolution, 16 digital channels and an 80Msample memory. Altronics.................................. 76-79 Facett Hearing Aids from Blamey Saunders Electrolube................................... 11 Ross Tester reports on his experiences with the latest set of hearing aids from leading Australian supplier Blamey Saunders hears. Hare & Forbes............................. 2-3 Introduction to programming the Cyprus CY8CKIT Keith Rippon Kit Assembly......... 103 This low-cost module incorporates a 32-bit microcontroller and a set of reprogrammable analog circuitry which can be used for a wide range of tasks. We show you how to use the free Integrated Development Environment. Dave Thompson......................... 103 Digi-Key Electronics....................... 5 Jaycar............................... IFC,49-56 LD Electronics............................ 103 LEACH Co Ltd................................ 9 LEDsales.................................... 103 Radiant Heater Controller It will be winter in just a few months. Staying comfortable at night can be a challenge. This new Heater Controller design takes care of that, adjusting the heating power while you are sleeping to provide gentle heat without any clicking thermostats or blinking lights which may wake you up. El Cheapo Modules – RF attenuators Jim Rowe describes a programmable, 63-step, 4GHz RF digital step attenuator module with a range of applications. Plus he also looks at a fixed four-range DC-4GHz attenuator Microchip Technology...........OBC,21 Ocean Controls............................ 13 Pakronics..................................... 11 PCBcart...................................... 33 Sesame Electronics................... 103 SC Online Shop...................... 96-97 SC Radio, TV & Hobbies DVD.... 101 Note: these features are planned or are in preparation and should appear within the next few issues of Silicon Chip. The Loudspeaker Kit.com............ 75 The April 2018 issue is due on sale in newsagents by Thursday, March 29th. Expect postal delivery of subscription copies in Australia between March 29th and April 13th. Vintage Radio Repairs............... 103 Tronixlabs................................... 103 Wagner Electronics........................ 7 Notes & Errata Lath-e-Boy High-power Lathe Controller, January 2018: the wiring colours shown in the photos on pages 40, 41 and 43 and in the lower-right corner of the circuit diagram on page 39 are not safe. The four wires to the induction motor should be colour coded red, white, dark blue (from pin 2 of CON7 to the motor) and brown. Green/yellow striped wire must be used for earthing the motor frame (and only for earth!). Touchscreen Altimeter and Weather Station, December 2017: there are some inconsistencies and ambiguities between the circuit diagram (Fig.1), sensor wiring (Fig.3) and parts list, regarding the temperature and humidity sensor. The circuit diagram on page 25 showed a bare DHT22/AM2302 sensor with correctly wired pins, however, pin 4 was shown on the left side of the device and pin 1 on the right, the opposite of how they are numbered on the physical module. Also, the module shown in Fig.3 and the accompanying photo is mounted on a small breakout board with two extra components which were not shown on Fig.1 and not mentioned in the text or parts list. The sensor we supply does not come with the breakout board. The circuit diagram in the online edition has been corrected to show the two extra components. If the sensor you’ve purchased does not come on a breakout board, simply solder a 100nF capacitor between pins 1 and 4 of the DHT22/AM2302 and a 1kW resistor between pins 1 and 2. Note that the 1kW resistor could just as easily be fitted between the +5V and pin 21 (DATA) connections on the BackPack module. High-Power DC Fan Speed Controller, January 2018: the IPP80N06S2L-07 Mosfet is listed in the parts list as being in a TO-92 package but it is actually in a TO-220 package. Arduino Mega Box Music Player, February 2018: the Arduino Uno and Mega do not share the same SPI pin connections. Pins 50, 51 & 52 must be connected by flying leads to digital pins 12, 11 & 13 respectively before the SD card will work on the Mega. SC200 Audio Amplifier, January-March 2017: the power supply is mistakenly listed as 45-0-45V to provide ±57V on page 32 of the January issue and page 85 of the February issue. The transformer is actually 40-0-40V as described in the parts list and circuit diagram in the March issue where the power supply is described in full. 104 Silicon Chip Celebrating 30 Years siliconchip.com.au