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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