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Advertising Index AEE Electronex.............................. 5 Altronics.................................85-88 Control Devices........................... 13 Dave Thompson........................ 119 Digi-Key Electronics...................... 3 Emona Instruments.................. IBC Hare & Forbes MachineryHouse......................... 11 Jaycar.............................. IFC,57-64 Keith Rippon Kit Assembly....... 119 LD Electronics........................... 119 LEDsales................................... 119 Lintek PCBs................................. 69 Microchip Technology......... OBC, 7 Mouser Electronics....................... 9 Ocean Controls........................... 10 Phipps Electronics...................... 68 PMD Way................................... 119 ROLEC OKW................................ 71 SC Vintage Radio Collection...... 49 SC SMD Test Tweezers.............. 77 Silicon Chip Binders.................. 81 Silicon Chip Subscriptions........ 37 Silicon Chip Shop.................98-99 Silvertone...................................... 8 The Loudspeaker Kit.com............ 6 Tronixlabs.................................. 119 Wagner Electronics..................... 95 for that project, but we have the PCB and programmed micro at: siliconchip. com.au/Shop/?article=537 You might be interested in the Super Digital Sound Effects Module (August & September 2018; siliconchip.com. au/Series/325). We sell a complete kit for that project, Cat SC4658, for $40 (siliconchip.com.au/Shop/20/4658). It runs from a 2-18V DC supply and drives an 8W speaker. The speaker size is not relevant (except in terms of fitting it in your boat), but you should look for a speaker with a high efficiency figure and good low-frequency extension to maximise the volume and realism of the sound. We also published a relevant project in October 1991, the SteamSound Simulator Mk.II (siliconchip.com.au/ Article/5853), which produces steam train engine simulation. But there is no PCB available, just the PDF pattern. Note that you can find all projects and kits (including any kits produced by Jaycar & Altronics) using the search page at siliconchip.com.au/Articles/ ContentsSearch For example, try typing “steam” or “sound effects” into the Name box and click the Search button. Remote control codes for older projects I built the Remote Volume Control for Stereo Amplifiers from June 2002 (siliconchip.com.au/Article/4062) from an Altronics kit (K5026). I also bought the latest version of the programmable remote control, the Dynalink A1012A. Unfortunately, I have not been able to get this combination to work. I checked the supply voltage and the voltage on the programmable chip socket before inserting the chip, and it all checked out OK. I have double-­ checked the components on the board to ensure the assembly was correct and checked the resistor values before soldering them. The BC338s are in the correct positions. The remote control is a newer version of the A1012 but the programming is straightforward. I have tried manual input of control codes as well as automatic searching for control codes without success. The A1012A unit requires a four-digit input code, and I tried about half of the numbers listed in the Philips TV section. Can you suggest how I can troubleshoot this project? (R. B., via email) ● Unfortunately, the A1012A is not directly compatible with the A1012. Our June 2002 project was published before either of those devices were sold, so the article doesn’t mention them. The codes used in the June 2002 design may be the same as our Remote Controlled Stereo Preamp from March & April 2019 (we tend to reuse the same codes). In that case, for the A1012A, one of the following TV codes should work: 0088, 0149 or 0169. If it still doesn’t work, you could have a problem with the infrared receiver or microcontroller. You will need to check to see if there are pulses at the microcontroller’s IR input pin when you aim the remote at the receiver and press a button. The rest of the time, it should idle high (near the receiver’s supply voltage). It would also be a good idea to try installing LK1 and/or LK2. Those change the codes the unit is expecting, and one set of codes might align with what the remote control is producing. SC Notes & Errata Dual Hybrid Power Supply, February 2022: in Fig.7 on p29, the pinout diagram for the LM1084 is incorrectly labelled LM1048. Also, on page 31, a little more than halfway down the text, it refers to the pre-regulator as REG4 when it is actually REG5. The Mysterious Mickey Oz, Vintage Radio, January 2022: the best sensitivity (without the problematic IF filter) was 7μV for 50mW output at 600kHz. However, the text states 70μV. 7μV is the correct value. Remote Control Range Extender, January 2022: the ground for the Micro USB B connector is connected to the 4th pin instead of the 5th pin on the RevB PCB. To fix this, a solder or wire bridge connection needs to be made between the 4th and the 5th pins of CON2. The RevC PCB will have this corrected. Solid-State Tesla Coil, February 2022: in the circuit diagram, Fig.1, F1 and PTC1 were shown wired in series in the opposite order to how they are wired on the PCB. This does not have any effect on the circuit’s behaviour. The May 2022 issue is due on sale in newsagents by Thursday 28th of April. Expect postal delivery of subscription copies in Australia between April 27th and May 13th. 120 Silicon Chip Australia's electronics magazine siliconchip.com.au