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Notes & Errata 4-Input Automotive Fault Detector, September 2016: the 3-way screw terminal blocks that make up CON1 have 5mm pin spacing, not 6mm as stated in the parts list. Circuit Notebook, dsPIC/PIC programmer improvements, September 2016: The modification made to the circuit does not fully protect Q1 from excessive negative input signals. The circuit has been changed to include a 1N4148 diode (D2) in inverse parallel between the junction of Q1’s base and the 1.5kΩ resistor. Vintage Radio, September 2016: In Fig.3 bypass capacitor #22 was incorrectly labelled in the diagram as #23, and a 22Ω resistor (#48) was omitted between the junction of resistors #51 and #52. Appliance Energy Meter, AugustOctober 2016: it has been brought to our attention that the ACS712 isolated current monitor IC does not have a sufficiently high “Reinforced Isolation Voltage” rating to meet Australian/New Zealand safety standards for double-insulated equipment (AS/NZS 60950.1.2011), which this device effectively is. Advertising Index The solution is to replace it with an ACS718KMATR-20B-T IC which has a different package and pinout but provides the same function. All constructors who have already received PCBs for this project will be sent an adaptor board, ACS718 IC and instructions describing how to fit the substitute device. Others who have ordered the PCB will either receive the original PCB plus the adaptor and IC or, eventually, a revised PCB with a footprint to suit the ACS718. Aerospace & Defence Products..... 8 Compact 8-Digit Auto-Ranging Frequency Meter, August 2016: the firmware (0410516A.HEX) fails to initialise certain types of LCDs. The revised version, 0410516B.HEX, solves this. It can be download from the Silicon Chip website. Jaycar .............................. IFC,49-56 5-Element DAB+ Antenna, November 2015: the dimensions/drilling details shown in Fig.1 for the lower dipole elements have been slightly modified. The revised diagram is shown in the article on the Silicon Chip website. In addition, the 1.25-metre x 19mm square tubing for the boom should have a specified wall thickness of 1.2mm (not 1.8mm as shown in the parts list). Microchip Technology................ 9,63 Allan Warren Electronics............ 103 Altronics.........................loose insert Digi-Key Electronics....................... 3 Emona Instruments.................... IBC Front Panel Express..................... 10 Glyn Ltd NZ.................................. 14 Hammond Manufacturing............. 41 Hare & Forbes............................. 4-5 KCS Trade Pty Ltd.................... OBC Keith Rippon Kit Assembly ........ 103 LD Electronics............................ 103 LEDsales.................................... 103 Mouser Electronics......................... 7 Ocean Controls............................ 12 PCB Cart...................................... 13 Rohde & Schwarz........................ 11 Sesame Electronics................... 103 SC Radio & Hobbies DVD............ 97 SC Online Shop................. 80-81,87 Ask SILICON CHIP . . . continued from page 103 that is supplied with the Jaycar kit for the Ultrasonic antifouling for boats (kit KC5498). The transformer and windings are the same for these two projects. Contact kits<at>jaycar.com. au regarding obtaining the prewound transformer. SC Next Issue The December 2016 issue is due on sale in newsagents by Thursday 24th November. Expect postal delivery of subscription copies in Australia between the 24th of November and the 9th of December. Silicon Chip Binders................... 103 Silicon Chip Subscriptions........... 93 Silicon Chip Wallchart................ 101 Silvertone Electronics.................. 10 Trio Test & Measurement.............. 15 Tronixlabs................................... 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