Coming up in Silicon Chip
Advertising Index
Arduino Vidor 4000 review
Altronics...............................76-79
This compact new Arduino board has a number of unique features such as
an onboard field-programmable gate array (FPGA), WiFi, Bluetooth and an
HDMI video output.
Cypher Research Labs............. 13
Diode Curve Plotter
With this project, we’ve taken a zener diode tester to the next level. It actually
plots the device’s I/V curve on an LCD screen and is suitable for use with zener diodes, TVSs, LEDs and standard diodes, among other devices.
Dave Thompson...................... 111
Digi-Key Electronics.................... 3
Emona..................................... IBC
Hare & Forbes....................... OBC
Jaycar............................ IFC,53-60
Keith Rippon Kit Assembly...... 111
High-current linear bench supply
This power supply has very low ripple and noise due to the use of linear regulation. But it can still deliver plenty of current (more than 5A) with an output
of up to 50V.
LD Electronics......................... 111
LEACH Co Ltd........................... 93
LEDsales................................. 111
Low Energy Developments...... 111
Smartphone medicine, part two
In this follow-up article, Dr David Maddison describes many new medical applications for smartphones which involve interfacing the phone to external
hardware. This includes detecting cancer with an “artificial nose”, doing DNA
analysis in the field, detecting and classifying viruses, blood pressure and cardiac monitoring, and picking up food-based allergens, plus some other great
examples of modern medical technology.
Microchip Technology.................. 5
Trailing Edge touch and remote controlled Dimmer, part two
Silicon Chip Shop...........102-103
Mouser Electronics...................... 9
Ocean Controls......................... 10
SC Micromite BackPack.......... 107
Silicon Chip Back Issues.......... 41
This follow-up article has all the Touch & IR Remote Control Dimmer construction details, plus testing and installation instructions.
Silicon Chip Subscriptions..... 109
Note: these features are planned or are in preparation and should appear
within the next few issues of Silicon Chip.
Tronixlabs................................ 111
The March 2019 issue is due on sale in newsagents by Thursday, February
28th. Expect postal delivery of subscription copies in Australia between February 26th and March 13th.
Wagner Electronics..................... 6
The Loudspeaker Kit.com......... 11
Vintage Radio Repairs............ 111
Weller Soldering Iron................... 7
Notes & Errata
Isolated Serial Link, January 2019: if using the device for isolating circuitry floating at mains potential, the following precautions must be observed:
1) It must be mounted in an Earthed metal or double-insulated case before connecting it to the mains-powered equipment (ideally, within the same enclosure). Only the isolated connections should be brought outside the case. If mounting in a separate
case, the wiring to the mains-powered equipment must be mains-rated and properly insulated at both ends.
2) Either omit the isolated power supply circuitry or build the version using MOD1, not transformer T1.
3) If using MOD1, lengthen the slot underneath it until it nearly touches OPTO1 (the slot is already lengthened on RevH boards)
800W(+) UPS, May-July 2018: the Altronics chassis-mount LEDs mention in the parts list on page 33 of the May 2018 issue
(Cat Z0222, Z0224 & Z0226) do not have integral current-limiting resistors. You will either need to solder a resistor of around
1kW in series with each LED or use chassis-mount LEDs which already have resistors, such as Jaycar Cat SL2644/SL2645
or Altronics Cat Z0264/Z0265.
Full Wave, 230V Universal Motor Speed Controller, March 2018: in the circuit diagram (Fig.1) on page 36, the “Active In”
wire from FUSE1 is shown connecting to the top-most terminal of CON1 and it then goes through the core of transformer T1.
This is incorrect; the wire from FUSE1 goes directly to T1, then to CON1 and on to the A1 terminal of TRIAC1. The overlay and
wiring diagram (Fig.2) on page 40 is correct.
BackPack Touchscreen DDS Signal Generator, April 2017: the 560W resistor in the parts list should actually be 470W.
SC200 Audio Amplifier Module, January-March 2017: in the alternative SMD parts list on page 81 of the February 2017
issue, Q1 should be listed as a BCM856DS, not a BC856. Q2, Q5 and Q6 are all listed correctly as BC856 types.
12AX7 Valve Audio Preamplifier, November 2003: in the power supply circuit diagram (Fig.8) on page 30, VR1 and its series
220kW resistor are shown swapped compared to the PCB layout. VR1’s wiper and the top end of the track connect to the junction
of the 47kW and 680kW 1W resistors.
112
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