Nuts and Volts - September 2011

Selling Kits for Electronic Enthusiasts

KIT OF THE MONTH

12/24VDC 20A Motor Speed Controller Kit KC-5502 $29.00 plus postage & packing

Control the speed of 12 or 24VDC motors from zero to full power, up to 20A. Features optional soft start, adjustable pulse frequency to reduce motor noise, and low battery protection. The speed is set using the onboard trimpot, or by using an external potentiometer (available separately, use RP-3510 $2.00).

• Kit supplied with PCB and all onboard electronic components • Suitable enclosure UB3 case, HB-6013 $2.50

Speedo Corrector MkII Kit

KC-5435 $39.75 plus postage & packing

When you modify your gearbox, diff ratio or change to a large circumference tyre, it may result in an inaccurate speedometer. This kit alters the speedometer signal up or down from 0% to 99% of the original signal. With this improved model, the input setup selection can be automatically selected and it also features an LED indicator to show when the input signal is being received. Kit supplied with PCB with overlay and all electronic components.

• PCB: 105 x 61mm • Recommended box UB5 use HB-6013 $2.50

Ultrasonic Antifouling for Boats

KC-5498 $179.50 plus postage & packing
Marine growth electronic antifouling systems can
cost thousands. This project uses the same
ultrasonic waveforms and virtually identical
ultrasonic transducers mounted in sturdy
polyurethane housings. By building yourself (which
includes some potting) you save a fortune!
Standard unit consists of control electronic kit and
case, ultrasonic transducer, potting and gluing
components and housings. The single transducer
design of this kit is suitable for boats up to 10m
(32ft); boats longer than about 14m will need two
transducers and drivers. Basically all parts supplied
in the project kit including wiring.
(Price includes epoxies).

Universal Voltage Switch

KC-5377 $23.75 plus postage & packing
This is a universal module which can be adapted to
suit a range of different applications. It will trip a
relay when a preset voltage is reached. It can be
configured to trip with a rising or falling voltage, so
it is suitable for a wide variety of voltage outputting
devices. For example a car throttle position sensor,
air flow sensor, EGO sensor. You could even use it
to trigger an extra fuel pump under high boost, anti-
lag wastegate shutoff, and much more. Kit supplied
with PCB, and all electronic
components.

• 12VDC • Suitable for power or sail • Could be powered by a solar panel/wind generator • PCB: 78 x 104mm

Hundreds Sold!

SECURITY KITS

UHF Rolling Code Remote Switch Kit KC-5483 $72.00 plus postage & packing High-security 3-channel remote control that can be used for keyless entry into residential or commercial premises or for controlling garage doors and lights. Features rolling code/code hopping, the access codes can't be intercepted and decoded by undesirables. The transmitter kit includes a three button key fob case and runs on a 12V remote control battery. The receiver is a short-form kit without case so you can mount it in the location or enclosure of your choice.

• Receiver 12VDC 150mA (1A for door strike use)

• PCB: Transmitter: 34 x 56mm • Receiver: 110 x 141mm Also available to suit: Additional Transmitter Kit KC-5484 $29.00 Rolling Code Infrared Keyless Entry System KC-5458 $47.00 plus postage & packing This keyless entry system features two independent door strike outputs and will recognise up to 16 separate key fobs. The system keeps the coded key fobs synchronised to the receiver and compensates for random button presses while the fobs are out of range. Supplied with solder masked and silk screen printed PCB, two programmed micros, battery and all electronic components.

Don’t just sit there BUILD SOMETHING!

• Receiver requires a 12VDC 1.5A power supply • Some SMD soldering is required • PCB: 61 x 122mm

• PCB: 105 x 60mm

Universal Power Supply Regulator KC-5501 $11.00 plus postage & packing

This is an upgraded version of the original universal power supply kit published in August 1988. One small board and a handful of parts will allow you to create either a regulated ±15V rail or +15VDC single voltage from a single winding or centre tap transformer (not included). See website for more details.

• Includes all PCB and components for board, transformer not included • PCB: 72(L) x 30(W)mm

"Minivox" Voice Operated Relay

KC-5172 $11.50 plus postage & packing
Voice operated relays are used for 'hands free' radio
communications and some PA applications etc.
Instead of pushing a button, this device is activated
by the sound of a voice. This tiny kit fits in the
tightest spaces and has almost no turn-on delay.
12VDC 35mA required. Kit is supplied with PCB
electret mic, and all specified
components.

• PCB: 47 x 44mm

SHORT CIRCUITS - VOLUME 1

This volume will teach you everything you need to get started in electronics and is suitable for ages 8+. We give you the option of buying the book on its own, or together with the accompanying kit that contains the components for each of the 20-odd projects described in the book. Some of the exciting projects include a Police Siren, Electronic Organ, Sound Effects Unit, Light Chaser and many, many more! The full colour 96 page book, is lavishly illustrated with over 100 drawings and diagrams. No prior knowledge of electronics is needed, projects are fun and totally safe to build.