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K6007 12V/24V 20A DC Motor Speed Controller Kit

12V/24V 20A DC Motor Speed Controller Kit

K6007

(SC June '11) This gutsy little speed controller has a wide range of applications and is simple to build and use. There are no software settings to fiddle with but it does have some really useful features such as low-battery protection, soft start
K5026 Remote Volume Control Kit

Remote Volume Control Kit

K5026

(SC June '02) Add a remote control volume to your latest audio project or amplifier. Ideal for building into amplifiers or pre-amps. It features PIC controlled precision and a motorised pot so the knob will move whe
K1134 Mosquito Lure Kit

Mosquito Lure Kit

K1134

This cheap and easy to build kit has been designed to help combat zika and other mosquito borne viruses. It lures male mosquitos into a trap by producing an inaudible tone which attracts them. The female mosquito is the culprit for the painful bites which are not only uncomfortable, but spread some very nasty viruses.
K1137 Universal Temperature Alarm Kit

Universal Temperature Alarm Kit

K1137

This compact alarm can be used to monitor the operating temperature of a whole range of devices. You could use it to monitor your tropical fish tank, your home brew, freezer, fridge, your hot water system or where temperature monitoring is useful.
K6047 Mains Timer Kit

Mains Timer Kit

K6047

(SC August 2012). This simple circuit provides a turn-off delay for a 230VAC light or a fan. It can be used to make a bathroom fan run for a set period after the switch has been turned off or it can be used with a pushbutton to turn a light on fo
K5168 Power Supply Board for 135W Ultra LD Amplifier

Power Supply Board for 135W Ultra LD Ampli...

K5168

(SC Nov '11) Power Supply Board for K 5165 135W Ultra Low Distortion Amplifier.
K4344 Quick Brake Automotive Light Kit

Quick Brake Automotive Light Kit

K4344

(SC Jan '16) The quick brake module is designed to detect fast pedal movements between the accelerator and the brake, switching on the brake lights of your car before your foot reaches the brake pedal. This gives other drivers more notice when travelling behind you and reduces the risk of a rear end accident.
K5116 20W Amplifier Module Kit

20W Amplifier Module Kit

K5116

(SC Dec 2004) Extremely simple amplifier kit designed to be easy enough for beginners to assemble. Delivers 20W RMS and is suitable for small hi-fi applications or a PC sound system.
K5522 Balanced to Unbalance Conv. Kit

Balanced to Unbalance Conv. Kit

K5522

(SC June 2008) If you need to send audio over long distances this kit can convert unbalanced line level signals to balanced. Perfect for preventing hum and noise. The kit can also convert balanced signals to unbalanced.
K5193 Case To Suit K5192 Hifi Valve Preamplifier Kit

Case To Suit K5192 Hifi Valve Preamplifier...

K5193

High quality friction fit clear acrylic case designed to fit the K5192 Stereo Hifi Valve Preamplifier kit.
K6042 240V Mains Soft Starter Kit

240V Mains Soft Starter Kit

K6042

(SC April '12) Are you alarmed by the juicy "splatt" from your mains power point when you plug in something like a large plasma TV set? Do you sometimes burn out light and power point switches because of
K2930 Opto-Isolated Mains Relay

Opto-Isolated Mains Relay

K2930

If you need to switch mains voltages, say from a micro's out- put or any other low voltage source, you need to isolate them from each other. That&rsquos what this project does - it's easy to build and keeps mains voltages locked away from the controller and you! Virtually any low voltage source will do - from 2.7 to 10V.
K5167 Stereo Speaker Protector Board for 135W Ultra LD Amplifier

Stereo Speaker Protector Board for 135W Ul...

K5167

(SC Nov '11) Loudspeaker Protector board for K 5165 135W Ultra Low Distortion Amplifier. Protects your speakers and amplifier from short circuits, Over temperature and DC faults that can occur.
K5842 Video / Audio Switcher Kit

Video / Audio Switcher Kit

K5842

(SC June '01) If your home or business has more than one CCTV security camera you will want an automatic scanner that switches between the cameras so you can see what's happening, all on a single monitor.
K5542 Voice Operated Switch Kit

Voice Operated Switch Kit

K5542

(SC July. '11) This versatile VOX circuit is triggered whenever a noise or sound is made causing a relay to close for a preset time. Requires a 12V DC power supply and a microphone. Reaction sensitivity and on tim
K4362 Internal Siren MKII Alarm Kit

Internal Siren MKII Alarm Kit

K4362

(EA Jan '99) A very simple, yet extraordinarily effective deterrent to car thieving persons. Controlled by a hidden switch inside your car, this alarm will sound an ear-piercing 110dB piezo siren inside you
K5531 Balanced Microphone Preamplifier Kit

Balanced Microphone Preamplifier Kit

K5531

(SC April '95) Designed by Altronics. This kit will amplify a microphone (low level signal) to a line level to connect into an amplifier. It features high performance with a balanced mic input as well as
K2001 SMD Soldering Trainer Kit

SMD Soldering Trainer Kit

K2001

This simple SMD Trainer project is a great way to practice soldering a variety of surface-mount devices.
K1109B Kelvin Crazy Cricket Kit

Kelvin Crazy Cricket Kit

K1109B

Kelvin, the electronic cricket, is a bit of a smart alec. Just like a real cricket, he only starts chirping in the dark. And also like a real cricket, the warmer it is, the more rapidly he chirps. So you can actually tell the temperature, based on the sounds he makes!
K6008 12V Motor Speed / Light Dimmer Controller Kit

12V Motor Speed / Light Dimmer Controller Kit

K6008

(SC November '08) This small circuit can be used as a speed controller for a 12V motor rated up to 5A (continuous) or as a dimmer for a 12V halogen or standard incandescent lamp up to 50W. It varies the power to the load (motor or lamp) usi
K6340 Mini Switching Regulator

Mini Switching Regulator

K6340

(SC Feb '12) This tiny regulator board outputs 1.2-20V from a higher voltage DC supply at currents up to 1.5A. It's small, efficient and cheap to build, with many handy features such as a very low drop-ou
K5117 Power Supply Kit To Suit K5116 Amplifier

Power Supply Kit To Suit K5116 Amplifier

K5117

This is the recommended power supply for the K5116 Amplifier Module Kit.
K5544 Mini Vox Relay Kit

Mini Vox Relay Kit

K5544

(SC Sept. '94) Compact miniature design uses only one IC to switch a relay. This versatile Vox circuit is triggered whenever a noise or sound is made (via the microphone) causing a relay to close for a preset time.
K6044 Champion Pre-Amp Kit

Champion Pre-Amp Kit

K6044

(SC January 2013) Designed to complement the K 6066 Champion Amp kit. Utilises a low voltage op-amp IC with considerably better performance than the old 'Pre-Champ'. Provides added gain to your signal whe
K6066 7 Watt Champion Amplifier Kit

7 Watt Champion Amplifier Kit

K6066

(SC January 2013) A fully upgraded and redesigned version of the 'Champ Amp'. Delivers up to 7 watts of peak power with lower noise and distortion levels. It also offers muting and standby control, plus two

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