| AUDIO INPUT SELECTOR BOX |
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An audio selector that has an audio pre-amplifier built in and selection of up to four source inputs with LED indication. |
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| BABY MONITOR |
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This uses a cheap AM transmitter and receiver to send a signal from the source (Eeyore ornament) to a reciever in the black case. The level of noise is displayed on an LED scale. This won a Rotary Club prize fro the student. |
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| BAG ALARM |
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A simple timed alarm based on a 555 monostable and activated by a vibration switch. The siren used is very loud indeed reaching 110dB with a 9v battery!! |
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| BICYCLE SPEEDO |
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A speedometer that can measure up to 11 or 22m/s (45mph) on an LED display. Uses spoke magnets and a reed switch. Requires a PIC micro-controller. |
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| BINGO RANDOM NUMBER GENERATOR |
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This produces a random number from 1 to 49 and displays it on a large 7 segment display. A simple fast counter with logic to star counting from 1 instead of 0. |
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| BOAT LIGHT |
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A 12 volt LED light that tirggers automatically from a PIR detector and then uses a monostable to stay on for a fixed amount of time. |
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| CAMERA TRIGGER WITH PIR |
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This uses a PIR detector to activate a solenoid which presses the button on a disposable camera. |
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| COOKING TIMER |
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Simple monstables to provide timing up to 30 minutes with an audible buzzer output. The last one activates a speech recorder unit which plays a short message and the LEDs go out when the time is up. |
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| DIGITAL DICE |
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A 2 digit electronic dice with sound. Shake the die to roll some numbers from 1 to 6.
Note: Requires a ptogrammed PIC - available from our shop. |
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| ELECTRONIC DICE |
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This version is much simpler and uses a counter and logic to produce a random value from 1 to 6 in the traditional patterns. |
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| FRIDGE ALERT |
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A light operated circuit that sounds an alarm for an adjustable period of time when the fridge door is opened. Ensures the door stays closed and also good for food junkies!! |
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| GOLF SCORECARD |
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Keep track of your score digitally with this pocket sized scorecard. It uses the same circuit as the snooker scoreboard. |
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| GUITAR AMPLIFIER - POCKET SIZE |
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These are guitar amplifiers design for headphones and to be easily portable. They feature a 800mW amplifier and run from 4 AA batteries. |
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| GUITAR AMPLIFIER |
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These guitar amplifiers have a higher output to drive speakers. They are around 3W and need substantial batteries or power supplies. |
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| GUITAR FUZZ BOX |
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A "Fuzz" effects circuit that distorts guitar sound to produce the classic sound for electric guitars. Run from a 9v battery and has controls for fuzz and depth. |
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| GUITAR TUNER |
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A guitar tuner with 3 LED display to indicate Flat - OK - Sharp. Tunes to middle A - 440Hz.
Note: Requires a PIC programmer. (Pre-programmed PIC available) |
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| INTERCOM |
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An intercom between a kitchen and lounge, with call facility, in the shape of a burger! The other end is also the shape of a bun. |
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| KITCHEN TIMER |
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Provides timing from 5-55 minutes in 5 minute intervals. A dual 7-segment display indicates time left.
Note: Requires a PIC programmer. (Pre-programmed PIC available) |
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| MEDICAL AID |
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A simple device to count the number of times medication has been taken in a day. Press the button to activate display. Counter resets automatically after 24 hours.
Note: Requires a PIC programmer. (Pre-programmed PIC available) |
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| METRONOME |
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A basic metronome with adjustable tempo from around 50 beats to 240 beats per minute. The pitch and duration of the tone can be adjusted to produce a variety of sounds. from clicks to hollow wooden block effect. |
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| METRONOME ADVANCED |
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This metronome includes selection of 2,4,6,8 and10 beats to the bar. An audible emphasis and LED indicate the first beat, and a second LED for the rest. Tempo and pitch also adjustable. |
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| MONEY BOX |
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As the coins enter they trigger a switcfh which plays a tune recorded onto a voice recorder circuit. The case is vacuum formed and has a wooden back and base. |
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| PARKING ASSISTANT |
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A parking aid that relies on a car moving over a pressure pad that displays a warning to the driver. Circuit fetaures automatic power management in that it switches itself on and off when needed. |
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| PC TEMPERATURE MONITOR |
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This uses a remote thermistor to monitor the temperature of a PC and displays it on an LED scale, using the LM2914 IC. When the last LED is lit the alarm sounds. |
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| PEOPLE COUNTER |
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A discrete sentry circuit that will count the number of people walking past but only display it when a button is pressed. Good for guarding bedrooms. It uses a PIR for detection and a single digit display. |
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| PEOPLE COUNTER 2 |
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These are the same as above but have a dual digit display and can count up to 99. All vacuum formed from plasticine moulds. |
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| RACE STARTER |
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This circuit lights up 5 LEDs, one after the other and then switches them all off to signal the start of a race. |
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| REMOTE DINNER BELL |
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This uses a cheap AM transmitter and receiver to transmit a tone from an astable. This is picked up by the reciever and a siren activates. Has a range of about 50m. |
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| ROOM ALARM WITH PIR |
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A wall hung mask that is actually a burglar alarm. The PIR detector activates an monostable and loud siren which switches off after 5 minutes. |
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| ROULETTE WHEEL |
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This roulette wheel has 37 LED's that flash in sequence while the 'spin' button is pressed and slow down gradually to a stop when released. All neatly fitted into a briefcase.
Note: There is some complex wiring to connect up in this project. |
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| ROULETTE - HANDHELD |
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A hand-held version of the above, made in the shape of a games controller (of sorts). It uses 3mm LEDs and a PIC version of the circuit. The size made the wiring of the LEDs very diificult and needed much patience. |
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| SCALECTRIX LAP TIMER |
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A 4digit lap timer counting in 1/100's of a second. Times the duration of alternate laps and auto resets at the start. The sensor is an LDR underneath the gap in the track. |
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| SCOREBOARD - FOOTBALL |
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This football score board uses 2 single digit counters - the same used in the people counter projects but with a switch instead of a PIR. |
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| SCOREBOARD - SNOOKER |
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A snooker scoreboard that has count up/down and reset on a 3 digit display. The project shown uses 2 identical circuits for each player. Note: Requires a PIC programmer. (Pre-programmed PIC available) |
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| SCOREBOARD - TABLE-TENNIS |
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This scoreboard is built on the back of a paddle with a round box extended around it. It uses the snooker circuit but I'm not sure why it need 3 digits. |
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| SIMON SAYS GAME |
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This memory game very similar to others but MUCH BETTER...up to 63 notes steps! All the features of the original 70's toy and more - for those that remember it!!
Note: Requires a ptogrammed PIC - available from our shop. |
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| SOUND EFFECT TOY ARK |
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This MDF ark contains a cirucit which used to be available with lots of farmyard animal noises. There are many voice recorder circuits available instead whcih can have sound effects recorded into. |
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| SOUND METER |
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A very popular project using the LM3916 IC and housed in a variety of enclosures. All work from a microphone and were undoubtedly inspired by the Giant LED meter. |
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| SURVIVAL GAME |
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This is a variation of an old game. Climb the rope while the light is on, if it's off when the button's pressed, you fall to the bottom. Has variable difficulty settings and sound. |
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| ULTRASONIC ALARM |
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A compact little circuit with alarm duration control and sensitivity adjustment. Good for single rooms and small buildings. Requires oscilloscope or voltmeter to set up. |
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| ULTRASONIC CAR ALARM |
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The same circuit used as in the above project, but without the siren attached. These versions activate the lights and horn and are designed to fit in a car interior. |
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| WIND SPEED INDICATOR |
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This is an alternative application for the Bicycle speedo circuit where magnets can be place on the main rotating shaft instead of a bicycle wheel. |
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