A selection of propellers that fit tightly on small electric motors with 2mm shafts. They range in diameter from approximately 50mm to 140mm.
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· A long-life LED based lamp · Four red LEDs flash with a low on-time to off-time ratio that extends the battery life · This technique is commonly used in bicycle lights · Requires a 9V PP3 battery (Order Code: L46AL)
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· Create interesting effects · Use this UV flash kit to energise glow-in-the-dark material (sample included), by casting shadows etc · Requires 9V PP3 battery (Order Code: L46AL)
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· Never let your plants go thirsty again! · Uses micro-power technology to provide constant monitoring of soil moisture · If the resistance of the soil (dependent on its moisture content) drops below a pre-set level, an LED flashes to indicate the plant needs watering...
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· Countdown from any number of seconds up to 99 · Easy to see 62mm-high digits, each made up from 21 LEDs · Adjustable start time · Ideal for timed games etc · Requires a 9V-18V power supply
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· A matrix of 35 LEDs (7 x 5) displays the current time, scrolling from right to left · Requires a 9V-18V power supply
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· Works like a normal digital alarm clock · Built-in buzzer · Requires a 9V-18V power supply
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· The classic game recreated in electronic form by using bi-colour LEDs (red/green) · Can you outwit the microchip? · Requires 3xAA batteries (Order Code: L43AL)
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· Protect your car with this simple to build project · The circuit flashes an LED using very low average power · Will run off 5V-18V
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· On-board motion sensor latches a relay if even a slight motion is sensed · Reset button returns the relay to an unenergised state · Single pole changeover relay rated at 24V 10A (not suitable for direct switching of mains voltages) · Requires a 12V power supply
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