Archive for August 2013

Hand Dryer PCB

This controller capacitively senses the proximity of the users hand and controls the dryer’s fan motors and 2kW air heater accordingly, as well as multicolour LED illumination of the hand well.

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Hand Dryer PCB Reverse

The heating level (not just on/off) is controlled over time using a triac to manipulate the mains voltage waveform applied to the heater.

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Dryer LEDs – Red

A whole range of subtle lighting colour combinations are possible with RGB multicolour LEDs, not just red, green and blue.

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Dryer LEDs – Green

A whole range of subtle lighting colour combinations are possible with RGB multicolour LEDs, not just red, green and blue.

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Dryer LEDs – Blue

A whole range of subtle lighting colour combinations are possible with RGB multicolour LEDs, not just red, green and blue.

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Wireless Tag

The RF Tag can be detected over a good range, even inside, allowing the carriers presense or absense to be detected.

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LED light interface PCB

It is a surprising complex task to control LED trailer lights due to the variety of control methods and signals used in modern cars.

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LED Light Interface

This shows the board mounted in a car trailer connector. You can see the self resetting fuses (yellow) used for circuit protection.

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