We are always happy to design electronic and microprocessor control products to your exact requirements, and can usually provide a low-cost and quick turn-round service. 
A typical example of this type of work was produced for Aerovac Systems to provide a means of flash testing vacuum bagging material. This unit (pictured right) was produced in approximately four weeks from enquiry to delivery, and features microprocessor control of a rising current to test the self-extinguishing characteristics of different bagging materials.
Another recent design was produced for the control of various lighting and sound effects by utilizing a computer parallel port. The unit shown is capable of providing eight channels of mains switching at a maximum of five Amps per channel to an overall maximum of thirteen Amps. The unit is controlled by simple parallel port commands, which can easily be written into existing control programs or written as a stand-alone application. 
Download data sheet (pdf) here
A useful variation on the mains relay box shown above is a low-voltage version designed for educational use. This unit is powered from a standard 12 Volt plug-in power supply and again attaches to the parallel port of a pc to allow control of four channels, each capable of switching 5 Amps at up to 24V DC. The unit is supplied complete with 12 Volt power supply and a suitable parallel port cable. All output connections are made using standard 4mm plugs.
Download data sheet (pdf) here
The humidity controller shown opposite was designed and produced for Electrotek of West Yorkshire. The unit controls the level of humidity in an anaerobic cabinet, diving a dehumidifying fan when the measured humidity level rises above a set level. This design utilizes a remotely positioned humidity sensor, allowing the user to position the sensor in the most appropriate area, while the circuit board itself can be positioned away from the test area.
Download data sheet (pdf) here
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Cape Electronics
Unit 53, Mantra House, South Street, Keighley, West Yorkshire BD21 1SX Phone/Fax 01535 690737
email: enquiries@capeelectronics.co.uk