From: Bob Gardner

I have developed an extremely versatile solid-state device based on LEDs that forms a means to make electrical current visible over a huge range. The device operates from +/-3mA to >10 Amps while only requiring a parasitic +/-0.35 Volts to operate and where it renders visible signals in any colour required from red to white and comes complete with 2 opto-isolator channels that allow connection to sensitive computer control systems. Current presence, polarity and phase information can be gained at very low cost. The device represents a means to use ordinary LED's in their current mode alone allowing their use at any line voltage AC or DC.
It can even be powered through a current transformer to provide many solutions in high voltage circuitry running into thousands of Amps.
Recently it won a Silver Medal at the International inventions Fair, Geneva when taken there by the Welsh Development Agency on my behalf. It can be used wherever a current flows, from non sparking Intrinsically Safe circuits to 600kV overhead lines.
When used in control circuits an opportunity to make the circuit's operation entirely visible to man and machine exists, while reducing the amount of wire required, multiplying the functionality and allowing fault tolerant simple circuits to be easily configured.
Solenoid valves can be operated over a two wire circuit complete with a means of closed loop feedback at small cost. Multiphase motors can be protected from single phasing at the speed of light.
What do I need?
A development and manufacturing partner.
How can I be contacted?
Telephone +44 1446 741180
Email docrobgar@aol.com