On 4qd.co.uk we sell a range of motor controllers and accessories for your projects...
4QD Ltd manufacture electronic motor speed controls for battery motors. We don't publish our latest and commercially sensitive circuits. However a lot of the ones here are original and although you are free to use them for your own entertainment, 4QD Ltd retains intellectual property rights to them insofar as they may have commercial value. If you do find them commercially useful, then please contact us for permission to use them. Under no circumstances may they be published in any form without written permission from the author...
These circuits are supplied 'as is' at no charge, for your enjoyment. So far as we are aware they are complete and work but we can take no responsibility for any errors. Most, but not all, of the circuits are our own design. As far as we are aware no copyright other that the author's exists on any of them but we cannot guarantee this.
Also known as: 4QD Ltd, 4QD-TEC