While fibre-optic cables may have potential advantages over ordinary electric cables, for the electronics enthusiast it is probably their novelty value that makes them worthy of exploration. Fibre-optic cables provide an innovative interesting alternative to electric cables, but inmost cases they also represent a practical approach to the problem. Although this subject is not one that has been totally ignored in the electronics press, practical designs using fibre-optics have so far been a bit "thin on the ground". This book provides a number of tried and tested circuits for projects that utilize fibre-optic cables. The projects include: simple audio links, F.M. audio links, P.W.M. audio links, simple d.c. links, P.W.M. d.c. link, P.W.M. motor speed control, RS232C data links, loop alarms, R.P.M. meter. All the components used in these designs are readily available, none of them require the constructor to take out a second mortgage.