- RS-232 splitter
- BBD sound effects unit (2):
FINAL PART - The digital model train (final part):
CONCLUDING PART - Wiring allocation tester
- Video line selector
- Parallel processing for faster computing
- Technological advances in crime detection
- Robots for the rag trade
- Q meter
- Video mixer (4)>
CONSTRUCTlON, ALlGNMENT AND PRACTICAL USE - Watford Electronics
- Test box
- Bridge rectifiers revisited:
HIGH-EFFICIENCY AC-OC CONVERTER/VOLTAGE MULTIPLIER - Digitally-controlled preamplifier
- Automatic mains isolating switch
- Coded locking circuit for security systems