All items tagged with technology and PDF (297)

1-07-1991 | To prevent the dynamo-driven lights of your bicyle going out when you stop in the dark for, say, traffic lights, the simple circuit here...

1-07-1991 | Many people still use the old C64 computer to play games on, but get frequently annoyed by the constant need of changing over the joysti...

1-07-1991 | The pump in sorne central-heating systems has two or even three speeds. At the lowest speed, not much hot water is pumped around the cir...

1-07-1991 | There are nowadays so many different standards for buses and networks that it was thought useful to present an overview of the most current...

1-07-1991 | Telephones are now readily and cheaply available: two identical ones and a handful of components enable a simple house-telephone to be s...

1-07-1991 | A frequent annoyance with battery-operated equipment is that just after you switch it on you notice that the battery is fIat. Quite proba...

1-07-1991 | The charger deseribed switches off the charging voltage when the battery reaches its full nominal voltage and switches it on again when...

1-07-1991 | Some radio amateurs are very keen on accurn te RST reports, others (mostly the VHF/UHF fraternity) never look at the 5- meter on the rec...

1-07-1991 | Although there are a number of ICs on the market with which it is quite simple to construct an LED VU meter, there is still interest in buil...

1-07-1991 | The circuit in the diagram is intended for synchronous, wireless triggering of one or more slave flash units when the mother flash is tr...