All items tagged with technology and PDF (297)

1-07-1994 | Reversal of the supply lines to a circuit normally has disastrous consequences. The protection described here can prevent such a disaste...

1-07-1994 | Electric points of a model railway system contain two small magnets. To set the potnts ina gtven position, one ofthese magnets must be e...

1-07-1994 | Quartz crystals are ground by the manufacturers to oscillate either on the fundamental frequency or on one of the odd harmonics (overton...

1-07-1994 | It is not two well-known that If the characteristics of the two transistors making up a multivibrator are near-identical, it is very dif...

1-07-1994 | Occasionally, an ideal fullwave rectifier is required, for example inadynamie compressor where switching thresholds and non-linear behav...

1-12-1993 | Pulse width modulation (PWM) is Ideal for controlling small electric PCB drills that draw currents of up to 2 A. Larger currents are poss...

1-12-1993 | The circuit presented here ensures that bicycle lights remain on for a little while after the bicycle (and thus the dynamo) has corne to...

1-12-1993 | Integrated circuits ISDI012, ISDI016, and ISD I020 from chip maker ISD enable sounds to be recorded and played back. The final two digits...

1-12-1993 | Undesired listening-in to telephone conversations may be prevented by the present circuit, which requires only two components to protect...

1-12-1993 | The transmitter is intended primarilyy for use with the receiver in the preceding article. lt works from two small 1.5 V dry batteries or...