| Various electronics mail order outlets are currently advertising simple and relatively cheap wireless control system for use in and around...
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| The circuit presented here illustrates the fact that in spite of all kinds of new component and technology, it is still possible to desi...
| Pedestrians run grave dangers when, in badly-lit areas, they cross a road at night in dark clothing, because this means that car drivers...
| In this article we answered your letters about our articles of the last months.
| A Bessel filter has a fairly constant transit time (delay) over the pass band, but its amplitude characteristic starts to fall off rather...
| In certain applications it may be desirable, in order to limit unnecessary power losses, to have the use of a diode with a forward voltag...
| The present filter has an amplification ofx2, so that R5 and R6 in the feedback loop can be equivalent. In other words, their ratio is n...
| This tiny circuit can be used as a movement alarm in many situations: in a suitcase or on a bicycle to name but a few.
| The filter consists of two fourth -order sections in series. Various components in the second section have been given two different valu...
| As usual in RC filter designs. resistors R1-R4 and R5-R8 are given equal values. Unfortunately, again as usual. This leads to rather awk...