| 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...
All items tagged with PDF and Time (297)
| When an older fax machine and a telephone, which share a line. are located in different rooms, an annoying situation may arise. When the...
| Most readers will be acquainted with a tone control as found on many audio amplifiers. Such a control normally consists of a potentiomet...
| Standard potentiometers have some unfortunate properties, such as crackling when they get older and unequal tracking in stereo types. A...
| The filter consists of two fourth -order sections in series. Various components in the second section have been given two different valu...
| The Type UGN3140 Hall-sensor from Sprague enables a magnetic- field detector to be constructed that is conspicuous by its simplicity.
| The adaptor enables almost any NiCd charger to work on the reflex principle. It is simply connectect in parallel with a battery when thi...
| A small detector to indicate the present of a pulsating or alternating electric field is easily made from an inexpensive IC, an LED, a r...
| Most satellite receivers provide a direct voltage at their coaxtat output which, depending on the plane of polarization of the set progr...
| The regulator ensures slow turn on of the supply voltage. Starting at 1.25 V it takes 3 s before the full 15 V is available. The maximum...