Elektor Team (9517)

1-07-1983 | n microprocessor "stethoscope" It is often necessary to see exactly what logic activity is occurring on the address, data or control busses...

1-07-1983 | 5 symmetrical harmonic oscillator The remarkable thing about this oscillator is not that it operates on the third overtone of a crystal nor...

1-07-1983 | elektor july/august 1983 stepped- voltage generator This circuit converts an input signal into one that is composed of a num- ber of discret...

1-07-1983 | 7 power backup for CMOS ICs during mains power failures Even very brief mains power failures cause problems forelectronic circuits. Stored d...

1-07-1983 | LJ doorbel) memory On occasion it may be useful to know when a visitor has called in your absence. This is especially true in the case of an...

1-07-1983 | elektor july/august 1983 capacitance meter In this capacitance m eter, the value of a capacitor is determined by giving it the same charge a...

1-07-1983 | 10 electronic tuning fork A standard tuning fork produces a tone of 440 Hz, that is, the inter- national A (orchestral pitch). It is not ver...

1-07-1983 | 11 noise and vibration detector Whether it is the hi-fi next door, the cat purring quietly, or a knock at the door, the detector described h...

1-07-1983 | elektor july/august 1983 1 car PDM amplifier T This power amplifier, designed for use in a car, delivers 10 W into 4 S2 and because it uses...

1-07-1983 | 13 Iogarithmic amplifier The performance of the operational amplifier, the circuit diagram of which is shown in figure 1, is best seen from...