Elektor Team (9534)

1-07-1977 | Depending on type and the current flowing, • the forward voltage drop of an LED may lie between 1.4 and 2 volts. The temperatur...

1-07-1977 | Using a µA 739 dual, tow-noise op-amp it is a simple matter to construct a versatile preamplifier for a magnetic guitar pick-up...

1-07-1977 | Using a µA 739 dual, tow-noise op-amp it is a simple matter to construct a versatile preamplifier for a magnetic guitar pick-up...

1-07-1977 | As PLL (phase-locked loop) ICs are still somewhat expensive it seems reasonable to look around for a cheaper alternative,...

1-07-1977 | As PLL (phase-locked loop) ICs are still somewhat expensive it seems reasonable to look around for a cheaper alternative,...

1-07-1977 | Using two CMOS NAND gates (or inverters) and two transistors it is possible to construct a simple current-controlled oscillator (CCO...

1-07-1977 | Using two CMOS NAND gates (or inverters) and two transistors it is possible to construct a simple current-controlled oscillator (CCO...

1-07-1977 | This circuit is designed to give an audible and visible warning to the absent-minded motorist who forgets to switch off...

1-07-1977 | This circuit is designed to give an audible and visible warning to the absent-minded motorist who forgets to switch off...

1-07-1977 | his circuit can be used as a tuning indicator, instead of the more common pointer instru- ment. It gives a three-LED indication...