K.H. Lorenz (11)

1-12-2002 | This circuit, which is designed for use with 6-V rechargeable batteries, provides automatic switchover to a reserve battery when the voltage...

1-12-2002 | This general-purpose crystal tester can be used to test and measure quartz crystals having frequencies from 30 kHz to 100 MHz. It is suitabl...

1-07-2002 | This circuit acts like a two-position switch but is operated using a pushbutton. After power has been applied, the circuit is in the followi...

1-12-2001 | Normally, two pushbuttons are needed to control a thyristor, namely — you guessed it — one to switch it on and one to switch it off. With th...

1-07-2001 | The circuit represents a general-purpose astable multivibrator that alternatively energises two heavy loads via a relay (in this case, the l...

1-12-2000 | This rev counter is unusual in that it has no direct electrical connection to the ignition system of the engine. It is also unnecessary to a...

1-07-1999 | The purpose of this circuit is to generate a pulse with a predefined duration when a button is pressed. It is especially well suited for u...

1-07-1999 | Many pulse generators with adjustable duty cycle have a significant drawback, in that the pulse repetition rate also changes when the duty...

1-12-1998 | There are systems in which it is imperative that the supply voltage of, say, a motor, always has the correct polarity.

1-12-1992 | With the aid of a few components a standard relay can be made to change state every time a pulse is applied (or a switch is pressed).