Ton Giesberts (358)

1-07-2005 | Anyone who has designed circuits using the 555 timer chip will, at some time have wished that it could be programmed for longer timing perio...

1-07-2005 | Many new devices require a headphone connection, but due to the high level of integration and miniaturisation there is usually little room l...

1-07-2005 | We have designed a fairly compact adapter that lets you connect an MP3 player (or any other portable device) to the SCART socket of a TV. It...

1-07-2005 | In most WCs with an extractor the fan is connected to the lighting circuit and is switched on and off either in sympathy with the light or w...

1-07-2005 | This two-part circuit was designed as an addition to the 'Compact 200 W Output Stage' in this issue. But it is also suitable for u...

1-07-2005 | These days, transmit- and receive modules that operate on the well-known 433-MHz licence-free frequency are reasonably cheap and freely avai...

1-07-2005 | This circuit works together with a transmitter described elsewhere in this issue to form a remote-control extender. Due to its limited bandw...

1-07-2005 | The LR12 made by Supertex Inc. is a good choice for applications where a supply voltage of more than 35 to 40 V needs to be stabilised. This...

1-07-2005 | There are various types of active filters, and the Sallen–Key version is probably the most commonly used type. A voltage follower is usually...

1-07-2005 | The MAX7378 contains two oscillators and a power-on reset circuit for microprocessors. The Speed input selects either 32.768 kHz (LF) or a h...