| This time we’ll look at a kit for a remote control that allows you to send ten digital control signals over a distance of more than 50 metre...
Hans Steemann (16)
| One interface that is missing in the Lego MindStorms system is an electronic ear. We don’t mean that the RCX should respond to spoken comman...
| Up to now, there has not been an analogue input for the RCX block. The circuit presented here allows the RCX block to detect analogue voltag...
| One of the main limitations of the RCX module of the Lego Robotics Invention System is that only one switch can be connected to a given inpu...
| The Robotics Invention System is an outstanding choice for building advanced robots. Various types of sensors can be read out using the RCX...
| Those small indicators that either flash or vibrate when there is a mobile phone call are well known by now. But how can they monitor the ac...
| It is sometimes necessary to make an electrically isolated connection in a circuit. An optocoupler is usually the key component in such a si...
| A bandpass filter is usually used to pass frequencies within a certain frequency range. If a high-performance opamp is used, such a filter c...
| The signal from a microphone is two weak for a standard line input. This low-noise DC-coupled microphone amplifier provides a solution for a...
| Phonographs are gradually becoming a rarity. Most of them have had to yield to more advanced systems, such as CD players and recorders or (p...