| This circuit allows one or several mains-operated apparatus (‘slaves’) to be automatically switched on when a ‘master’ apparatus is swit...
| This circuit allows one or several mains-operated apparatus (‘slaves’) to be automatically switched on when a ‘master’ apparatus is swit...
| The humidifier circuit is based on a special humidity sensor Type NH-3 from Figaro. Depending on the sensor output, the circuit drives a...
| Active rectifiers often consist of an op amp circuit with diodes in the feedback loop. Such traditional arrangements work very well in m...
| The video amplifier in the diagram is a well-known design. Simple, yet very useful, were it not for the ease with which the transistors...
| This little circuit will be valued highly whenever a signal is required for the testing of infrared receivers. In most cases, such a tes...
| Used with care, this circuit can provide a small degree of stimulation for muscles. Two electrodes are fixed on the skin covering the mu...
| This design is based on the celebrated 555 timer IC, and changes a positive voltage of 9 V into a negative one. A low-power dc-dc conver...
| Developments in the world of rechargeable batteries, and the new models that have appeared in recent years, such as the metal hydride...
| The U2514B is an integrated bipolar radio circuit suitable for digital tuning systems. It contains an FM front end with preamplifier a...
| The MPAA series of Field Programmable Analog Arrays from Motorola is a new family of products that have programmable analogue building...