| To develop and service electrocardiogram (ECG) equipment, an artificial signal that mimics a real ECG is essential. Elektor presented this e...
All items tagged with Circuit and Circuits & Circuit Design (42)
| Learn how to read two potentiometers on a single digital input using a Schmitt-Trigger inverter and just six components. This compact, affor...
| RS-485 or RS-422 buses are still widely used in industry for access control, video surveillance and many other applications. However, the st...
| When measuring distortion in audio devices, it makes sense to filter out the controlling sinusoidal signal before the spectrum analyzer. Thi...
| In audio circuits, the innovative technique of virtual grounds provides a viable alternative to the traditional method of switching signal l...
| In an audio chain, it may be useful to have an insertion point for an additional signal-conditioning device, such as a dynamics compressor/e...
| The popular ESP8266 and ESP32 development boards will not run for long from a single Li-ion cell. The on-board regulator is the problem and...
| This microcontroller-based relay circuit is capable of activating devices remotely after a delay up to 255 years. The solution is ideal for...
| In the EU and California, USB-C power adapters are now mandatory for cell phones and many other portable devices. So if you need some power...
| Standard logic ICs such as the 4017, a 5-stage divide-by-10 counter, can be used in many applications instead of microcontrollers — for exam...