| Lithium coin cells in the 2032 format and similar batteries are commonly used as “keep-alive” energy sources to maintain data and keep clock...
All items tagged with Circuit and Circuit Special 2024 (11)
| 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...
| Power banks often shut down when connected to low-current devices. This project offers a solution using a microcontroller (module) to keep t...
| 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...
| Some clocks use the frequency of the mains voltage to keep accurate time. But what if a design is intended for a 50-Hz mains and doesn't...
| If you want a solution to precisely control a device by temperature, check out this thermistor-based analog thermostat. With an adjustment r...