| This microcontroller-based relay circuit is capable of activating devices remotely after a delay up to 255 years. The solution is ideal for...
All items tagged with Circuit and relay (9)
| In a not yet dim past we started this series with an ‘energy-efficient relay’. Here is a variation on that topic, and a super-simple one at...
| In the second episode of this series we described and energy-efficient relay with a few interesting characteristics. Here the authors elabor...
| ElektorLabs editors are inundated with reader e-mails expressing praise as well as criticism. One of those criticisms in recent years was th...
| Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that problem...
| Excessive noise is bad for your health and bad for your surroundings. It cannot be said too often: too many young people go prematurely...
| The up/down drive is intended primarily for use with the tone controls described elsewhere in this issue.
| Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit pre...
| The AD8037 is a rather special opamp because its positive and negative inputs have internal clamps. The clamp at the negative input is e...