- on Miscellaneous Electronics
- Published in issue 7/2008 on page 41
Ordinary LED flashers turn the LED on and off abruptly, which can get a little irritating after a while. The circuit shown here is more gentle on the eyes: the light intensity changes very slowly and sinusoidally, helping to generate a relaxed mood. This circuit is capable of driving two LEDs in series without affecting the current. The frequency is set by three RC networks.