This is a simple blinking led circuit powered from 220V that can be used to mark special places or as voltage indicator. The voltage from the mains charges the capacitor through R1 resistor and D1 ...

It’s late at night. The solder smoke keeps getting in your tired eyes, but your project is nearly done. The main circuit is powered by your 13.8 V bench supply, but part of the circuit needs … ...

I used to make blinking jewellery with them in the 1980s. I have 3 left , if anyone knows where to buy them cheap please let me know. I wish someone would make them again in an SMD package.

The simple solution to screen fatigue: Scientists say 20 seconds of BLINKING can stop computer users getting eye strain. By MARK PRIGG . Published: 15:42 EDT, 13 March 2013 | Updated: 05:09 EDT ...

Doctors say simple fixes like blinking are best for eyestrain from screen gazing. Skip to content. All Sections. Subscribe Now. 61°F. Thursday, April 17th 2025 Digital Replica Edition.

This simple scheme is based on the circuit shown below (Figure 1) in my recent article [1]. Figure 1 Using common transistor optocoupler to achieve a tube-like sound. It is known that the main feature ...