I have used Red and Green LED’s. When node A is positive green LED glows while when node B is positive, Red LED glows. This indicates polarity of the input d.c voltage . 2) LED as a Continuity tester: ...

LED Tester Circuit Schematic simple led tester schematic. Why 3V? 3V is sufficient to turn on any LED, but is within its reverse break down voltage rating (that is why I did not use the common 9V ...

Building simple circuits with copper tape, LED bulbs, resistors, and watch batteries is not as simple as you might think. Notre Dame Elementary School STEM students are putting the engineering ...

Here’s a simple project for your Halloween celebration. ... Below is the schematic we created in EAGLE and a parts list. ... 16 thoughts on “ Flickering LED Circuit ” anon says: ...

Photos of a transparent LED screen with a “ZJU” pattern on toughened glass, emitting different colours under corresponding biases. (Courtesy: Liu Yang, Zhejiang University) Researchers in China have ...

This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

LED driver outputs may also be damaged or destroyed by short circuits. Most LED drivers include built-in safety features, including thermal shutdown, as well as open and short LED detection. However, ...

This boost circuit implements current mode control and senses the LED current via resistor R14. The output voltage is boosted to just over 30V to drive 10 LEDs at a regulated current of 0.35A. Often, ...

What could be better than sewing a circuit into wearable fabric? How about rolling your own circuit-ready knits? Chicago-based artist and assistant professor [Jesse] has done just that by perfectin… ...