This is what makes the UJT useful, especially in simple oscillator circuits. Working of Mock Flasher LED. UJT 2N 2646 is used as a simple oscillator with the oscillating components R1 and C2. The LED ...

The “two flashing led” circuit is designed for 9 Volts but it works at lower voltages too. In this design we used red leds but by changing the series resistors R1 and R4 you can also use different LED ...

In Figure 1, National Semiconductor's LM3710, a supervisory circuit, is configured to reduce the power consumption of a traditional LED indicator by 99%. When V IN is above 4.4 V, green LED1 ...

He discovered parasitic circuit formed by the neon switch backlight lamp (equivalent of the current source in here) and by the LED rectifier capacitor. LED’s switching converter starting point acts as ...

Regular Hackaday readers will be familiar with the work of Boldport’s [Saar Drimer] in creating beauty in printed circuit board design. A recent work of his is the Widlar, a tribute to the le… ...

The LEDs drop 2V at 25mA, rather than 2.2V, which makes things slightly easier. As before, the three diodes on the right of the circuit are pretending to be an led. Back to LTspice now, to get the ...